Set Read/Write timeouts only for net.Conn not http.Server (#7431 )

Fixes #7425
HealObjects should remove objects without quorum (#7407 )
2026-11-02 05:42:06 +03:00 · 2019-03-27 22:10:06 +05:30 · 2019-03-26 14:57:44 -07:00 · 2019-03-26 13:59:33 -07:00 · 2019-03-25 13:41:05 -07:00 · 2019-03-25 13:40:08 -07:00
144 changed files with 7067 additions and 3121 deletions
@@ -17,6 +17,7 @@ matrix:
      env:
        - ARCH=x86_64
        - CGO_ENABLED=0
+        - GO111MODULE=on
      go: 1.11.4
      script:
        - make
@@ -44,7 +45,7 @@ before_script:
  - if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then sudo sh -c 'echo 0 > /proc/sys/net/ipv6/conf/all/disable_ipv6'; fi

 before_install:
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then nvm install stable ; fi
+ - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then nvm install 11.10.1 ; fi

 after_success:
 - bash <(curl -s https://codecov.io/bash)
@@ -7,6 +7,9 @@ COPY . /go/src/github.com/minio/minio
 WORKDIR /go/src/github.com/minio/minio

 RUN apt-get update && apt-get install -y jq
+ENV GO111MODULE=on
+
+RUN git config --global http.cookiefile /gitcookie/.gitcookie

 RUN make
 RUN bash -c 'diff -au <(gofmt -s -d cmd) <(printf "")'
@@ -28,6 +31,7 @@ RUN groupadd -g 999 ci && \

 RUN chown -R ci:ci /go
 RUN chown -R ci:ci /home/ci
+RUN chmod -R a+rw /go 

 USER ci

@@ -58,9 +62,6 @@ COPY --from=0 /go/src/github.com/minio/minio/minio ./minio
 COPY buildscripts/gateway-tests.sh ./gateway-tests.sh
 RUN apt-get update && apt-get install -y git wget jq curl dnsmasq

-RUN wget https://dl.google.com/go/go1.11.4.linux-amd64.tar.gz && \
-	tar -C /usr/local -xzf go1.11.4.linux-amd64.tar.gz
-
 ENV DEBIAN_FRONTEND noninteractive
 ENV LANG C.UTF-8
 ENV GOROOT /usr/local/go
@@ -13,9 +13,10 @@ checks:
 	@(env bash $(PWD)/buildscripts/checkgopath.sh)

 getdeps:
-	@echo "Installing golint" && go get -u golang.org/x/lint/golint
-	@echo "Installing staticcheck" && go get -u honnef.co/go/tools/...
-	@echo "Installing misspell" && go get -u github.com/client9/misspell/cmd/misspell
+	@mkdir -p $(GOPATH)/bin
+	@echo "Installing golint" && which golint || go get -u golang.org/x/lint/golint
+	@echo "Installing staticcheck" && which staticcheck || wget --quiet -O $(GOPATH)/bin/staticcheck https://github.com/dominikh/go-tools/releases/download/2019.1/staticcheck_linux_amd64 && chmod +x $(GOPATH)/bin/staticcheck
+	@echo "Installing misspell" && which misspell || wget --quiet https://github.com/client9/misspell/releases/download/v0.3.4/misspell_0.3.4_linux_64bit.tar.gz && tar xvf misspell_0.3.4_linux_64bit.tar.gz && mv misspell $(GOPATH)/bin/misspell && chmod +x $(GOPATH)/bin/misspell && rm -r misspell_0.3.4_linux_64bit.tar.gz

 crosscompile:
 	@(env bash $(PWD)/buildscripts/cross-compile.sh)
@@ -4,7 +4,7 @@
    height: 100%;
    top: 0;
    left: 0;
-    background: #32393F;
+    background: #002a37;
    z-index: 100;
    transition: opacity 200ms;
    -webkit-transition: opacity 200ms;
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+<svg width="93px" height="187px" viewBox="0 0 93 187" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Generator: Sketch 48.2 (47327) - http://www.bohemiancoding.com/sketch -->
-    <title>Untitled 2</title>
+    <title>logo</title>
    <desc>Created with Sketch.</desc>
    <defs></defs>
    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
-        <g id="Minio_Logo_White" fill-rule="nonzero">
-            <g id="Group">
-                <path d="M225.835,28.882 C225.835,28.882 282.569,120.259 301.531,152.735 C301.837,153.264 301.707,153.963 301.251,154.419 C300.676,154.994 299.81,155.056 299.24,154.481 L201.484,52.243 L225.835,28.882 Z" id="Shape" fill="#F15A29"></path>
-                <path d="M58.706,361.854 C75.299,326.75 97.681,294.989 125.38,267.29 C135.915,256.76 147.036,247.002 158.701,238.037 L158.701,310.385 L58.706,361.854 Z M0.971,428.672 L158.7,348.375 L158.7,531.932 L194.244,578.623 L194.244,330.092 L215.833,318.987 C225.778,313.991 235.105,307.343 243.402,299.041 C284.517,257.931 285.17,191.574 245.226,149.749 L163.742,64.855 C160.493,61.383 158.788,56.838 158.938,52.06 C159.088,47.251 161.099,42.784 164.597,39.488 C171.811,32.704 183.305,33.161 190.088,40.369 L201.484,52.247 L225.835,28.881 C197.064,-8.431 161.861,-3.746 141.47,14.92 C131.417,24.383 125.644,37.198 125.208,51.003 C124.773,64.829 129.753,77.981 139.221,88.04 L139.33,88.159 L221.239,173.483 C248.176,202.151 247.637,247.235 219.617,275.255 C215.248,279.623 210.46,283.324 205.387,286.36 L194.245,292.091 L194.245,176.126 C160.167,193.688 129.09,216.251 101.692,243.655 C67.568,277.774 40.776,317.516 22.058,361.772 C12.875,383.479 5.837,405.829 0.971,428.672 Z" id="Shape" fill="#FFFFFF"></path>
-                <polygon id="Shape" fill="#BCBEC0" points="194.246 330.09 194.246 367.609 158.701 385.648 158.701 348.373"></polygon>
-            </g>
+        <g id="logo" transform="translate(0.187500, -0.683594)" fill="#FFFFFF" fill-rule="nonzero">
+            <path d="M91.49,46.551 C86.7827023,38.7699609 82.062696,30.9966172 77.33,23.231 C74.87,19.231 72.33,15.231 69.88,11.231 C69.57,10.731 69.18,10.291 68.88,9.831 C64.35,2.931 55.44,-1.679 46.73,2.701 C42.9729806,4.51194908 40.0995718,7.75449451 38.7536428,11.7020516 C37.4077139,15.6496086 37.701799,19.9721186 39.57,23.701 C41.08,26.641 43.57,29.121 45.91,31.581 C53.03,39.141 60.38,46.491 67.45,54.111 C72.4175495,59.4492221 74.4526451,66.8835066 72.8965704,74.0075359 C71.3404956,81.1315653 66.390952,87.0402215 59.65,89.821 C59.4938176,89.83842 59.3361824,89.83842 59.18,89.821 L59.18,54.591 C46.6388051,61.0478363 35.3944735,69.759905 26.01,80.291 C11.32,96.671 2.64,117.141 0.01,132.071 L23.96,119.821 C31.96,115.771 39.86,111.821 48.14,107.581 L48.14,175.921 L59.14,187.131 L59.14,101.831 C59.14,101.831 59.39,101.711 60.22,101.261 C63.5480598,99.6738911 66.7772674,97.8873078 69.89,95.911 C77.7130888,90.4306687 82.7479457,81.8029342 83.6709542,72.295947 C84.5939627,62.7889599 81.3127806,53.3538429 74.69,46.471 C66.49,37.891 58.24,29.351 50.05,20.761 C47.67,18.261 47.72,15.101 50.05,12.881 C52.38,10.661 55.56,10.881 57.96,13.331 L61.38,16.781 C64.1,19.681 66.79,22.611 69.53,25.481 C76.4547149,32.7389629 83.3947303,39.9823123 90.35,47.211 C90.7,47.571 91.12,47.871 91.5,48.211 L91.93,47.951 C91.8351945,47.4695902 91.6876376,47.0000911 91.49,46.551 Z M48.11,94.931 C47.9883217,95.5022568 47.6230065,95.9917791 47.11,96.271 C42.72,98.601 38.29,100.871 33.87,103.141 L17.76,111.401 C24.771203,96.7435071 35.1132853,83.9289138 47.96,73.981 C48.08,74.221 48.16,74.301 48.16,74.381 C48.15,81.231 48.17,88.081 48.11,94.931 Z" id="Shape"></path>
        </g>
    </g>
 </svg>
@@ -1,10 +1,14 @@
 <!DOCTYPE html>
 <html>
-
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
-        <title>Minio Browser</title>
+        <title>MinIO Browser</title>
+
+        <link rel="icon" type="image/png" sizes="32x32" href="/minio/favicon-32x32.png">
+        <link rel="icon" type="image/png" sizes="96x96" href="/minio/favicon-96x96.png">
+        <link rel="icon" type="image/png" sizes="16x16" href="/minio/favicon-16x16.png">
+
        <link rel="stylesheet" href="/minio/loader.css" type="text/css">
    </head>

@@ -23,7 +27,6 @@

                    You are using Internet Explorer version 12.0 or lower. Due to security issues and lack of support for Web Standards it is highly recommended that you upgrade to a modern browser

-
                    <ul>
                        <li>
                            <a href="http://www.google.com/chrome/">
@@ -38,7 +38,7 @@ export const SideBar = ({ sidebarOpen, clickOutside }) => {
      >
        <div className="fes-header clearfix hidden-sm hidden-xs">
          <img src={logo} alt="" />
-          <h2>Minio Browser</h2>
+          <h2>MinIO Browser</h2>
        </div>
        <div className="fes-list">
          {web.LoggedIn() && <BucketSearch />}
@@ -170,10 +170,12 @@ select.form-control {
        position: absolute;
        left: 2px;
        top: 8px;
+        color: rgba(255, 255, 255, 0.5);
    }

    .ig-text {
        padding-left: 25px;
+        .placeholder(rgba(255, 255, 255, 0.5))
    }
 }

@@ -1,7 +1,7 @@
 .login {
    height: 100vh;
    min-height: 500px;
-    background: @dark-gray;
+    background: #002a37;

    text-align: center;
    &:before {
@@ -99,6 +99,7 @@
    Chrome autofill fix
 -------------------------------*/
 input:-webkit-autofill {
-     -webkit-box-shadow:0 0 0 50px @dark-gray inset !important;
+     -webkit-box-shadow:0 0 0 50px #002a37 inset !important;
     -webkit-text-fill-color: @white !important;
+    caret-color: white;
 }
@@ -50,3 +50,12 @@
    -webkit-animation: zoomIn 250ms, spin 700ms 250ms infinite linear;
    animation: zoomIn 250ms, spin 700ms 250ms infinite linear;
 }
+
+/*----------------------------------------
+    Placeholder
+-----------------------------------------*/
+.placeholder(@color) {
+    ::-webkit-input-placeholder { color: @color }
+    ::-moz-placeholder { color: @color }
+    :-ms-input-placeholder { color: @color }
+}
@@ -32,7 +32,7 @@
    }

    .modal-content {
-        background-color: @dark-gray;
+        background-color: #00303f;
    }
 }

@@ -139,8 +139,8 @@
            top: 0;
            left: 0;
            position: absolute;
-            border-radius: 3px 0 0px 3px;
-            background-color: #23282C;
+            border-radius: 3px 0 0 3px;
+            background-color: #022631;
        }
    }
 }
@@ -3,7 +3,7 @@
 ----------------------------*/
 .fe-sidebar {
 	width: @fe-sidebar-width;
-	background-color: @dark-gray;
+	background-color: @fe-sidebar-bg;
 	position: fixed;
 	height: 100%;
 	overflow: hidden;
@@ -27,7 +27,7 @@
 	}

 	a {
-		color: rgba(255, 255, 255, 0.58);
+		color: rgba(255, 255, 255, 0.75);

 		&:hover {
 			color: @white;
@@ -47,12 +47,14 @@
 	}

 	h2 {
-		margin: 13px 0 0 10px;
+		margin: 6px 0 0 13px;
 		font-weight: normal;
+		color: @white;
+		font-size: 20px;
 	}

 	img {
-		width: 32px;
+		width: 20px;
 	}
 }

@@ -95,7 +97,7 @@
 		}

 		&.active {
-			background-color: #282e32;
+			background-color: rgba(0,0,0,0.1);

 			& > a {
 				color: @white;
@@ -103,7 +105,7 @@
 		}

 		&:not(.active):hover {
-			background-color: rgba(0, 0, 0, 0.1);
+			background-color: rgba(0, 0, 0, 0.05);

 			& > a {
 				color: @white;
@@ -192,8 +194,7 @@
 	left: 0;
 	bottom: 0;
 	z-index: 1;
-	background: @dark-gray;
-	color: rgba(255, 255, 255, 0.4);
+	background-color: rgba(0,0,0,0.1);
 	font-size: 15px;
 	font-weight: 400;
 	width: @fe-sidebar-width;
@@ -14,9 +14,11 @@
    File Explorer
 ----------------------------*/
@fe-sidebar-width                   : 320px;
+@fe-sidebar-bg                      : #00303f;
@text-muted-color                   : #BDBDBD;
@text-strong-color                  : #333;

+
 /*--------------------------
    Colors
 ----------------------------*/
@@ -93,11 +93,13 @@ var exports = {
  plugins: [
    new CopyWebpackPlugin([
      {from: 'app/css/loader.css'},
-      {from: 'app/img/favicon.ico'},
      {from: 'app/img/browsers/chrome.png'},
      {from: 'app/img/browsers/firefox.png'},
      {from: 'app/img/browsers/safari.png'},
      {from: 'app/img/logo.svg'},
+      {from: 'app/img/favicon/favicon-16x16.png'},
+      {from: 'app/img/favicon/favicon-32x32.png'},
+      {from: 'app/img/favicon/favicon-96x96.png'},
      {from: 'app/index.html'}
    ]),
    new webpack.ContextReplacementPlugin(/moment[\\\/]locale$/, /^\.\/(en)$/),
@@ -69,11 +69,13 @@ var exports = {
  plugins: [
    new CopyWebpackPlugin([
      {from: 'app/css/loader.css'},
-      {from: 'app/img/favicon.ico'},
      {from: 'app/img/browsers/chrome.png'},
      {from: 'app/img/browsers/firefox.png'},
      {from: 'app/img/browsers/safari.png'},
      {from: 'app/img/logo.svg'},
+      {from: 'app/img/favicon/favicon-16x16.png'},
+      {from: 'app/img/favicon/favicon-32x32.png'},
+      {from: 'app/img/favicon/favicon-96x96.png'},
      {from: 'app/index.html'}
    ]),
    new webpack.ContextReplacementPlugin(/moment[\\\/]locale$/, /^\.\/(en)$/),
@@ -45,8 +45,6 @@ export MINT_RUN_SECURITY_DIR="$MINT_ROOT_DIR/run/security"
 export MINT_MODE="full"
 export WGET="wget --quiet --no-check-certificate"

-go get github.com/go-ini/ini
-
 ./create-data-files.sh
 ./preinstall.sh

@@ -1,12 +1,6 @@
 #!/usr/bin/env bash

 set -e
-echo "" > coverage.txt

-for d in $(go list ./... | grep -v browser); do
-    CGO_ENABLED=0 go test -v -coverprofile=profile.out -covermode=atomic "$d"
-    if [ -f profile.out ]; then
-        cat profile.out >> coverage.txt
-        rm profile.out
-    fi
-done
+
+CGO_ENABLED=0 go test -v -coverprofile=coverage.txt -covermode=atomic ./...
@@ -319,11 +319,10 @@ function __init__()
    mkdir -p "$MINIO_CONFIG_DIR"
    mkdir -p "$MINT_DATA_DIR"

-    if ! go get -u github.com/minio/mc; then
-        echo "failed to download https://github.com/minio/mc"
-        exit 1
-    fi
-    /bin/cp -a "$(go env GOPATH)"/bin/mc "$WORK_DIR/mc"
+   git clone https://github.com/minio/mc 
+   cd mc
+   go build 
+   /bin/cp -a ./mc "$WORK_DIR/mc"

    chmod a+x "$WORK_DIR/mc"

@@ -177,11 +177,12 @@ func (a adminAPIHandlers) ServiceStopNRestartHandler(w http.ResponseWriter, r *h
 // ServerProperties holds some server information such as, version, region
 // uptime, etc..
 type ServerProperties struct {
-	Uptime   time.Duration `json:"uptime"`
-	Version  string        `json:"version"`
-	CommitID string        `json:"commitID"`
-	Region   string        `json:"region"`
-	SQSARN   []string      `json:"sqsARN"`
+	Uptime       time.Duration `json:"uptime"`
+	Version      string        `json:"version"`
+	CommitID     string        `json:"commitID"`
+	DeploymentID string        `json:"deploymentID"`
+	Region       string        `json:"region"`
+	SQSARN       []string      `json:"sqsARN"`
 }

 // ServerConnStats holds transferred bytes from/to the server
@@ -256,11 +257,12 @@ func (a adminAPIHandlers) ServerInfoHandler(w http.ResponseWriter, r *http.Reque
 			ConnStats:   globalConnStats.toServerConnStats(),
 			HTTPStats:   globalHTTPStats.toServerHTTPStats(),
 			Properties: ServerProperties{
-				Uptime:   UTCNow().Sub(globalBootTime),
-				Version:  Version,
-				CommitID: CommitID,
-				SQSARN:   globalNotificationSys.GetARNList(),
-				Region:   globalServerConfig.GetRegion(),
+				Uptime:       UTCNow().Sub(globalBootTime),
+				Version:      Version,
+				CommitID:     CommitID,
+				DeploymentID: globalDeploymentID,
+				SQSARN:       globalNotificationSys.GetARNList(),
+				Region:       globalServerConfig.GetRegion(),
 			},
 		},
 	})
@@ -319,9 +321,8 @@ func (a adminAPIHandlers) PerfInfoHandler(w http.ResponseWriter, r *http.Request
 	}

 	vars := mux.Vars(r)
-	perfType := vars["perfType"]
-
-	if perfType == "drive" {
+	switch perfType := vars["perfType"]; perfType {
+	case "drive":
 		info := objectAPI.StorageInfo(ctx)
 		if !(info.Backend.Type == BackendFS || info.Backend.Type == BackendErasure) {
 			writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrMethodNotAllowed), r.URL)
@@ -344,7 +345,7 @@ func (a adminAPIHandlers) PerfInfoHandler(w http.ResponseWriter, r *http.Request
 		// Reply with performance information (across nodes in a
 		// distributed setup) as json.
 		writeSuccessResponseJSON(w, jsonBytes)
-	} else if perfType == "cpu" {
+	case "cpu":
 		// Get CPU load details from local server's cpu(s)
 		cpu := localEndpointsCPULoad(globalEndpoints)
 		// Notify all other Minio peers to report cpu load numbers
@@ -361,7 +362,7 @@ func (a adminAPIHandlers) PerfInfoHandler(w http.ResponseWriter, r *http.Request
 		// Reply with cpu load information (across nodes in a
 		// distributed setup) as json.
 		writeSuccessResponseJSON(w, jsonBytes)
-	} else if perfType == "mem" {
+	case "mem":
 		// Get mem usage details from local server(s)
 		m := localEndpointsMemUsage(globalEndpoints)
 		// Notify all other Minio peers to report mem usage numbers
@@ -378,7 +379,7 @@ func (a adminAPIHandlers) PerfInfoHandler(w http.ResponseWriter, r *http.Request
 		// Reply with mem usage information (across nodes in a
 		// distributed setup) as json.
 		writeSuccessResponseJSON(w, jsonBytes)
-	} else {
+	default:
 		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrMethodNotAllowed), r.URL)
 	}
 }
@@ -1479,14 +1480,6 @@ func (a adminAPIHandlers) UpdateAdminCredentialsHandler(w http.ResponseWriter,
 		return
 	}

-	// Notify all other Minio peers to update credentials
-	for _, nerr := range globalNotificationSys.LoadCredentials() {
-		if nerr.Err != nil {
-			logger.GetReqInfo(ctx).SetTags("peerAddress", nerr.Host.String())
-			logger.LogIf(ctx, nerr.Err)
-		}
-	}
-
 	// Reply to the client before restarting minio server.
 	writeSuccessResponseHeadersOnly(w)
 }
@@ -21,14 +21,12 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
-	"runtime"
 	"strings"
 	"sync"
 	"time"

 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/madmin"
-	"github.com/minio/minio/pkg/sync/errgroup"
 )

 // healStatusSummary - overall short summary of a healing sequence
@@ -573,51 +571,22 @@ func (h *healSequence) healMinioSysMeta(metaPrefix string) func() error {
 		// NOTE: Healing on meta is run regardless
 		// of any bucket being selected, this is to ensure that
 		// meta are always upto date and correct.
-		marker := ""
-		isTruncated := true
-		for isTruncated {
-			if globalHTTPServer != nil {
-				// Wait at max 1 minute for an inprogress request
-				// before proceeding to heal
-				waitCount := 60
-				// Any requests in progress, delay the heal.
-				for globalHTTPServer.GetRequestCount() > 2 && waitCount > 0 {
-					waitCount--
-					time.Sleep(1 * time.Second)
-				}
+		return objectAPI.HealObjects(h.ctx, minioMetaBucket, metaPrefix, func(bucket string, object string) error {
+			if h.isQuitting() {
+				return errHealStopSignalled
 			}
-
-			// Lists all objects under `config` prefix.
-			objectInfos, err := objectAPI.ListObjectsHeal(h.ctx, minioMetaBucket, metaPrefix,
-				marker, "", 1000)
-			if err != nil {
-				return errFnHealFromAPIErr(h.ctx, err)
+			res, herr := objectAPI.HealObject(h.ctx, bucket, object, h.settings.DryRun, h.settings.Remove, h.settings.ScanMode)
+			// Object might have been deleted, by the time heal
+			// was attempted we ignore this object an move on.
+			if isErrObjectNotFound(herr) {
+				return nil
 			}
-
-			for index := range objectInfos.Objects {
-				if h.isQuitting() {
-					return errHealStopSignalled
-				}
-				o := objectInfos.Objects[index]
-				res, herr := objectAPI.HealObject(h.ctx, o.Bucket, o.Name, h.settings.DryRun, h.settings.Remove)
-				// Object might have been deleted, by the time heal
-				// was attempted we ignore this file an move on.
-				if isErrObjectNotFound(herr) {
-					continue
-				}
-				if herr != nil {
-					return herr
-				}
-				res.Type = madmin.HealItemBucketMetadata
-				if err = h.pushHealResultItem(res); err != nil {
-					return err
-				}
+			if herr != nil {
+				return herr
 			}
-
-			isTruncated = objectInfos.IsTruncated
-			marker = objectInfos.NextMarker
-		}
-		return nil
+			res.Type = madmin.HealItemBucketMetadata
+			return h.pushHealResultItem(res)
+		})
 	}
 }

@@ -720,46 +689,9 @@ func (h *healSequence) healBucket(bucket string) error {
 		return nil
 	}

-	entries := runtime.NumCPU()
-
-	marker := ""
-	isTruncated := true
-	for isTruncated {
-		if globalHTTPServer != nil {
-			// Wait at max 1 minute for an inprogress request
-			// before proceeding to heal
-			waitCount := 60
-			// Any requests in progress, delay the heal.
-			for globalHTTPServer.GetRequestCount() > 2 && waitCount > 0 {
-				waitCount--
-				time.Sleep(1 * time.Second)
-			}
-		}
-
-		// Heal numCPU * nodes objects at a time.
-		objectInfos, err := objectAPI.ListObjectsHeal(h.ctx, bucket,
-			h.objPrefix, marker, "", entries)
-		if err != nil {
-			return errFnHealFromAPIErr(h.ctx, err)
-		}
-
-		g := errgroup.WithNErrs(len(objectInfos.Objects))
-		for index := range objectInfos.Objects {
-			index := index
-			g.Go(func() error {
-				o := objectInfos.Objects[index]
-				return h.healObject(o.Bucket, o.Name)
-			}, index)
-		}
-
-		for _, err := range g.Wait() {
-			if err != nil {
-				return err
-			}
-		}
-
-		isTruncated = objectInfos.IsTruncated
-		marker = objectInfos.NextMarker
+	if err = objectAPI.HealObjects(h.ctx, bucket,
+		h.objPrefix, h.healObject); err != nil {
+		return errFnHealFromAPIErr(h.ctx, err)
 	}
 	return nil
 }
@@ -770,13 +702,23 @@ func (h *healSequence) healObject(bucket, object string) error {
 		return errHealStopSignalled
 	}

+	if globalHTTPServer != nil {
+		// Wait at max 1 minute for an inprogress request
+		// before proceeding to heal
+		waitCount := 60
+		// Any requests in progress, delay the heal.
+		for globalHTTPServer.GetRequestCount() > 2 && waitCount > 0 {
+			waitCount--
+			time.Sleep(1 * time.Second)
+		}
+	}
 	// Get current object layer instance.
 	objectAPI := newObjectLayerFn()
 	if objectAPI == nil {
 		return errServerNotInitialized
 	}

-	hri, err := objectAPI.HealObject(h.ctx, bucket, object, h.settings.DryRun, h.settings.Remove)
+	hri, err := objectAPI.HealObject(h.ctx, bucket, object, h.settings.DryRun, h.settings.Remove, h.settings.ScanMode)
 	if isErrObjectNotFound(err) {
 		return nil
 	}
@@ -21,6 +21,7 @@ import (
 	"encoding/xml"
 	"fmt"
 	"net/http"
+	"strings"

 	"github.com/Azure/azure-sdk-for-go/storage"
 	"github.com/aliyun/aliyun-oss-go-sdk/oss"
@@ -179,6 +180,7 @@ const (
 	// Minio extended errors.
 	ErrReadQuorum
 	ErrWriteQuorum
+	ErrParentIsObject
 	ErrStorageFull
 	ErrRequestBodyParse
 	ErrObjectExistsAsDirectory
@@ -857,6 +859,11 @@ var errorCodes = errorCodeMap{
 		Description:    "Storage backend has reached its minimum free disk threshold. Please delete a few objects to proceed.",
 		HTTPStatusCode: http.StatusInsufficientStorage,
 	},
+	ErrParentIsObject: {
+		Code:           "XMinioParentIsObject",
+		Description:    "Object-prefix is already an object, please choose a different object-prefix name.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 	ErrRequestBodyParse: {
 		Code:           "XMinioRequestBodyParse",
 		Description:    "The request body failed to parse.",
@@ -1506,8 +1513,6 @@ func toAPIErrorCode(ctx context.Context, err error) (apiErr APIErrorCode) {
 		apiErr = ErrInvalidEncryptionMethod
 	case crypto.ErrInvalidCustomerAlgorithm:
 		apiErr = ErrInvalidSSECustomerAlgorithm
-	case crypto.ErrInvalidCustomerKey:
-		apiErr = ErrInvalidSSECustomerKey
 	case crypto.ErrMissingCustomerKey:
 		apiErr = ErrMissingSSECustomerKey
 	case crypto.ErrMissingCustomerKeyMD5:
@@ -1562,6 +1567,8 @@ func toAPIErrorCode(ctx context.Context, err error) (apiErr APIErrorCode) {
 		apiErr = ErrObjectExistsAsDirectory
 	case PrefixAccessDenied:
 		apiErr = ErrAccessDenied
+	case ParentIsObject:
+		apiErr = ErrParentIsObject
 	case BucketNameInvalid:
 		apiErr = ErrInvalidBucketName
 	case BucketNotFound:
@@ -1641,11 +1648,25 @@ func toAPIErrorCode(ctx context.Context, err error) (apiErr APIErrorCode) {
 	case crypto.Error:
 		apiErr = ErrObjectTampered
 	default:
-		apiErr = ErrInternalError
-		// Make sure to log the errors which we cannot translate
-		// to a meaningful S3 API errors. This is added to aid in
-		// debugging unexpected/unhandled errors.
-		logger.LogIf(ctx, err)
+		var ie, iw int
+		// This work-around is to handle the issue golang/go#30648
+		if _, ferr := fmt.Fscanf(strings.NewReader(err.Error()),
+			"request declared a Content-Length of %d but only wrote %d bytes",
+			&ie, &iw); ferr != nil {
+			apiErr = ErrInternalError
+			// Make sure to log the errors which we cannot translate
+			// to a meaningful S3 API errors. This is added to aid in
+			// debugging unexpected/unhandled errors.
+			logger.LogIf(ctx, err)
+		} else if ie > iw {
+			apiErr = ErrIncompleteBody
+		} else {
+			apiErr = ErrInternalError
+			// Make sure to log the errors which we cannot translate
+			// to a meaningful S3 API errors. This is added to aid in
+			// debugging unexpected/unhandled errors.
+			logger.LogIf(ctx, err)
+		}
 	}

 	return apiErr
@@ -55,7 +55,7 @@ var toAPIErrorTests = []struct {
 	// SSE-C errors
 	{err: crypto.ErrInvalidCustomerAlgorithm, errCode: ErrInvalidSSECustomerAlgorithm},
 	{err: crypto.ErrMissingCustomerKey, errCode: ErrMissingSSECustomerKey},
-	{err: crypto.ErrInvalidCustomerKey, errCode: ErrInvalidSSECustomerKey},
+	{err: crypto.ErrInvalidCustomerKey, errCode: ErrAccessDenied},
 	{err: crypto.ErrMissingCustomerKeyMD5, errCode: ErrMissingSSECustomerKeyMD5},
 	{err: crypto.ErrCustomerKeyMD5Mismatch, errCode: ErrSSECustomerKeyMD5Mismatch},
 	{err: errObjectTampered, errCode: ErrObjectTampered},
@@ -84,9 +84,11 @@ func newStreamingBitrotWriter(disk StorageAPI, volume, filePath string, length i
 		totalFileSize := bitrotSumsTotalSize + length
 		err := disk.CreateFile(volume, filePath, totalFileSize, r)
 		if err != nil {
-			logger.LogIf(context.Background(), err)
-			r.CloseWithError(err)
+			reqInfo := (&logger.ReqInfo{}).AppendTags("storageDisk", disk.String())
+			ctx := logger.SetReqInfo(context.Background(), reqInfo)
+			logger.LogIf(ctx, err)
 		}
+		r.CloseWithError(err)
 		close(bw.canClose)
 	}()
 	return bw
@@ -125,7 +127,9 @@ func (b *streamingBitrotReader) ReadAt(buf []byte, offset int64) (int, error) {
 		streamOffset := (offset/b.shardSize)*int64(b.h.Size()) + offset
 		b.rc, err = b.disk.ReadFileStream(b.volume, b.filePath, streamOffset, b.tillOffset-streamOffset)
 		if err != nil {
-			logger.LogIf(context.Background(), err)
+			reqInfo := (&logger.ReqInfo{}).AppendTags("storageDisk", b.disk.String())
+			ctx := logger.SetReqInfo(context.Background(), reqInfo)
+			logger.LogIf(ctx, err)
 			return 0, err
 		}
 	}
@@ -133,7 +133,7 @@ func newBitrotReader(disk StorageAPI, bucket string, filePath string, tillOffset
 // Close all the readers.
 func closeBitrotReaders(rs []io.ReaderAt) {
 	for _, r := range rs {
-		if br, ok := r.(*streamingBitrotReader); ok {
+		if br, ok := r.(io.Closer); ok {
 			br.Close()
 		}
 	}
@@ -142,7 +142,7 @@ func closeBitrotReaders(rs []io.ReaderAt) {
 // Close all the writers.
 func closeBitrotWriters(ws []io.Writer) {
 	for _, w := range ws {
-		if bw, ok := w.(*streamingBitrotWriter); ok {
+		if bw, ok := w.(io.Closer); ok {
 			bw.Close()
 		}
 	}
@@ -22,7 +22,6 @@ import (
 	"encoding/xml"
 	"fmt"
 	"io"
-	"net"
 	"net/http"
 	"net/url"
 	"path"
@@ -226,7 +225,7 @@ func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.R
 				continue
 			}
 			bucketsInfo = append(bucketsInfo, BucketInfo{
-				Name:    strings.Trim(dnsRecord.Key, slashSeparator),
+				Name:    dnsRecord.Key,
 				Created: dnsRecord.CreationDate,
 			})
 			bucketSet.Add(dnsRecord.Key)
@@ -371,13 +370,6 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 	// Write success response.
 	writeSuccessResponseXML(w, encodedSuccessResponse)

-	// Get host and port from Request.RemoteAddr failing which
-	// fill them with empty strings.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	// Notify deleted event for objects.
 	for _, dobj := range deletedObjects {
 		sendEvent(eventArgs{
@@ -389,8 +381,7 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 			ReqParams:    extractReqParams(r),
 			RespElements: extractRespElements(w),
 			UserAgent:    r.UserAgent(),
-			Host:         host,
-			Port:         port,
+			Host:         handlers.GetSourceIP(r),
 		})
 	}
 }
@@ -681,12 +672,6 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 	w.Header().Set("ETag", `"`+objInfo.ETag+`"`)
 	w.Header().Set("Location", location)

-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	// Notify object created event.
 	defer sendEvent(eventArgs{
 		EventName:    event.ObjectCreatedPost,
@@ -695,8 +680,7 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})

 	if successRedirect != "" {
@@ -332,7 +332,7 @@ func (cfs *cacheFSObjects) PutObject(ctx context.Context, bucket string, object
 	if isObjectDir(object, data.Size()) {
 		// Check if an object is present as one of the parent dir.
 		if fs.parentDirIsObject(ctx, bucket, path.Dir(object)) {
-			return ObjectInfo{}, toObjectErr(errFileAccessDenied, bucket, object)
+			return ObjectInfo{}, toObjectErr(errFileParentIsFile, bucket, object)
 		}
 		if err = mkdirAll(pathJoin(fs.fsPath, bucket, object), 0777); err != nil {
 			return ObjectInfo{}, toObjectErr(err, bucket, object)
@@ -350,7 +350,7 @@ func (cfs *cacheFSObjects) PutObject(ctx context.Context, bucket string, object

 	// Check if an object is present as one of the parent dir.
 	if fs.parentDirIsObject(ctx, bucket, path.Dir(object)) {
-		return ObjectInfo{}, toObjectErr(errFileAccessDenied, bucket, object)
+		return ObjectInfo{}, toObjectErr(errFileParentIsFile, bucket, object)
 	}

 	// Validate input data size and it can never be less than zero.
@@ -423,7 +423,7 @@ func (c cacheObjects) listCacheObjects(ctx context.Context, bucket, prefix, mark
 	if delimiter == slashSeparator {
 		recursive = false
 	}
-	walkResultCh, endWalkCh := c.listPool.Release(listParams{bucket, recursive, marker, prefix, false})
+	walkResultCh, endWalkCh := c.listPool.Release(listParams{bucket, recursive, marker, prefix})
 	if walkResultCh == nil {
 		endWalkCh = make(chan struct{})
 		isLeaf := func(bucket, object string) bool {
@@ -495,7 +495,7 @@ func (c cacheObjects) listCacheObjects(ctx context.Context, bucket, prefix, mark
 		}
 	}

-	params := listParams{bucket, recursive, nextMarker, prefix, false}
+	params := listParams{bucket, recursive, nextMarker, prefix}
 	if !eof {
 		c.listPool.Set(params, walkResultCh, endWalkCh)
 	}
@@ -487,7 +487,7 @@ func (fs *FSObjects) CompleteMultipartUpload(ctx context.Context, bucket string,

 	// Check if an object is present as one of the parent dir.
 	if fs.parentDirIsObject(ctx, bucket, pathutil.Dir(object)) {
-		return oi, toObjectErr(errFileAccessDenied, bucket, object)
+		return oi, toObjectErr(errFileParentIsFile, bucket, object)
 	}

 	if _, err := fs.statBucketDir(ctx, bucket); err != nil {
@@ -839,8 +839,7 @@ func (fs *FSObjects) putObject(ctx context.Context, bucket string, object string
 	if isObjectDir(object, data.Size()) {
 		// Check if an object is present as one of the parent dir.
 		if fs.parentDirIsObject(ctx, bucket, path.Dir(object)) {
-			logger.LogIf(ctx, errFileAccessDenied)
-			return ObjectInfo{}, toObjectErr(errFileAccessDenied, bucket, object)
+			return ObjectInfo{}, toObjectErr(errFileParentIsFile, bucket, object)
 		}
 		if err = mkdirAll(pathJoin(fs.fsPath, bucket, object), 0777); err != nil {
 			logger.LogIf(ctx, err)
@@ -859,8 +858,7 @@ func (fs *FSObjects) putObject(ctx context.Context, bucket string, object string

 	// Check if an object is present as one of the parent dir.
 	if fs.parentDirIsObject(ctx, bucket, path.Dir(object)) {
-		logger.LogIf(ctx, errFileAccessDenied)
-		return ObjectInfo{}, toObjectErr(errFileAccessDenied, bucket, object)
+		return ObjectInfo{}, toObjectErr(errFileParentIsFile, bucket, object)
 	}

 	// Validate input data size and it can never be less than zero.
@@ -1148,8 +1146,7 @@ func (fs *FSObjects) ListObjects(ctx context.Context, bucket, prefix, marker, de
 		return fs.getObjectInfo(ctx, bucket, entry)
 	}

-	heal := false // true only for xl.ListObjectsHeal()
-	walkResultCh, endWalkCh := fs.listPool.Release(listParams{bucket, recursive, marker, prefix, heal})
+	walkResultCh, endWalkCh := fs.listPool.Release(listParams{bucket, recursive, marker, prefix})
 	if walkResultCh == nil {
 		endWalkCh = make(chan struct{})
 		isLeaf := func(bucket, object string) bool {
@@ -1203,7 +1200,7 @@ func (fs *FSObjects) ListObjects(ctx context.Context, bucket, prefix, marker, de
 	}

 	// Save list routine for the next marker if we haven't reached EOF.
-	params := listParams{bucket, recursive, nextMarker, prefix, heal}
+	params := listParams{bucket, recursive, nextMarker, prefix}
 	if !eof {
 		fs.listPool.Set(params, walkResultCh, endWalkCh)
 	}
@@ -1241,7 +1238,7 @@ func (fs *FSObjects) HealFormat(ctx context.Context, dryRun bool) (madmin.HealRe
 }

 // HealObject - no-op for fs. Valid only for XL.
-func (fs *FSObjects) HealObject(ctx context.Context, bucket, object string, dryRun, remove bool) (
+func (fs *FSObjects) HealObject(ctx context.Context, bucket, object string, dryRun, remove bool, scanMode madmin.HealScanMode) (
 	res madmin.HealResultItem, err error) {
 	logger.LogIf(ctx, NotImplemented{})
 	return res, NotImplemented{}
@@ -1254,10 +1251,10 @@ func (fs *FSObjects) HealBucket(ctx context.Context, bucket string, dryRun, remo
 	return madmin.HealResultItem{}, NotImplemented{}
 }

-// ListObjectsHeal - list all objects to be healed. Valid only for XL
-func (fs *FSObjects) ListObjectsHeal(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (loi ListObjectsInfo, e error) {
+// HealObjects - no-op for fs. Valid only for XL.
+func (fs *FSObjects) HealObjects(ctx context.Context, bucket, prefix string, fn func(string, string) error) (e error) {
 	logger.LogIf(ctx, NotImplemented{})
-	return loi, NotImplemented{}
+	return NotImplemented{}
 }

 // ListBucketsHeal - list all buckets to be healed. Valid only for XL
@@ -22,6 +22,8 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/minio/minio/pkg/madmin"
 )

 // Tests for if parent directory is object
@@ -228,8 +230,8 @@ func TestFSPutObject(t *testing.T) {
 	if err == nil {
 		t.Fatal("Unexpected should fail here, backend corruption occurred")
 	}
-	if nerr, ok := err.(PrefixAccessDenied); !ok {
-		t.Fatalf("Expected PrefixAccessDenied, got %#v", err)
+	if nerr, ok := err.(ParentIsObject); !ok {
+		t.Fatalf("Expected ParentIsObject, got %#v", err)
 	} else {
 		if nerr.Bucket != "bucket" {
 			t.Fatalf("Expected 'bucket', got %s", nerr.Bucket)
@@ -243,8 +245,8 @@ func TestFSPutObject(t *testing.T) {
 	if err == nil {
 		t.Fatal("Unexpected should fail here, backned corruption occurred")
 	}
-	if nerr, ok := err.(PrefixAccessDenied); !ok {
-		t.Fatalf("Expected PrefixAccessDenied, got %#v", err)
+	if nerr, ok := err.(ParentIsObject); !ok {
+		t.Fatalf("Expected ParentIsObject, got %#v", err)
 	} else {
 		if nerr.Bucket != "bucket" {
 			t.Fatalf("Expected 'bucket', got %s", nerr.Bucket)
@@ -390,19 +392,19 @@ func TestFSHealObject(t *testing.T) {
 	defer os.RemoveAll(disk)

 	obj := initFSObjects(disk, t)
-	_, err := obj.HealObject(context.Background(), "bucket", "object", false, false)
+	_, err := obj.HealObject(context.Background(), "bucket", "object", false, false, madmin.HealDeepScan)
 	if err == nil || !isSameType(err, NotImplemented{}) {
 		t.Fatalf("Heal Object should return NotImplemented error ")
 	}
 }

-// TestFSListObjectHeal - tests for fs ListObjectHeals
-func TestFSListObjectsHeal(t *testing.T) {
+// TestFSHealObjects - tests for fs HealObjects to return not implemented.
+func TestFSHealObjects(t *testing.T) {
 	disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
 	defer os.RemoveAll(disk)

 	obj := initFSObjects(disk, t)
-	_, err := obj.ListObjectsHeal(context.Background(), "bucket", "prefix", "marker", "delimiter", 1000)
+	err := obj.HealObjects(context.Background(), "bucket", "prefix", nil)
 	if err == nil || !isSameType(err, NotImplemented{}) {
 		t.Fatalf("Heal Object should return NotImplemented error ")
 	}
@@ -102,7 +102,7 @@ func (a GatewayUnsupported) ListBucketsHeal(ctx context.Context) (buckets []Buck
 }

 // HealObject - Not implemented stub
-func (a GatewayUnsupported) HealObject(ctx context.Context, bucket, object string, dryRun, remove bool) (h madmin.HealResultItem, e error) {
+func (a GatewayUnsupported) HealObject(ctx context.Context, bucket, object string, dryRun, remove bool, scanMode madmin.HealScanMode) (h madmin.HealResultItem, e error) {
 	return h, NotImplemented{}
 }

@@ -111,9 +111,9 @@ func (a GatewayUnsupported) ListObjectsV2(ctx context.Context, bucket, prefix, c
 	return result, NotImplemented{}
 }

-// ListObjectsHeal - Not implemented stub
-func (a GatewayUnsupported) ListObjectsHeal(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (loi ListObjectsInfo, e error) {
-	return loi, NotImplemented{}
+// HealObjects - Not implemented stub
+func (a GatewayUnsupported) HealObjects(ctx context.Context, bucket, prefix string, fn func(string, string) error) (e error) {
+	return NotImplemented{}
 }

 // CopyObject copies a blob from source container to destination container.
@@ -564,12 +564,35 @@ func (a *azureObjects) ListObjects(ctx context.Context, bucket, prefix, marker,
 				// skip all the entries till we reach the marker.
 				continue
 			}
+			// Populate correct ETag's if possible, this code primarily exists
+			// because AWS S3 indicates that
+			//
+			// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTCommonResponseHeaders.html
+			//
+			// Objects created by the PUT Object, POST Object, or Copy operation,
+			// or through the AWS Management Console, and are encrypted by SSE-S3
+			// or plaintext, have ETags that are an MD5 digest of their object data.
+			//
+			// Some applications depend on this behavior refer https://github.com/minio/minio/issues/6550
+			// So we handle it here and make this consistent.
+			etag := minio.ToS3ETag(blob.Properties.Etag)
+			switch {
+			case blob.Properties.ContentMD5 != "":
+				b, err := base64.StdEncoding.DecodeString(blob.Properties.ContentMD5)
+				if err == nil {
+					etag = hex.EncodeToString(b)
+				}
+			case blob.Metadata["md5sum"] != "":
+				etag = blob.Metadata["md5sum"]
+				delete(blob.Metadata, "md5sum")
+			}
+
 			objects = append(objects, minio.ObjectInfo{
 				Bucket:          bucket,
 				Name:            blob.Name,
 				ModTime:         time.Time(blob.Properties.LastModified),
 				Size:            blob.Properties.ContentLength,
-				ETag:            minio.ToS3ETag(blob.Properties.Etag),
+				ETag:            etag,
 				ContentType:     blob.Properties.ContentType,
 				ContentEncoding: blob.Properties.ContentEncoding,
 			})
@@ -182,7 +182,7 @@ func appendS3MetaToOSSOptions(ctx context.Context, opts []oss.Option, s3Metadata
 		case k == "X-Amz-Acl":
 			// Valid values: public-read, private, and public-read-write
 			opts = append(opts, oss.ObjectACL(oss.ACLType(v)))
-		case k == "X-Amz-Server-Side-Encryption":
+		case k == "X-Amz-Server-Side-Encryption":
 			opts = append(opts, oss.ServerSideEncryption(v))
 		case k == "X-Amz-Copy-Source-If-Match":
 			opts = append(opts, oss.CopySourceIfMatch(v))
@@ -57,7 +57,6 @@ const (
 	globalMinioDefaultStorageClass = "STANDARD"
 	globalWindowsOSName            = "windows"
 	globalNetBSDOSName             = "netbsd"
-	globalSolarisOSName            = "solaris"
 	globalMinioModeFS              = "mode-server-fs"
 	globalMinioModeXL              = "mode-server-xl"
 	globalMinioModeDistXL          = "mode-server-distributed-xl"
@@ -79,7 +78,7 @@ const (
 	globalMaxSkewTime = 15 * time.Minute // 15 minutes skew allowed.

 	// GlobalMultipartExpiry - Expiry duration after which the multipart uploads are deemed stale.
-	GlobalMultipartExpiry = time.Hour * 24 * 14 // 2 weeks.
+	GlobalMultipartExpiry = time.Hour * 24 * 3 // 3 days.
 	// GlobalMultipartCleanupInterval - Cleanup interval when the stale multipart cleanup is initiated.
 	GlobalMultipartCleanupInterval = time.Hour * 24 // 24 hrs.

@@ -25,6 +25,8 @@ import (
 	"time"

 	humanize "github.com/dustin/go-humanize"
+	"golang.org/x/net/http2"
+
 	"github.com/minio/minio-go/pkg/set"
 	"github.com/minio/minio/pkg/certs"
 )
@@ -46,17 +48,22 @@ const (

 	// DefaultMaxHeaderBytes - default maximum HTTP header size in bytes.
 	DefaultMaxHeaderBytes = 1 * humanize.MiByte
+
+	// DefaultHTTP2MaxConcurrentStreams - default value for HTTP 2.0 maximum concurrent streams allowed.
+	DefaultHTTP2MaxConcurrentStreams = 1024
 )

 // Server - extended http.Server supports multiple addresses to serve and enhanced connection handling.
 type Server struct {
 	http.Server
 	Addrs                  []string      // addresses on which the server listens for new connection.
+	ReadTimeout            time.Duration // timeout used for net.Conn.Read() deadlines.
+	WriteTimeout           time.Duration // timeout used for net.Conn.Write() deadlines.
 	ShutdownTimeout        time.Duration // timeout used for graceful server shutdown.
 	TCPKeepAliveTimeout    time.Duration // timeout used for underneath TCP connection.
 	UpdateBytesReadFunc    func(int)     // function to be called to update bytes read in bufConn.
 	UpdateBytesWrittenFunc func(int)     // function to be called to update bytes written in bufConn.
-	listenerMutex          *sync.Mutex   // to guard 'listener' field.
+	listenerMutex          sync.Mutex    // to guard 'listener' field.
 	listener               *httpListener // HTTP listener for all 'Addrs' field.
 	inShutdown             uint32        // indicates whether the server is in shutdown or not
 	requestCount           int32         // counter holds no. of request in progress.
@@ -120,6 +127,11 @@ func (srv *Server) Start() (err error) {

 	// Start servicing with listener.
 	if tlsConfig != nil {
+		if err = http2.ConfigureServer(&srv.Server, &http2.Server{
+			MaxConcurrentStreams: DefaultHTTP2MaxConcurrentStreams,
+		}); err != nil {
+			return err
+		}
 		return srv.Server.Serve(tls.NewListener(listener, tlsConfig))
 	}
 	return srv.Server.Serve(listener)
@@ -202,7 +214,6 @@ func NewServer(addrs []string, handler http.Handler, getCert certs.GetCertificat
 		Addrs:               addrs,
 		ShutdownTimeout:     DefaultShutdownTimeout,
 		TCPKeepAliveTimeout: DefaultTCPKeepAliveTimeout,
-		listenerMutex:       &sync.Mutex{},
 	}
 	httpServer.Handler = handler
 	httpServer.TLSConfig = tlsConfig
@@ -77,10 +77,6 @@ func TestNewServer(t *testing.T) {
 			t.Fatalf("Case %v: server.TCPKeepAliveTimeout: expected: %v, got: %v", (i + 1), DefaultTCPKeepAliveTimeout, server.TCPKeepAliveTimeout)
 		}

-		if server.listenerMutex == nil {
-			t.Fatalf("Case %v: server.listenerMutex: expected: <non-nil>, got: <nil>", (i + 1))
-		}
-
 		if server.ReadTimeout != DefaultReadTimeout {
 			t.Fatalf("Case %v: server.ReadTimeout: expected: %v, got: %v", (i + 1), DefaultReadTimeout, server.ReadTimeout)
 		}
@@ -343,7 +343,7 @@ func logIf(ctx context.Context, err error) {
 		entry.API.Args.Bucket = hashString(entry.API.Args.Bucket)
 		entry.API.Args.Object = hashString(entry.API.Args.Object)
 		entry.RemoteHost = hashString(entry.RemoteHost)
-		entry.Message = reflect.TypeOf(err).String()
+		entry.Trace.Message = reflect.TypeOf(err).String()
 		entry.Trace.Variables = make(map[string]string)
 	}

@@ -43,7 +43,7 @@ type NotificationSys struct {
 	targetList                 *event.TargetList
 	bucketRulesMap             map[string]event.RulesMap
 	bucketRemoteTargetRulesMap map[string]map[event.TargetID]event.RulesMap
-	peerRPCClientMap           map[xnet.Host]*PeerRPCClient
+	peerClients                []*peerRESTClient
 }

 // GetARNList - returns available ARNs.
@@ -63,11 +63,6 @@ func (sys *NotificationSys) GetARNList() []string {
 	return arns
 }

-// GetPeerRPCClient - returns PeerRPCClient of addr.
-func (sys *NotificationSys) GetPeerRPCClient(addr xnet.Host) *PeerRPCClient {
-	return sys.peerRPCClientMap[addr]
-}
-
 // NotificationPeerErr returns error associated for a remote peer.
 type NotificationPeerErr struct {
 	Host xnet.Host // Remote host on which the rpc call was initiated
@@ -78,15 +73,15 @@ type NotificationPeerErr struct {
 func (sys *NotificationSys) DeleteBucket(ctx context.Context, bucketName string) {
 	go func() {
 		var wg sync.WaitGroup
-		for addr, client := range sys.peerRPCClientMap {
+		for _, client := range sys.peerClients {
 			wg.Add(1)
-			go func(addr xnet.Host, client *PeerRPCClient) {
+			go func(client *peerRESTClient) {
 				defer wg.Done()
 				if err := client.DeleteBucket(bucketName); err != nil {
-					logger.GetReqInfo(ctx).AppendTags("remotePeer", addr.Name)
+					logger.GetReqInfo(ctx).AppendTags("remotePeer", client.host.Name)
 					logger.LogIf(ctx, err)
 				}
-			}(addr, client)
+			}(client)
 		}
 		wg.Wait()
 	}()
@@ -146,52 +141,45 @@ func (g *NotificationGroup) Go(ctx context.Context, f func() error, index int, a
 	}()
 }

-// ReloadFormat - calls ReloadFormat RPC call on all peers.
+// ReloadFormat - calls ReloadFormat REST call on all peers.
 func (sys *NotificationSys) ReloadFormat(dryRun bool) []NotificationPeerErr {
-	var idx = 0
-	ng := WithNPeers(len(sys.peerRPCClientMap))
-	for addr, client := range sys.peerRPCClientMap {
+	ng := WithNPeers(len(sys.peerClients))
+	for idx, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
 		client := client
 		ng.Go(context.Background(), func() error {
 			return client.ReloadFormat(dryRun)
-		}, idx, addr)
-		idx++
+		}, idx, *client.host)
 	}
 	return ng.Wait()
 }

 // LoadUsers - calls LoadUsers RPC call on all peers.
 func (sys *NotificationSys) LoadUsers() []NotificationPeerErr {
-	var idx = 0
-	ng := WithNPeers(len(sys.peerRPCClientMap))
-	for addr, client := range sys.peerRPCClientMap {
-		ng.Go(context.Background(), client.LoadUsers, idx, addr)
-		idx++
-	}
-	return ng.Wait()
-}
-
-// LoadCredentials - calls LoadCredentials RPC call on all peers.
-func (sys *NotificationSys) LoadCredentials() []NotificationPeerErr {
-	var idx = 0
-	ng := WithNPeers(len(sys.peerRPCClientMap))
-	for addr, client := range sys.peerRPCClientMap {
-		ng.Go(context.Background(), client.LoadCredentials, idx, addr)
-		idx++
+	ng := WithNPeers(len(sys.peerClients))
+	for idx, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
+		client := client
+		ng.Go(context.Background(), client.LoadUsers, idx, *client.host)
 	}
 	return ng.Wait()
 }

 // StartProfiling - start profiling on remote peers, by initiating a remote RPC.
 func (sys *NotificationSys) StartProfiling(profiler string) []NotificationPeerErr {
-	var idx = 0
-	ng := WithNPeers(len(sys.peerRPCClientMap))
-	for addr, client := range sys.peerRPCClientMap {
+	ng := WithNPeers(len(sys.peerClients))
+	for idx, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
 		client := client
 		ng.Go(context.Background(), func() error {
 			return client.StartProfiling(profiler)
-		}, idx, addr)
-		idx++
+		}, idx, *client.host)
 	}
 	return ng.Wait()
 }
@@ -205,10 +193,13 @@ func (sys *NotificationSys) DownloadProfilingData(ctx context.Context, writer io
 	zipWriter := zip.NewWriter(writer)
 	defer zipWriter.Close()

-	for addr, client := range sys.peerRPCClientMap {
-		data, err := client.DownloadProfilingData()
+	for _, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
+		data, err := client.DownloadProfileData()
 		if err != nil {
-			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", addr.String())
+			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", client.host.String())
 			ctx := logger.SetReqInfo(ctx, reqInfo)
 			logger.LogIf(ctx, err)
 			continue
@@ -218,7 +209,7 @@ func (sys *NotificationSys) DownloadProfilingData(ctx context.Context, writer io

 		// Send profiling data to zip as file
 		header, zerr := zip.FileInfoHeader(dummyFileInfo{
-			name:    fmt.Sprintf("profiling-%s.pprof", addr),
+			name:    fmt.Sprintf("profiling-%s.pprof", client.host.String()),
 			size:    int64(len(data)),
 			mode:    0600,
 			modTime: UTCNow(),
@@ -226,20 +217,20 @@ func (sys *NotificationSys) DownloadProfilingData(ctx context.Context, writer io
 			sys:     nil,
 		})
 		if zerr != nil {
-			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", addr.String())
+			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", client.host.String())
 			ctx := logger.SetReqInfo(ctx, reqInfo)
 			logger.LogIf(ctx, zerr)
 			continue
 		}
 		zwriter, zerr := zipWriter.CreateHeader(header)
 		if zerr != nil {
-			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", addr.String())
+			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", client.host.String())
 			ctx := logger.SetReqInfo(ctx, reqInfo)
 			logger.LogIf(ctx, zerr)
 			continue
 		}
 		if _, err = io.Copy(zwriter, bytes.NewBuffer(data)); err != nil {
-			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", addr.String())
+			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", client.host.String())
 			ctx := logger.SetReqInfo(ctx, reqInfo)
 			logger.LogIf(ctx, err)
 			continue
@@ -289,45 +280,48 @@ func (sys *NotificationSys) DownloadProfilingData(ctx context.Context, writer io

 // SignalService - calls signal service RPC call on all peers.
 func (sys *NotificationSys) SignalService(sig serviceSignal) []NotificationPeerErr {
-	var idx = 0
-	ng := WithNPeers(len(sys.peerRPCClientMap))
-	for addr, client := range sys.peerRPCClientMap {
+	ng := WithNPeers(len(sys.peerClients))
+	for idx, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
 		client := client
 		ng.Go(context.Background(), func() error {
 			return client.SignalService(sig)
-		}, idx, addr)
-		idx++
+		}, idx, *client.host)
 	}
 	return ng.Wait()
 }

 // ServerInfo - calls ServerInfo RPC call on all peers.
 func (sys *NotificationSys) ServerInfo(ctx context.Context) []ServerInfo {
-	var idx = 0
-	serverInfo := make([]ServerInfo, len(sys.peerRPCClientMap))
+	serverInfo := make([]ServerInfo, len(sys.peerClients))
 	var wg sync.WaitGroup
-	for addr, client := range sys.peerRPCClientMap {
+	for index, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
 		wg.Add(1)
-		go func(idx int, addr xnet.Host, client *PeerRPCClient) {
+		go func(idx int, client *peerRESTClient) {
 			defer wg.Done()
 			// Try to fetch serverInfo remotely in three attempts.
 			for i := 0; i < 3; i++ {
 				info, err := client.ServerInfo()
 				if err == nil {
 					serverInfo[idx] = ServerInfo{
-						Addr: addr.String(),
+						Addr: client.host.String(),
 						Data: &info,
 					}
 					return
 				}
 				serverInfo[idx] = ServerInfo{
-					Addr:  addr.String(),
+					Addr:  client.host.String(),
 					Data:  &info,
 					Error: err.Error(),
 				}
 				// Last iteration log the error.
 				if i == 2 {
-					reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", addr.String())
+					reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", client.host.String())
 					ctx := logger.SetReqInfo(ctx, reqInfo)
 					logger.LogIf(ctx, err)
 				}
@@ -336,8 +330,7 @@ func (sys *NotificationSys) ServerInfo(ctx context.Context) []ServerInfo {
 					time.Sleep(1 * time.Second)
 				}
 			}
-		}(idx, addr, client)
-		idx++
+		}(index, client)
 	}
 	wg.Wait()
 	return serverInfo
@@ -345,19 +338,22 @@ func (sys *NotificationSys) ServerInfo(ctx context.Context) []ServerInfo {

 // GetLocks - makes GetLocks RPC call on all peers.
 func (sys *NotificationSys) GetLocks(ctx context.Context) []*PeerLocks {
-	var idx = 0
-	locksResp := make([]*PeerLocks, len(sys.peerRPCClientMap))
+
+	locksResp := make([]*PeerLocks, len(sys.peerClients))
 	var wg sync.WaitGroup
-	for addr, client := range sys.peerRPCClientMap {
+	for index, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
 		wg.Add(1)
-		go func(idx int, addr xnet.Host, client *PeerRPCClient) {
+		go func(idx int, client *peerRESTClient) {
 			defer wg.Done()
 			// Try to fetch serverInfo remotely in three attempts.
 			for i := 0; i < 3; i++ {
 				serverLocksResp, err := client.GetLocks()
 				if err == nil {
 					locksResp[idx] = &PeerLocks{
-						Addr:  addr.String(),
+						Addr:  client.host.String(),
 						Locks: serverLocksResp,
 					}
 					return
@@ -365,17 +361,16 @@ func (sys *NotificationSys) GetLocks(ctx context.Context) []*PeerLocks {

 				// Last iteration log the error.
 				if i == 2 {
-					reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", addr.String())
+					reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", client.host.String())
 					ctx := logger.SetReqInfo(ctx, reqInfo)
-					logger.LogOnceIf(ctx, err, addr.String())
+					logger.LogOnceIf(ctx, err, client.host.String())
 				}
 				// Wait for one second and no need wait after last attempt.
 				if i < 2 {
 					time.Sleep(1 * time.Second)
 				}
 			}
-		}(idx, addr, client)
-		idx++
+		}(index, client)
 	}
 	wg.Wait()
 	return locksResp
@@ -385,15 +380,18 @@ func (sys *NotificationSys) GetLocks(ctx context.Context) []*PeerLocks {
 func (sys *NotificationSys) SetBucketPolicy(ctx context.Context, bucketName string, bucketPolicy *policy.Policy) {
 	go func() {
 		var wg sync.WaitGroup
-		for addr, client := range sys.peerRPCClientMap {
+		for _, client := range sys.peerClients {
+			if client == nil {
+				continue
+			}
 			wg.Add(1)
-			go func(addr xnet.Host, client *PeerRPCClient) {
+			go func(client *peerRESTClient) {
 				defer wg.Done()
 				if err := client.SetBucketPolicy(bucketName, bucketPolicy); err != nil {
-					logger.GetReqInfo(ctx).AppendTags("remotePeer", addr.Name)
+					logger.GetReqInfo(ctx).AppendTags("remotePeer", client.host.Name)
 					logger.LogIf(ctx, err)
 				}
-			}(addr, client)
+			}(client)
 		}
 		wg.Wait()
 	}()
@@ -403,15 +401,18 @@ func (sys *NotificationSys) SetBucketPolicy(ctx context.Context, bucketName stri
 func (sys *NotificationSys) RemoveBucketPolicy(ctx context.Context, bucketName string) {
 	go func() {
 		var wg sync.WaitGroup
-		for addr, client := range sys.peerRPCClientMap {
+		for _, client := range sys.peerClients {
+			if client == nil {
+				continue
+			}
 			wg.Add(1)
-			go func(addr xnet.Host, client *PeerRPCClient) {
+			go func(client *peerRESTClient) {
 				defer wg.Done()
 				if err := client.RemoveBucketPolicy(bucketName); err != nil {
-					logger.GetReqInfo(ctx).AppendTags("remotePeer", addr.Name)
+					logger.GetReqInfo(ctx).AppendTags("remotePeer", client.host.Name)
 					logger.LogIf(ctx, err)
 				}
-			}(addr, client)
+			}(client)
 		}
 		wg.Wait()
 	}()
@@ -421,15 +422,18 @@ func (sys *NotificationSys) RemoveBucketPolicy(ctx context.Context, bucketName s
 func (sys *NotificationSys) PutBucketNotification(ctx context.Context, bucketName string, rulesMap event.RulesMap) {
 	go func() {
 		var wg sync.WaitGroup
-		for addr, client := range sys.peerRPCClientMap {
+		for _, client := range sys.peerClients {
+			if client == nil {
+				continue
+			}
 			wg.Add(1)
-			go func(addr xnet.Host, client *PeerRPCClient, rulesMap event.RulesMap) {
+			go func(client *peerRESTClient, rulesMap event.RulesMap) {
 				defer wg.Done()
 				if err := client.PutBucketNotification(bucketName, rulesMap); err != nil {
-					logger.GetReqInfo(ctx).AppendTags("remotePeer", addr.Name)
+					logger.GetReqInfo(ctx).AppendTags("remotePeer", client.host.Name)
 					logger.LogIf(ctx, err)
 				}
-			}(addr, client, rulesMap.Clone())
+			}(client, rulesMap.Clone())
 		}
 		wg.Wait()
 	}()
@@ -440,15 +444,18 @@ func (sys *NotificationSys) ListenBucketNotification(ctx context.Context, bucket
 	targetID event.TargetID, localPeer xnet.Host) {
 	go func() {
 		var wg sync.WaitGroup
-		for addr, client := range sys.peerRPCClientMap {
+		for _, client := range sys.peerClients {
+			if client == nil {
+				continue
+			}
 			wg.Add(1)
-			go func(addr xnet.Host, client *PeerRPCClient) {
+			go func(client *peerRESTClient) {
 				defer wg.Done()
 				if err := client.ListenBucketNotification(bucketName, eventNames, pattern, targetID, localPeer); err != nil {
-					logger.GetReqInfo(ctx).AppendTags("remotePeer", addr.Name)
+					logger.GetReqInfo(ctx).AppendTags("remotePeer", client.host.Name)
 					logger.LogIf(ctx, err)
 				}
-			}(addr, client)
+			}(client)
 		}
 		wg.Wait()
 	}()
@@ -492,7 +499,17 @@ func (sys *NotificationSys) RemoteTargetExist(bucketName string, targetID event.
 	return ok
 }

-// initListeners - initializes PeerRPC clients available in listener.json.
+// ListenBucketNotificationArgs - listen bucket notification RPC arguments.
+type ListenBucketNotificationArgs struct {
+	AuthArgs   `json:"-"`
+	BucketName string         `json:"-"`
+	EventNames []event.Name   `json:"eventNames"`
+	Pattern    string         `json:"pattern"`
+	TargetID   event.TargetID `json:"targetId"`
+	Addr       xnet.Host      `json:"addr"`
+}
+
+// initListeners - initializes PeerREST clients available in listener.json.
 func (sys *NotificationSys) initListeners(ctx context.Context, objAPI ObjectLayer, bucketName string) error {
 	// listener.json is available/applicable only in DistXL mode.
 	if !globalIsDistXL {
@@ -542,12 +559,12 @@ func (sys *NotificationSys) initListeners(ctx context.Context, objAPI ObjectLaye
 			continue
 		}

-		rpcClient := sys.GetPeerRPCClient(args.Addr)
-		if rpcClient == nil {
-			return fmt.Errorf("unable to find PeerRPCClient by address %v in listener.json for bucket %v", args.Addr, bucketName)
+		client, err := newPeerRESTClient(&args.Addr)
+		if err != nil {
+			return fmt.Errorf("unable to find PeerHost by address %v in listener.json for bucket %v", args.Addr, bucketName)
 		}

-		exist, err := rpcClient.RemoteTargetExist(bucketName, args.TargetID)
+		exist, err := client.RemoteTargetExist(bucketName, args.TargetID)
 		if err != nil {
 			logger.GetReqInfo(ctx).AppendTags("targetID", args.TargetID.Name)
 			logger.LogIf(ctx, err)
@@ -558,7 +575,7 @@ func (sys *NotificationSys) initListeners(ctx context.Context, objAPI ObjectLaye
 			continue
 		}

-		target := NewPeerRPCClientTarget(bucketName, args.TargetID, rpcClient)
+		target := NewPeerRESTClientTarget(bucketName, args.TargetID, client)
 		rulesMap := event.NewRulesMap(args.EventNames, args.Pattern, target.ID())
 		if err = sys.AddRemoteTarget(bucketName, target, rulesMap); err != nil {
 			logger.GetReqInfo(ctx).AppendTags("targetName", target.id.Name)
@@ -721,24 +738,25 @@ func (sys *NotificationSys) Send(args eventArgs) []event.TargetIDErr {

 // DrivePerfInfo - Drive speed (read and write) information
 func (sys *NotificationSys) DrivePerfInfo() []ServerDrivesPerfInfo {
-	reply := make([]ServerDrivesPerfInfo, len(sys.peerRPCClientMap))
+	reply := make([]ServerDrivesPerfInfo, len(sys.peerClients))
 	var wg sync.WaitGroup
-	var i int
-	for addr, client := range sys.peerRPCClientMap {
+	for i, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
 		wg.Add(1)
-		go func(addr xnet.Host, client *PeerRPCClient, idx int) {
+		go func(client *peerRESTClient, idx int) {
 			defer wg.Done()
 			di, err := client.DrivePerfInfo()
 			if err != nil {
-				reqInfo := (&logger.ReqInfo{}).AppendTags("remotePeer", addr.String())
+				reqInfo := (&logger.ReqInfo{}).AppendTags("remotePeer", client.host.String())
 				ctx := logger.SetReqInfo(context.Background(), reqInfo)
 				logger.LogIf(ctx, err)
-				di.Addr = addr.String()
+				di.Addr = client.host.String()
 				di.Error = err.Error()
 			}
 			reply[idx] = di
-		}(addr, client, i)
-		i++
+		}(client, i)
 	}
 	wg.Wait()
 	return reply
@@ -746,24 +764,25 @@ func (sys *NotificationSys) DrivePerfInfo() []ServerDrivesPerfInfo {

 // MemUsageInfo - Mem utilization information
 func (sys *NotificationSys) MemUsageInfo() []ServerMemUsageInfo {
-	reply := make([]ServerMemUsageInfo, len(sys.peerRPCClientMap))
+	reply := make([]ServerMemUsageInfo, len(sys.peerClients))
 	var wg sync.WaitGroup
-	var i int
-	for addr, client := range sys.peerRPCClientMap {
+	for i, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
 		wg.Add(1)
-		go func(addr xnet.Host, client *PeerRPCClient, idx int) {
+		go func(client *peerRESTClient, idx int) {
 			defer wg.Done()
 			memi, err := client.MemUsageInfo()
 			if err != nil {
-				reqInfo := (&logger.ReqInfo{}).AppendTags("remotePeer", addr.String())
+				reqInfo := (&logger.ReqInfo{}).AppendTags("remotePeer", client.host.String())
 				ctx := logger.SetReqInfo(context.Background(), reqInfo)
 				logger.LogIf(ctx, err)
-				memi.Addr = addr.String()
+				memi.Addr = client.host.String()
 				memi.Error = err.Error()
 			}
 			reply[idx] = memi
-		}(addr, client, i)
-		i++
+		}(client, i)
 	}
 	wg.Wait()
 	return reply
@@ -771,24 +790,25 @@ func (sys *NotificationSys) MemUsageInfo() []ServerMemUsageInfo {

 // CPULoadInfo - CPU utilization information
 func (sys *NotificationSys) CPULoadInfo() []ServerCPULoadInfo {
-	reply := make([]ServerCPULoadInfo, len(sys.peerRPCClientMap))
+	reply := make([]ServerCPULoadInfo, len(sys.peerClients))
 	var wg sync.WaitGroup
-	var i int
-	for addr, client := range sys.peerRPCClientMap {
+	for i, client := range sys.peerClients {
+		if client == nil {
+			continue
+		}
 		wg.Add(1)
-		go func(addr xnet.Host, client *PeerRPCClient, idx int) {
+		go func(client *peerRESTClient, idx int) {
 			defer wg.Done()
 			cpui, err := client.CPULoadInfo()
 			if err != nil {
-				reqInfo := (&logger.ReqInfo{}).AppendTags("remotePeer", addr.String())
+				reqInfo := (&logger.ReqInfo{}).AppendTags("remotePeer", client.host.String())
 				ctx := logger.SetReqInfo(context.Background(), reqInfo)
 				logger.LogIf(ctx, err)
-				cpui.Addr = addr.String()
+				cpui.Addr = client.host.String()
 				cpui.Error = err.Error()
 			}
 			reply[idx] = cpui
-		}(addr, client, i)
-		i++
+		}(client, i)
 	}
 	wg.Wait()
 	return reply
@@ -797,14 +817,18 @@ func (sys *NotificationSys) CPULoadInfo() []ServerCPULoadInfo {
 // NewNotificationSys - creates new notification system object.
 func NewNotificationSys(config *serverConfig, endpoints EndpointList) *NotificationSys {
 	targetList := getNotificationTargets(config)
-	peerRPCClientMap := makeRemoteRPCClients(endpoints)
+	remoteHosts := getRemoteHosts(endpoints)
+	remoteClients, err := getRestClients(remoteHosts)
+	if err != nil {
+		logger.FatalIf(err, "Unable to start notification sub system")
+	}

 	// bucketRulesMap/bucketRemoteTargetRulesMap are initialized by NotificationSys.Init()
 	return &NotificationSys{
 		targetList:                 targetList,
 		bucketRulesMap:             make(map[string]event.RulesMap),
 		bucketRemoteTargetRulesMap: make(map[string]map[event.TargetID]event.RulesMap),
-		peerRPCClientMap:           peerRPCClientMap,
+		peerClients:                remoteClients,
 	}
 }

@@ -815,7 +839,6 @@ type eventArgs struct {
 	ReqParams    map[string]string
 	RespElements map[string]string
 	Host         string
-	Port         string
 	UserAgent    string
 }

@@ -870,7 +893,6 @@ func (args eventArgs) ToEvent() event.Event {
 		},
 		Source: event.Source{
 			Host:      args.Host,
-			Port:      args.Port,
 			UserAgent: args.UserAgent,
 		},
 	}
@@ -19,6 +19,7 @@ package cmd
 import (
 	"fmt"
 	"io"
+	"path"
 )

 // Converts underlying storage error. Convenience function written to
@@ -47,6 +48,13 @@ func toObjectErr(err error, params ...string) error {
 				Object: params[1],
 			}
 		}
+	case errFileParentIsFile:
+		if len(params) >= 2 {
+			err = ParentIsObject{
+				Bucket: params[0],
+				Object: params[1],
+			}
+		}
 	case errIsNotRegular:
 		if len(params) >= 2 {
 			err = ObjectExistsAsDirectory{
@@ -182,6 +190,13 @@ func (e PrefixAccessDenied) Error() string {
 	return "Prefix access is denied: " + e.Bucket + "/" + e.Object
 }

+// ParentIsObject object access is denied.
+type ParentIsObject GenericError
+
+func (e ParentIsObject) Error() string {
+	return "Parent is object " + e.Bucket + "/" + path.Dir(e.Object)
+}
+
 // BucketExists bucket exists.
 type BucketExists GenericError

@@ -88,9 +88,9 @@ type ObjectLayer interface {
 	ReloadFormat(ctx context.Context, dryRun bool) error
 	HealFormat(ctx context.Context, dryRun bool) (madmin.HealResultItem, error)
 	HealBucket(ctx context.Context, bucket string, dryRun, remove bool) (madmin.HealResultItem, error)
-	HealObject(ctx context.Context, bucket, object string, dryRun, remove bool) (madmin.HealResultItem, error)
+	HealObject(ctx context.Context, bucket, object string, dryRun, remove bool, scanMode madmin.HealScanMode) (madmin.HealResultItem, error)
 	ListBucketsHeal(ctx context.Context) (buckets []BucketInfo, err error)
-	ListObjectsHeal(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (ListObjectsInfo, error)
+	HealObjects(ctx context.Context, bucket, prefix string, healObjectFn func(string, string) error) error

 	// Policy operations
 	SetBucketPolicy(context.Context, string, *policy.Policy) error
@@ -18,7 +18,6 @@ package cmd

 import (
 	"context"
-	"net"
 	"net/http"
 	"strings"
 	"time"
@@ -99,13 +98,14 @@ func checkCopyObjectPreconditions(ctx context.Context, w http.ResponseWriter, r
 		}
 	}

-	ssec := crypto.SSECopy.IsRequested(r.Header)
+	shouldDecryptEtag := crypto.SSECopy.IsRequested(r.Header) && !crypto.IsMultiPart(objInfo.UserDefined)
+
 	// x-amz-copy-source-if-match : Return the object only if its entity tag (ETag) is the
 	// same as the one specified; otherwise return a 412 (precondition failed).
 	ifMatchETagHeader := r.Header.Get("x-amz-copy-source-if-match")
 	if ifMatchETagHeader != "" {
 		etag := objInfo.ETag
-		if ssec {
+		if shouldDecryptEtag {
 			etag = encETag[len(encETag)-32:]
 		}
 		if objInfo.ETag != "" && !isETagEqual(etag, ifMatchETagHeader) {
@@ -121,7 +121,7 @@ func checkCopyObjectPreconditions(ctx context.Context, w http.ResponseWriter, r
 	ifNoneMatchETagHeader := r.Header.Get("x-amz-copy-source-if-none-match")
 	if ifNoneMatchETagHeader != "" {
 		etag := objInfo.ETag
-		if ssec {
+		if shouldDecryptEtag {
 			etag = encETag[len(encETag)-32:]
 		}
 		if objInfo.ETag != "" && isETagEqual(etag, ifNoneMatchETagHeader) {
@@ -253,9 +253,6 @@ func deleteObject(ctx context.Context, obj ObjectLayer, cache CacheObjectLayer,
 		return err
 	}

-	// Get host and port from Request.RemoteAddr.
-	host, port, _ := net.SplitHostPort(handlers.GetSourceIP(r))
-
 	// Notify object deleted event.
 	sendEvent(eventArgs{
 		EventName:  event.ObjectRemovedDelete,
@@ -265,8 +262,7 @@ func deleteObject(ctx context.Context, obj ObjectLayer, cache CacheObjectLayer,
 		},
 		ReqParams: extractReqParams(r),
 		UserAgent: r.UserAgent(),
-		Host:      host,
-		Port:      port,
+		Host:      handlers.GetSourceIP(r),
 	})

 	return nil
@@ -24,7 +24,6 @@ import (
 	"encoding/xml"
 	"io"
 	goioutil "io/ioutil"
-	"net"
 	"net/http"
 	"net/url"
 	"sort"
@@ -221,12 +220,6 @@ func (api objectAPIHandlers) SelectObjectContentHandler(w http.ResponseWriter, r
 	s3Select.Evaluate(w)
 	s3Select.Close()

-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	// Notify object accessed via a GET request.
 	sendEvent(eventArgs{
 		EventName:    event.ObjectAccessedGet,
@@ -235,8 +228,7 @@ func (api objectAPIHandlers) SelectObjectContentHandler(w http.ResponseWriter, r
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})
 }

@@ -402,12 +394,6 @@ func (api objectAPIHandlers) GetObjectHandler(w http.ResponseWriter, r *http.Req
 		}
 	}

-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	// Notify object accessed via a GET request.
 	sendEvent(eventArgs{
 		EventName:    event.ObjectAccessedGet,
@@ -416,8 +402,7 @@ func (api objectAPIHandlers) GetObjectHandler(w http.ResponseWriter, r *http.Req
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})
 }

@@ -562,11 +547,6 @@ func (api objectAPIHandlers) HeadObjectHandler(w http.ResponseWriter, r *http.Re
 		w.WriteHeader(http.StatusOK)
 	}

-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
 	// Notify object accessed via a HEAD request.
 	sendEvent(eventArgs{
 		EventName:    event.ObjectAccessedHead,
@@ -575,8 +555,7 @@ func (api objectAPIHandlers) HeadObjectHandler(w http.ResponseWriter, r *http.Re
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})
 }

@@ -1032,12 +1011,6 @@ func (api objectAPIHandlers) CopyObjectHandler(w http.ResponseWriter, r *http.Re
 	// Write success response.
 	writeSuccessResponseXML(w, encodedSuccessResponse)

-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	if objInfo.IsCompressed() {
 		objInfo.Size = actualSize
 	}
@@ -1050,8 +1023,7 @@ func (api objectAPIHandlers) CopyObjectHandler(w http.ResponseWriter, r *http.Re
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})
 }

@@ -1303,12 +1275,6 @@ func (api objectAPIHandlers) PutObjectHandler(w http.ResponseWriter, r *http.Req

 	writeSuccessResponseHeadersOnly(w)

-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	// Notify object created event.
 	sendEvent(eventArgs{
 		EventName:    event.ObjectCreatedPut,
@@ -1317,8 +1283,7 @@ func (api objectAPIHandlers) PutObjectHandler(w http.ResponseWriter, r *http.Req
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})
 }

@@ -2345,16 +2310,12 @@ func (api objectAPIHandlers) CompleteMultipartUploadHandler(w http.ResponseWrite
 	writeSuccessResponseXML(w, encodedSuccessResponse)

 	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	if objectAPI.IsEncryptionSupported() {
 		if crypto.IsEncrypted(objInfo.UserDefined) {
 			objInfo.Size, _ = objInfo.DecryptedSize()
 		}
 	}
+
 	// Notify object created event.
 	sendEvent(eventArgs{
 		EventName:    event.ObjectCreatedCompleteMultipartUpload,
@@ -2363,8 +2324,7 @@ func (api objectAPIHandlers) CompleteMultipartUploadHandler(w http.ResponseWrite
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})
 }

@@ -142,6 +142,10 @@ func renameAll(srcFilePath, dstFilePath string) (err error) {
 			return fmt.Errorf("%s (%s)->(%s)", errCrossDeviceLink, srcFilePath, dstFilePath)
 		case os.IsNotExist(err):
 			return errFileNotFound
+		case os.IsExist(err):
+			// This is returned only when destination is a directory and we
+			// are attempting a rename from file to directory.
+			return errIsNotRegular
 		default:
 			return err
 		}
@@ -18,35 +18,35 @@ package cmd

 import "github.com/minio/minio/pkg/event"

-// PeerRPCClientTarget - RPCClient is an event.Target which sends event to target of remote peer.
-type PeerRPCClientTarget struct {
+// PeerRESTClientTarget - RPCClient is an event.Target which sends event to target of remote peer.
+type PeerRESTClientTarget struct {
 	id             event.TargetID
 	remoteTargetID event.TargetID
-	rpcClient      *PeerRPCClient
+	restClient     *peerRESTClient
 	bucketName     string
 }

 // ID - returns target ID.
-func (target *PeerRPCClientTarget) ID() event.TargetID {
+func (target *PeerRESTClientTarget) ID() event.TargetID {
 	return target.id
 }

 // Send - sends event to remote peer by making RPC call.
-func (target *PeerRPCClientTarget) Send(eventData event.Event) error {
-	return target.rpcClient.SendEvent(target.bucketName, target.id, target.remoteTargetID, eventData)
+func (target *PeerRESTClientTarget) Send(eventData event.Event) error {
+	return target.restClient.SendEvent(target.bucketName, target.id, target.remoteTargetID, eventData)
 }

 // Close - does nothing and available for interface compatibility.
-func (target *PeerRPCClientTarget) Close() error {
+func (target *PeerRESTClientTarget) Close() error {
 	return nil
 }

-// NewPeerRPCClientTarget - creates RPCClient target with given target ID available in remote peer.
-func NewPeerRPCClientTarget(bucketName string, targetID event.TargetID, rpcClient *PeerRPCClient) *PeerRPCClientTarget {
-	return &PeerRPCClientTarget{
+// NewPeerRESTClientTarget - creates RPCClient target with given target ID available in remote peer.
+func NewPeerRESTClientTarget(bucketName string, targetID event.TargetID, restClient *peerRESTClient) *PeerRESTClientTarget {
+	return &PeerRESTClientTarget{
 		id:             event.TargetID{ID: targetID.ID, Name: targetID.Name + "+" + mustGetUUID()},
 		remoteTargetID: targetID,
 		bucketName:     bucketName,
-		rpcClient:      rpcClient,
+		restClient:     restClient,
 	}
 }
@@ -0,0 +1,415 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"encoding/gob"
+	"io"
+	"net/url"
+
+	"github.com/minio/minio/cmd/http"
+	"github.com/minio/minio/cmd/logger"
+	"github.com/minio/minio/cmd/rest"
+	"github.com/minio/minio/pkg/event"
+	xnet "github.com/minio/minio/pkg/net"
+	"github.com/minio/minio/pkg/policy"
+)
+
+// client to talk to peer Nodes.
+type peerRESTClient struct {
+	host       *xnet.Host
+	restClient *rest.Client
+	connected  bool
+}
+
+// Reconnect to a peer rest server.
+func (client *peerRESTClient) reConnect() error {
+	// correct (intelligent) retry logic will be
+	// implemented in subsequent PRs.
+	client.connected = true
+	return nil
+}
+
+// Wrapper to restClient.Call to handle network errors, in case of network error the connection is marked disconnected
+// permanently. The only way to restore the connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
+// after verifying format.json
+func (client *peerRESTClient) call(method string, values url.Values, body io.Reader, length int64) (respBody io.ReadCloser, err error) {
+	if !client.connected {
+		err := client.reConnect()
+		logger.LogIf(context.Background(), err)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if values == nil {
+		values = make(url.Values)
+	}
+
+	respBody, err = client.restClient.Call(method, values, body, length)
+	if err == nil {
+		return respBody, nil
+	}
+
+	if isNetworkError(err) {
+		client.connected = false
+	}
+
+	return nil, err
+}
+
+// Stringer provides a canonicalized representation of node.
+func (client *peerRESTClient) String() string {
+	return client.host.String()
+}
+
+// IsOnline - returns whether RPC client failed to connect or not.
+func (client *peerRESTClient) IsOnline() bool {
+	return client.connected
+}
+
+// Close - marks the client as closed.
+func (client *peerRESTClient) Close() error {
+	client.connected = false
+	client.restClient.Close()
+	return nil
+}
+
+// GetLocksResp stores various info from the client for each lock that is requested.
+type GetLocksResp map[string][]lockRequesterInfo
+
+// GetLocks - fetch older locks for a remote node.
+func (client *peerRESTClient) GetLocks() (locks GetLocksResp, err error) {
+	respBody, err := client.call(peerRESTMethodGetLocks, nil, nil, -1)
+	if err != nil {
+		return
+	}
+	defer http.DrainBody(respBody)
+	err = gob.NewDecoder(respBody).Decode(&locks)
+	return locks, err
+}
+
+// ServerInfo - fetch server information for a remote node.
+func (client *peerRESTClient) ServerInfo() (info ServerInfoData, err error) {
+	respBody, err := client.call(peerRESTMethodServerInfo, nil, nil, -1)
+	if err != nil {
+		return
+	}
+	defer http.DrainBody(respBody)
+	err = gob.NewDecoder(respBody).Decode(&info)
+	return info, err
+}
+
+// CPULoadInfo - fetch CPU information for a remote node.
+func (client *peerRESTClient) CPULoadInfo() (info ServerCPULoadInfo, err error) {
+	respBody, err := client.call(peerRESTMethodCPULoadInfo, nil, nil, -1)
+	if err != nil {
+		return
+	}
+	defer http.DrainBody(respBody)
+	err = gob.NewDecoder(respBody).Decode(&info)
+	return info, err
+}
+
+// DrivePerfInfo - fetch Drive performance information for a remote node.
+func (client *peerRESTClient) DrivePerfInfo() (info ServerDrivesPerfInfo, err error) {
+	respBody, err := client.call(peerRESTMethodDrivePerfInfo, nil, nil, -1)
+	if err != nil {
+		return
+	}
+	defer http.DrainBody(respBody)
+	err = gob.NewDecoder(respBody).Decode(&info)
+	return info, err
+}
+
+// MemUsageInfo - fetch memory usage information for a remote node.
+func (client *peerRESTClient) MemUsageInfo() (info ServerMemUsageInfo, err error) {
+	respBody, err := client.call(peerRESTMethodMemUsageInfo, nil, nil, -1)
+	if err != nil {
+		return
+	}
+	defer http.DrainBody(respBody)
+	err = gob.NewDecoder(respBody).Decode(&info)
+	return info, err
+}
+
+// StartProfiling - Issues profiling command on the peer node.
+func (client *peerRESTClient) StartProfiling(profiler string) error {
+	values := make(url.Values)
+	values.Set(peerRESTProfiler, profiler)
+	respBody, err := client.call(peerRESTMethodStartProfiling, values, nil, -1)
+	if err != nil {
+		return err
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+// DownloadProfileData - download profiled data from a remote node.
+func (client *peerRESTClient) DownloadProfileData() (data []byte, err error) {
+	respBody, err := client.call(peerRESTMethodDownloadProfilingData, nil, nil, -1)
+	if err != nil {
+		return
+	}
+	defer http.DrainBody(respBody)
+	err = gob.NewDecoder(respBody).Decode(&data)
+	return data, err
+}
+
+// DeleteBucket - Delete notification and policies related to the bucket.
+func (client *peerRESTClient) DeleteBucket(bucket string) error {
+	values := make(url.Values)
+	values.Set(peerRESTBucket, bucket)
+	respBody, err := client.call(peerRESTMethodDeleteBucket, values, nil, -1)
+	if err != nil {
+		return err
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+// ReloadFormat - reload format on the peer node.
+func (client *peerRESTClient) ReloadFormat(dryRun bool) error {
+	values := make(url.Values)
+	if dryRun {
+		values.Set(peerRESTDryRun, "true")
+	} else {
+		values.Set(peerRESTDryRun, "false")
+	}
+
+	respBody, err := client.call(peerRESTMethodReloadFormat, values, nil, -1)
+	if err != nil {
+		return err
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+// ListenBucketNotification - send listent bucket notification to peer nodes.
+func (client *peerRESTClient) ListenBucketNotification(bucket string, eventNames []event.Name,
+	pattern string, targetID event.TargetID, addr xnet.Host) error {
+	args := listenBucketNotificationReq{
+		EventNames: eventNames,
+		Pattern:    pattern,
+		TargetID:   targetID,
+		Addr:       addr,
+	}
+
+	values := make(url.Values)
+	values.Set(peerRESTBucket, bucket)
+
+	var reader bytes.Buffer
+	err := gob.NewEncoder(&reader).Encode(args)
+	if err != nil {
+		return err
+	}
+
+	respBody, err := client.call(peerRESTMethodBucketNotificationListen, values, &reader, -1)
+	if err != nil {
+		return err
+	}
+
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+// SendEvent - calls send event RPC.
+func (client *peerRESTClient) SendEvent(bucket string, targetID, remoteTargetID event.TargetID, eventData event.Event) error {
+	args := sendEventRequest{
+		TargetID: remoteTargetID,
+		Event:    eventData,
+	}
+
+	values := make(url.Values)
+	values.Set(peerRESTBucket, bucket)
+
+	var reader bytes.Buffer
+	err := gob.NewEncoder(&reader).Encode(args)
+	if err != nil {
+		return err
+	}
+	respBody, err := client.call(peerRESTMethodSendEvent, values, &reader, -1)
+	if err != nil {
+		return err
+	}
+
+	var eventResp sendEventResp
+	defer http.DrainBody(respBody)
+	err = gob.NewDecoder(respBody).Decode(&eventResp)
+
+	if err != nil || !eventResp.Success {
+		reqInfo := &logger.ReqInfo{BucketName: bucket}
+		reqInfo.AppendTags("targetID", targetID.Name)
+		reqInfo.AppendTags("event", eventData.EventName.String())
+		ctx := logger.SetReqInfo(context.Background(), reqInfo)
+		logger.LogIf(ctx, err)
+		globalNotificationSys.RemoveRemoteTarget(bucket, targetID)
+	}
+
+	return err
+}
+
+// RemoteTargetExist - calls remote target ID exist REST API.
+func (client *peerRESTClient) RemoteTargetExist(bucket string, targetID event.TargetID) (bool, error) {
+	values := make(url.Values)
+	values.Set(peerRESTBucket, bucket)
+
+	var reader bytes.Buffer
+	err := gob.NewEncoder(&reader).Encode(targetID)
+	if err != nil {
+		return false, err
+	}
+
+	respBody, err := client.call(peerRESTMethodTargetExists, values, &reader, -1)
+	if err != nil {
+		return false, err
+	}
+	defer http.DrainBody(respBody)
+	var targetExists remoteTargetExistsResp
+	err = gob.NewDecoder(respBody).Decode(&targetExists)
+	return targetExists.Exists, err
+}
+
+// RemoveBucketPolicy - Remove bucket policy on the peer node.
+func (client *peerRESTClient) RemoveBucketPolicy(bucket string) error {
+	values := make(url.Values)
+	values.Set(peerRESTBucket, bucket)
+	respBody, err := client.call(peerRESTMethodBucketPolicyRemove, values, nil, -1)
+	if err != nil {
+		return err
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+// SetBucketPolicy - Set bucket policy on the peer node.
+func (client *peerRESTClient) SetBucketPolicy(bucket string, bucketPolicy *policy.Policy) error {
+	values := make(url.Values)
+	values.Set(peerRESTBucket, bucket)
+
+	var reader bytes.Buffer
+	err := gob.NewEncoder(&reader).Encode(bucketPolicy)
+	if err != nil {
+		return err
+	}
+
+	respBody, err := client.call(peerRESTMethodBucketPolicySet, values, &reader, -1)
+	if err != nil {
+		return err
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+// PutBucketNotification - Put bucket notification on the peer node.
+func (client *peerRESTClient) PutBucketNotification(bucket string, rulesMap event.RulesMap) error {
+	values := make(url.Values)
+	values.Set(peerRESTBucket, bucket)
+
+	var reader bytes.Buffer
+	err := gob.NewEncoder(&reader).Encode(&rulesMap)
+	if err != nil {
+		return err
+	}
+
+	respBody, err := client.call(peerRESTMethodBucketNotificationPut, values, &reader, -1)
+	if err != nil {
+		return err
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+// LoadUsers - send load users command to peer nodes.
+func (client *peerRESTClient) LoadUsers() (err error) {
+	respBody, err := client.call(peerRESTMethodLoadUsers, nil, nil, -1)
+	if err != nil {
+		return
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+// SignalService - sends signal to peer nodes.
+func (client *peerRESTClient) SignalService(sig serviceSignal) error {
+	values := make(url.Values)
+	values.Set(peerRESTSignal, string(sig))
+	respBody, err := client.call(peerRESTMethodSignalService, values, nil, -1)
+	if err != nil {
+		return err
+	}
+	defer http.DrainBody(respBody)
+	return nil
+}
+
+func getRemoteHosts(endpoints EndpointList) []*xnet.Host {
+	var remoteHosts []*xnet.Host
+	for _, hostStr := range GetRemotePeers(endpoints) {
+		host, err := xnet.ParseHost(hostStr)
+		logger.FatalIf(err, "Unable to parse peer Host")
+		remoteHosts = append(remoteHosts, host)
+	}
+
+	return remoteHosts
+}
+
+func getRestClients(peerHosts []*xnet.Host) ([]*peerRESTClient, error) {
+	restClients := make([]*peerRESTClient, len(peerHosts))
+	for i, host := range peerHosts {
+		client, err := newPeerRESTClient(host)
+		if err != nil {
+			logger.LogIf(context.Background(), err)
+		}
+		restClients[i] = client
+	}
+
+	return restClients, nil
+}
+
+// Returns a peer rest client.
+func newPeerRESTClient(peer *xnet.Host) (*peerRESTClient, error) {
+
+	scheme := "http"
+	if globalIsSSL {
+		scheme = "https"
+	}
+
+	serverURL := &url.URL{
+		Scheme: scheme,
+		Host:   peer.String(),
+		Path:   peerRESTPath,
+	}
+
+	var tlsConfig *tls.Config
+	if globalIsSSL {
+		tlsConfig = &tls.Config{
+			ServerName: peer.Name,
+			RootCAs:    globalRootCAs,
+		}
+	}
+
+	restClient, err := rest.NewClient(serverURL, tlsConfig, rest.DefaultRESTTimeout, newAuthToken)
+
+	if err != nil {
+		return &peerRESTClient{host: peer, restClient: restClient, connected: false}, err
+	}
+
+	return &peerRESTClient{host: peer, restClient: restClient, connected: true}, nil
+}
@@ -0,0 +1,47 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+const peerRESTVersion = "v1"
+const peerRESTPath = minioReservedBucketPath + "/peer/" + peerRESTVersion
+
+const (
+	peerRESTMethodServerInfo               = "serverinfo"
+	peerRESTMethodCPULoadInfo              = "cpuloadinfo"
+	peerRESTMethodMemUsageInfo             = "memusageinfo"
+	peerRESTMethodDrivePerfInfo            = "driveperfinfo"
+	peerRESTMethodDeleteBucket             = "deletebucket"
+	peerRESTMethodSignalService            = "signalservice"
+	peerRESTMethodGetLocks                 = "getlocks"
+	peerRESTMethodBucketPolicyRemove       = "removebucketpolicy"
+	peerRESTMethodLoadUsers                = "loadusers"
+	peerRESTMethodStartProfiling           = "startprofiling"
+	peerRESTMethodDownloadProfilingData    = "downloadprofilingdata"
+	peerRESTMethodBucketPolicySet          = "setbucketpolicy"
+	peerRESTMethodBucketNotificationPut    = "putbucketnotification"
+	peerRESTMethodBucketNotificationListen = "listenbucketnotification"
+	peerRESTMethodReloadFormat             = "reloadformat"
+	peerRESTMethodTargetExists             = "targetexists"
+	peerRESTMethodSendEvent                = "sendevent"
+)
+
+const (
+	peerRESTBucket   = "bucket"
+	peerRESTSignal   = "signal"
+	peerRESTProfiler = "profiler"
+	peerRESTDryRun   = "dry-run"
+)
@@ -0,0 +1,592 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"context"
+	"encoding/gob"
+	"errors"
+	"fmt"
+	"net/http"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/gorilla/mux"
+	"github.com/minio/minio/cmd/logger"
+	"github.com/minio/minio/pkg/event"
+	xnet "github.com/minio/minio/pkg/net"
+	"github.com/minio/minio/pkg/policy"
+)
+
+// To abstract a node over network.
+type peerRESTServer struct {
+}
+
+func getServerInfo() (*ServerInfoData, error) {
+	if globalBootTime.IsZero() {
+		return nil, errServerNotInitialized
+	}
+
+	objLayer := newObjectLayerFn()
+	if objLayer == nil {
+		return nil, errServerNotInitialized
+	}
+	// Server info data.
+	return &ServerInfoData{
+		StorageInfo: objLayer.StorageInfo(context.Background()),
+		ConnStats:   globalConnStats.toServerConnStats(),
+		HTTPStats:   globalHTTPStats.toServerHTTPStats(),
+		Properties: ServerProperties{
+			Uptime:       UTCNow().Sub(globalBootTime),
+			Version:      Version,
+			CommitID:     CommitID,
+			DeploymentID: globalDeploymentID,
+			SQSARN:       globalNotificationSys.GetARNList(),
+			Region:       globalServerConfig.GetRegion(),
+		},
+	}, nil
+}
+
+// uptimes - used to sort uptimes in chronological order.
+type uptimes []time.Duration
+
+func (ts uptimes) Len() int {
+	return len(ts)
+}
+
+func (ts uptimes) Less(i, j int) bool {
+	return ts[i] < ts[j]
+}
+
+func (ts uptimes) Swap(i, j int) {
+	ts[i], ts[j] = ts[j], ts[i]
+}
+
+// getPeerUptimes - returns the uptime.
+func getPeerUptimes(serverInfo []ServerInfo) time.Duration {
+	// In a single node Erasure or FS backend setup the uptime of
+	// the setup is the uptime of the single minio server
+	// instance.
+	if !globalIsDistXL {
+		return UTCNow().Sub(globalBootTime)
+	}
+
+	var times []time.Duration
+
+	for _, info := range serverInfo {
+		if info.Error != "" {
+			continue
+		}
+		times = append(times, info.Data.Properties.Uptime)
+	}
+
+	// Sort uptimes in chronological order.
+	sort.Sort(uptimes(times))
+
+	// Return the latest time as the uptime.
+	return times[0]
+}
+
+// GetLocksHandler - returns list of older lock from the server.
+func (s *peerRESTServer) GetLocksHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	ctx := newContext(r, w, "GetLocks")
+	locks := globalLockServer.ll.DupLockMap()
+	logger.LogIf(ctx, gob.NewEncoder(w).Encode(locks))
+
+	w.(http.Flusher).Flush()
+
+}
+
+// LoadUsersHandler - returns server info.
+func (s *peerRESTServer) LoadUsersHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	objAPI := newObjectLayerFn()
+	if objAPI == nil {
+		s.writeErrorResponse(w, errServerNotInitialized)
+		return
+	}
+
+	err := globalIAMSys.Load(objAPI)
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+
+	w.(http.Flusher).Flush()
+}
+
+// StartProfilingHandler - Issues the start profiling command.
+func (s *peerRESTServer) StartProfilingHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	profiler := vars[peerRESTProfiler]
+	if profiler == "" {
+		s.writeErrorResponse(w, errors.New("profiler name is missing"))
+		return
+	}
+
+	if globalProfiler != nil {
+		globalProfiler.Stop()
+	}
+
+	var err error
+	globalProfiler, err = startProfiler(profiler, "")
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+
+	w.(http.Flusher).Flush()
+}
+
+// ServerInfoHandler - returns server info.
+func (s *peerRESTServer) ServerInfoHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	ctx := newContext(r, w, "ServerInfo")
+	info, err := getServerInfo()
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+
+	defer w.(http.Flusher).Flush()
+	logger.LogIf(ctx, gob.NewEncoder(w).Encode(info))
+}
+
+// DownloadProflingDataHandler - returns proflied data.
+func (s *peerRESTServer) DownloadProflingDataHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	ctx := newContext(r, w, "DownloadProfiling")
+	profileData, err := getProfileData()
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+
+	defer w.(http.Flusher).Flush()
+	logger.LogIf(ctx, gob.NewEncoder(w).Encode(profileData))
+}
+
+// CPULoadInfoHandler - returns CPU Load info.
+func (s *peerRESTServer) CPULoadInfoHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	ctx := newContext(r, w, "CPULoadInfo")
+	info := localEndpointsCPULoad(globalEndpoints)
+
+	defer w.(http.Flusher).Flush()
+	logger.LogIf(ctx, gob.NewEncoder(w).Encode(info))
+}
+
+// DrivePerfInfoHandler - returns Drive Performance info.
+func (s *peerRESTServer) DrivePerfInfoHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	ctx := newContext(r, w, "DrivePerfInfo")
+	info := localEndpointsDrivePerf(globalEndpoints)
+
+	defer w.(http.Flusher).Flush()
+	logger.LogIf(ctx, gob.NewEncoder(w).Encode(info))
+}
+
+// MemUsageInfoHandler - returns Memory Usage info.
+func (s *peerRESTServer) MemUsageInfoHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+	ctx := newContext(r, w, "MemUsageInfo")
+	info := localEndpointsMemUsage(globalEndpoints)
+
+	defer w.(http.Flusher).Flush()
+	logger.LogIf(ctx, gob.NewEncoder(w).Encode(info))
+}
+
+// DeleteBucketHandler - Delete notification and policies related to the bucket.
+func (s *peerRESTServer) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	bucketName := vars[peerRESTBucket]
+	if bucketName == "" {
+		s.writeErrorResponse(w, errors.New("Bucket name is missing"))
+		return
+	}
+
+	globalNotificationSys.RemoveNotification(bucketName)
+	globalPolicySys.Remove(bucketName)
+
+	w.(http.Flusher).Flush()
+}
+
+// ReloadFormatHandler - Reload Format.
+func (s *peerRESTServer) ReloadFormatHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	dryRunString := vars[peerRESTDryRun]
+	if dryRunString == "" {
+		s.writeErrorResponse(w, errors.New("dry run parameter is missing"))
+		return
+	}
+
+	var dryRun bool
+	switch strings.ToLower(dryRunString) {
+	case "true":
+		dryRun = true
+	case "false":
+		dryRun = false
+	default:
+		s.writeErrorResponse(w, errInvalidArgument)
+		return
+	}
+
+	objAPI := newObjectLayerFn()
+	if objAPI == nil {
+		s.writeErrorResponse(w, errServerNotInitialized)
+		return
+	}
+	err := objAPI.ReloadFormat(context.Background(), dryRun)
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+	w.(http.Flusher).Flush()
+}
+
+// RemoveBucketPolicyHandler - Remove bucket policy.
+func (s *peerRESTServer) RemoveBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	bucketName := vars[peerRESTBucket]
+	if bucketName == "" {
+		s.writeErrorResponse(w, errors.New("Bucket name is missing"))
+		return
+	}
+
+	globalPolicySys.Remove(bucketName)
+	w.(http.Flusher).Flush()
+}
+
+// SetBucketPolicyHandler - Set bucket policy.
+func (s *peerRESTServer) SetBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	bucketName := vars[peerRESTBucket]
+	if bucketName == "" {
+		s.writeErrorResponse(w, errors.New("Bucket name is missing"))
+		return
+	}
+	var policyData policy.Policy
+	if r.ContentLength < 0 {
+		s.writeErrorResponse(w, errInvalidArgument)
+		return
+	}
+
+	err := gob.NewDecoder(r.Body).Decode(&policyData)
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+	globalPolicySys.Set(bucketName, policyData)
+	w.(http.Flusher).Flush()
+}
+
+type remoteTargetExistsResp struct {
+	Exists bool
+}
+
+// TargetExistsHandler - Check if Target exists.
+func (s *peerRESTServer) TargetExistsHandler(w http.ResponseWriter, r *http.Request) {
+	ctx := newContext(r, w, "TargetExists")
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	bucketName := vars[peerRESTBucket]
+	if bucketName == "" {
+		s.writeErrorResponse(w, errors.New("Bucket name is missing"))
+		return
+	}
+	var targetID event.TargetID
+	if r.ContentLength <= 0 {
+		s.writeErrorResponse(w, errInvalidArgument)
+		return
+	}
+
+	err := gob.NewDecoder(r.Body).Decode(&targetID)
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+
+	var targetExists remoteTargetExistsResp
+	targetExists.Exists = globalNotificationSys.RemoteTargetExist(bucketName, targetID)
+
+	defer w.(http.Flusher).Flush()
+	logger.LogIf(ctx, gob.NewEncoder(w).Encode(&targetExists))
+}
+
+type sendEventRequest struct {
+	Event    event.Event
+	TargetID event.TargetID
+}
+
+type sendEventResp struct {
+	Success bool
+}
+
+// SendEventHandler - Send Event.
+func (s *peerRESTServer) SendEventHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	ctx := newContext(r, w, "SendEvent")
+
+	vars := mux.Vars(r)
+	bucketName := vars[peerRESTBucket]
+	if bucketName == "" {
+		s.writeErrorResponse(w, errors.New("Bucket name is missing"))
+		return
+	}
+	var eventReq sendEventRequest
+	if r.ContentLength <= 0 {
+		s.writeErrorResponse(w, errInvalidArgument)
+		return
+	}
+
+	err := gob.NewDecoder(r.Body).Decode(&eventReq)
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+
+	var eventResp sendEventResp
+	eventResp.Success = true
+	errs := globalNotificationSys.send(bucketName, eventReq.Event, eventReq.TargetID)
+
+	for i := range errs {
+		reqInfo := (&logger.ReqInfo{}).AppendTags("Event", eventReq.Event.EventName.String())
+		reqInfo.AppendTags("targetName", eventReq.TargetID.Name)
+		ctx := logger.SetReqInfo(context.Background(), reqInfo)
+		logger.LogIf(ctx, errs[i].Err)
+
+		eventResp.Success = false
+		s.writeErrorResponse(w, errs[i].Err)
+		return
+	}
+	logger.LogIf(ctx, gob.NewEncoder(w).Encode(&eventResp))
+	w.(http.Flusher).Flush()
+}
+
+// PutBucketNotificationHandler - Set bucket policy.
+func (s *peerRESTServer) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	bucketName := vars[peerRESTBucket]
+	if bucketName == "" {
+		s.writeErrorResponse(w, errors.New("Bucket name is missing"))
+		return
+	}
+
+	var rulesMap event.RulesMap
+	if r.ContentLength < 0 {
+		s.writeErrorResponse(w, errInvalidArgument)
+		return
+	}
+
+	err := gob.NewDecoder(r.Body).Decode(&rulesMap)
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+
+	globalNotificationSys.AddRulesMap(bucketName, rulesMap)
+	w.(http.Flusher).Flush()
+}
+
+type listenBucketNotificationReq struct {
+	EventNames []event.Name   `json:"eventNames"`
+	Pattern    string         `json:"pattern"`
+	TargetID   event.TargetID `json:"targetId"`
+	Addr       xnet.Host      `json:"addr"`
+}
+
+// ListenBucketNotificationHandler - Listen bucket notification handler.
+func (s *peerRESTServer) ListenBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	bucketName := vars[peerRESTBucket]
+	if bucketName == "" {
+		s.writeErrorResponse(w, errors.New("Bucket name is missing"))
+		return
+	}
+
+	var args listenBucketNotificationReq
+	if r.ContentLength <= 0 {
+		s.writeErrorResponse(w, errInvalidArgument)
+		return
+	}
+
+	err := gob.NewDecoder(r.Body).Decode(&args)
+	if err != nil {
+		s.writeErrorResponse(w, err)
+		return
+	}
+
+	restClient, err := newPeerRESTClient(&args.Addr)
+	if err != nil {
+		s.writeErrorResponse(w, fmt.Errorf("unable to find PeerRESTClient for provided address %v. This happens only if remote and this minio run with different set of endpoints", args.Addr))
+		return
+	}
+
+	target := NewPeerRESTClientTarget(bucketName, args.TargetID, restClient)
+	rulesMap := event.NewRulesMap(args.EventNames, args.Pattern, target.ID())
+	if err := globalNotificationSys.AddRemoteTarget(bucketName, target, rulesMap); err != nil {
+		reqInfo := &logger.ReqInfo{BucketName: target.bucketName}
+		reqInfo.AppendTags("target", target.id.Name)
+		ctx := logger.SetReqInfo(context.Background(), reqInfo)
+		logger.LogIf(ctx, err)
+		s.writeErrorResponse(w, err)
+		return
+	}
+	w.(http.Flusher).Flush()
+}
+
+var errUnsupportedSignal = fmt.Errorf("unsupported signal: only restart and stop signals are supported")
+
+// SignalServiceHandler - signal service handler.
+func (s *peerRESTServer) SignalServiceHandler(w http.ResponseWriter, r *http.Request) {
+	if !s.IsValid(w, r) {
+		s.writeErrorResponse(w, errors.New("Invalid request"))
+		return
+	}
+
+	vars := mux.Vars(r)
+	signalString := vars[peerRESTSignal]
+	if signalString == "" {
+		s.writeErrorResponse(w, errors.New("signal name is missing"))
+		return
+	}
+	signal := serviceSignal(signalString)
+	defer w.(http.Flusher).Flush()
+	switch signal {
+	case serviceRestart, serviceStop:
+		globalServiceSignalCh <- signal
+	default:
+		s.writeErrorResponse(w, errUnsupportedSignal)
+		return
+	}
+}
+
+func (s *peerRESTServer) writeErrorResponse(w http.ResponseWriter, err error) {
+	w.WriteHeader(http.StatusForbidden)
+	w.Write([]byte(err.Error()))
+}
+
+// IsValid - To authenticate and verify the time difference.
+func (s *peerRESTServer) IsValid(w http.ResponseWriter, r *http.Request) bool {
+	if err := storageServerRequestValidate(r); err != nil {
+		s.writeErrorResponse(w, err)
+		return false
+	}
+	return true
+}
+
+// registerPeerRESTHandlers - register peer rest router.
+func registerPeerRESTHandlers(router *mux.Router) {
+	server := &peerRESTServer{}
+	subrouter := router.PathPrefix(peerRESTPath).Subrouter()
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodGetLocks).HandlerFunc(httpTraceHdrs(server.GetLocksHandler))
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodServerInfo).HandlerFunc(httpTraceHdrs(server.ServerInfoHandler))
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodCPULoadInfo).HandlerFunc(httpTraceHdrs(server.CPULoadInfoHandler))
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodMemUsageInfo).HandlerFunc(httpTraceHdrs(server.MemUsageInfoHandler))
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodDrivePerfInfo).HandlerFunc(httpTraceHdrs(server.DrivePerfInfoHandler))
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodDeleteBucket).HandlerFunc(httpTraceHdrs(server.DeleteBucketHandler)).Queries(restQueries(peerRESTBucket)...)
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodSignalService).HandlerFunc(httpTraceHdrs(server.SignalServiceHandler)).Queries(restQueries(peerRESTSignal)...)
+
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodBucketPolicyRemove).HandlerFunc(httpTraceAll(server.RemoveBucketPolicyHandler)).Queries(restQueries(peerRESTBucket)...)
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodBucketPolicySet).HandlerFunc(httpTraceHdrs(server.SetBucketPolicyHandler)).Queries(restQueries(peerRESTBucket)...)
+
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodLoadUsers).HandlerFunc(httpTraceAll(server.LoadUsersHandler))
+
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodStartProfiling).HandlerFunc(httpTraceAll(server.StartProfilingHandler)).Queries(restQueries(peerRESTProfiler)...)
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodDownloadProfilingData).HandlerFunc(httpTraceHdrs(server.DownloadProflingDataHandler))
+
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodTargetExists).HandlerFunc(httpTraceHdrs(server.TargetExistsHandler)).Queries(restQueries(peerRESTBucket)...)
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodSendEvent).HandlerFunc(httpTraceHdrs(server.SendEventHandler)).Queries(restQueries(peerRESTBucket)...)
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodBucketNotificationPut).HandlerFunc(httpTraceHdrs(server.PutBucketNotificationHandler)).Queries(restQueries(peerRESTBucket)...)
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodBucketNotificationListen).HandlerFunc(httpTraceHdrs(server.ListenBucketNotificationHandler)).Queries(restQueries(peerRESTBucket)...)
+
+	subrouter.Methods(http.MethodPost).Path("/" + peerRESTMethodReloadFormat).HandlerFunc(httpTraceHdrs(server.ReloadFormatHandler)).Queries(restQueries(peerRESTDryRun)...)
+
+	router.NotFoundHandler = http.HandlerFunc(httpTraceAll(notFoundHandler))
+}
@@ -1,261 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018, 2019 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import (
-	"context"
-	"crypto/tls"
-
-	"github.com/minio/minio/cmd/logger"
-	"github.com/minio/minio/pkg/event"
-	xnet "github.com/minio/minio/pkg/net"
-	"github.com/minio/minio/pkg/policy"
-)
-
-// PeerRPCClient - peer RPC client talks to peer RPC server.
-type PeerRPCClient struct {
-	*RPCClient
-}
-
-// DeleteBucket - calls delete bucket RPC.
-func (rpcClient *PeerRPCClient) DeleteBucket(bucketName string) error {
-	args := DeleteBucketArgs{BucketName: bucketName}
-	reply := VoidReply{}
-	return rpcClient.Call(peerServiceName+".DeleteBucket", &args, &reply)
-}
-
-// SetBucketPolicy - calls set bucket policy RPC.
-func (rpcClient *PeerRPCClient) SetBucketPolicy(bucketName string, bucketPolicy *policy.Policy) error {
-	args := SetBucketPolicyArgs{
-		BucketName: bucketName,
-		Policy:     *bucketPolicy,
-	}
-	reply := VoidReply{}
-	return rpcClient.Call(peerServiceName+".SetBucketPolicy", &args, &reply)
-}
-
-// RemoveBucketPolicy - calls remove bucket policy RPC.
-func (rpcClient *PeerRPCClient) RemoveBucketPolicy(bucketName string) error {
-	args := RemoveBucketPolicyArgs{
-		BucketName: bucketName,
-	}
-	reply := VoidReply{}
-	return rpcClient.Call(peerServiceName+".RemoveBucketPolicy", &args, &reply)
-}
-
-// PutBucketNotification - calls put bukcet notification RPC.
-func (rpcClient *PeerRPCClient) PutBucketNotification(bucketName string, rulesMap event.RulesMap) error {
-	args := PutBucketNotificationArgs{
-		BucketName: bucketName,
-		RulesMap:   rulesMap,
-	}
-	reply := VoidReply{}
-	return rpcClient.Call(peerServiceName+".PutBucketNotification", &args, &reply)
-}
-
-// ListenBucketNotification - calls listen bucket notification RPC.
-func (rpcClient *PeerRPCClient) ListenBucketNotification(bucketName string, eventNames []event.Name,
-	pattern string, targetID event.TargetID, addr xnet.Host) error {
-	args := ListenBucketNotificationArgs{
-		BucketName: bucketName,
-		EventNames: eventNames,
-		Pattern:    pattern,
-		TargetID:   targetID,
-		Addr:       addr,
-	}
-	reply := VoidReply{}
-	return rpcClient.Call(peerServiceName+".ListenBucketNotification", &args, &reply)
-}
-
-// RemoteTargetExist - calls remote target ID exist RPC.
-func (rpcClient *PeerRPCClient) RemoteTargetExist(bucketName string, targetID event.TargetID) (bool, error) {
-	args := RemoteTargetExistArgs{
-		BucketName: bucketName,
-		TargetID:   targetID,
-	}
-	var reply bool
-
-	err := rpcClient.Call(peerServiceName+".RemoteTargetExist", &args, &reply)
-	return reply, err
-}
-
-// SendEvent - calls send event RPC.
-func (rpcClient *PeerRPCClient) SendEvent(bucketName string, targetID, remoteTargetID event.TargetID, eventData event.Event) error {
-	args := SendEventArgs{
-		BucketName: bucketName,
-		TargetID:   remoteTargetID,
-		Event:      eventData,
-	}
-	var reply bool
-
-	err := rpcClient.Call(peerServiceName+".SendEvent", &args, &reply)
-	if err != nil && !reply {
-		reqInfo := &logger.ReqInfo{BucketName: bucketName}
-		reqInfo.AppendTags("targetID", targetID.Name)
-		reqInfo.AppendTags("event", eventData.EventName.String())
-		ctx := logger.SetReqInfo(context.Background(), reqInfo)
-		logger.LogIf(ctx, err)
-		globalNotificationSys.RemoveRemoteTarget(bucketName, targetID)
-	}
-
-	return err
-}
-
-// ReloadFormat - calls reload format RPC.
-func (rpcClient *PeerRPCClient) ReloadFormat(dryRun bool) error {
-	args := ReloadFormatArgs{
-		DryRun: dryRun,
-	}
-	reply := VoidReply{}
-
-	return rpcClient.Call(peerServiceName+".ReloadFormat", &args, &reply)
-}
-
-// LoadUsers - calls load users RPC.
-func (rpcClient *PeerRPCClient) LoadUsers() error {
-	args := AuthArgs{}
-	reply := VoidReply{}
-
-	return rpcClient.Call(peerServiceName+".LoadUsers", &args, &reply)
-}
-
-// LoadCredentials - calls load credentials RPC.
-func (rpcClient *PeerRPCClient) LoadCredentials() error {
-	args := AuthArgs{}
-	reply := VoidReply{}
-
-	return rpcClient.Call(peerServiceName+".LoadCredentials", &args, &reply)
-}
-
-// DrivePerfInfo - returns drive performance info for remote server.
-func (rpcClient *PeerRPCClient) DrivePerfInfo() (ServerDrivesPerfInfo, error) {
-	args := AuthArgs{}
-	var reply ServerDrivesPerfInfo
-
-	err := rpcClient.Call(peerServiceName+".DrivePerfInfo", &args, &reply)
-	return reply, err
-}
-
-// MemUsageInfo - returns mem utilization info for remote server
-func (rpcClient *PeerRPCClient) MemUsageInfo() (ServerMemUsageInfo, error) {
-	args := AuthArgs{}
-	var reply ServerMemUsageInfo
-
-	err := rpcClient.Call(peerServiceName+".MemUsageInfo", &args, &reply)
-	return reply, err
-}
-
-// CPULoadInfo - returns cpu performance info for remote server
-func (rpcClient *PeerRPCClient) CPULoadInfo() (ServerCPULoadInfo, error) {
-	args := AuthArgs{}
-	var reply ServerCPULoadInfo
-
-	err := rpcClient.Call(peerServiceName+".CPULoadInfo", &args, &reply)
-	return reply, err
-}
-
-// StartProfiling - starts profiling on the remote server.
-func (rpcClient *PeerRPCClient) StartProfiling(profiler string) error {
-	args := StartProfilingArgs{Profiler: profiler}
-	reply := VoidReply{}
-	return rpcClient.Call(peerServiceName+".StartProfiling", &args, &reply)
-}
-
-// DownloadProfilingData - download already running profiling on the remote server.
-func (rpcClient *PeerRPCClient) DownloadProfilingData() ([]byte, error) {
-	args := AuthArgs{}
-	var reply []byte
-	err := rpcClient.Call(peerServiceName+".DownloadProfilingData", &args, &reply)
-	return reply, err
-}
-
-// SignalService - calls load server info RPC.
-func (rpcClient *PeerRPCClient) SignalService(sig serviceSignal) error {
-	args := SignalServiceArgs{Sig: sig}
-	reply := VoidReply{}
-
-	return rpcClient.Call(peerServiceName+".SignalService", &args, &reply)
-}
-
-// ServerInfo - calls load server info RPC.
-func (rpcClient *PeerRPCClient) ServerInfo() (ServerInfoData, error) {
-	args := AuthArgs{}
-	reply := ServerInfoData{}
-
-	err := rpcClient.Call(peerServiceName+".ServerInfo", &args, &reply)
-	return reply, err
-}
-
-// GetLocksResp stores various info from the client for each lock that is requested.
-type GetLocksResp map[string][]lockRequesterInfo
-
-// GetLocks - returns the lock information on the server to which the RPC call is made.
-func (rpcClient *PeerRPCClient) GetLocks() (resp GetLocksResp, err error) {
-	err = rpcClient.Call(peerServiceName+".GetLocks", &AuthArgs{}, &resp)
-	return resp, err
-}
-
-// NewPeerRPCClient - returns new peer RPC client.
-func NewPeerRPCClient(host *xnet.Host) (*PeerRPCClient, error) {
-	scheme := "http"
-	if globalIsSSL {
-		scheme = "https"
-	}
-
-	serviceURL := &xnet.URL{
-		Scheme: scheme,
-		Host:   host.String(),
-		Path:   peerServicePath,
-	}
-
-	var tlsConfig *tls.Config
-	if globalIsSSL {
-		tlsConfig = &tls.Config{
-			ServerName: host.Name,
-			RootCAs:    globalRootCAs,
-		}
-	}
-
-	rpcClient, err := NewRPCClient(
-		RPCClientArgs{
-			NewAuthTokenFunc: newAuthToken,
-			RPCVersion:       globalRPCAPIVersion,
-			ServiceName:      peerServiceName,
-			ServiceURL:       serviceURL,
-			TLSConfig:        tlsConfig,
-		},
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return &PeerRPCClient{rpcClient}, nil
-}
-
-// makeRemoteRPCClients - creates Peer RPCClients for given endpoint list.
-func makeRemoteRPCClients(endpoints EndpointList) map[xnet.Host]*PeerRPCClient {
-	peerRPCClientMap := make(map[xnet.Host]*PeerRPCClient)
-	for _, hostStr := range GetRemotePeers(endpoints) {
-		host, err := xnet.ParseHost(hostStr)
-		logger.FatalIf(err, "Unable to parse peer RPC Host")
-		rpcClient, err := NewPeerRPCClient(host)
-		logger.FatalIf(err, "Unable to parse peer RPC Client")
-		peerRPCClientMap[*host] = rpcClient
-	}
-
-	return peerRPCClientMap
-}
@@ -1,419 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2018, 2019 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import (
-	"context"
-	"fmt"
-	"path"
-	"sort"
-	"time"
-
-	"github.com/gorilla/mux"
-	"github.com/minio/minio/cmd/logger"
-	xrpc "github.com/minio/minio/cmd/rpc"
-	"github.com/minio/minio/pkg/event"
-	xnet "github.com/minio/minio/pkg/net"
-	"github.com/minio/minio/pkg/policy"
-)
-
-const peerServiceName = "Peer"
-const peerServiceSubPath = "/peer/remote"
-
-var peerServicePath = path.Join(minioReservedBucketPath, peerServiceSubPath)
-
-// peerRPCReceiver - Peer RPC receiver for peer RPC server.
-type peerRPCReceiver struct{}
-
-// DeleteBucketArgs - delete bucket RPC arguments.
-type DeleteBucketArgs struct {
-	AuthArgs
-	BucketName string
-}
-
-// DeleteBucket - handles delete bucket RPC call which removes all values of given bucket in global NotificationSys object.
-func (receiver *peerRPCReceiver) DeleteBucket(args *DeleteBucketArgs, reply *VoidReply) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	globalNotificationSys.RemoveNotification(args.BucketName)
-	globalPolicySys.Remove(args.BucketName)
-	return nil
-}
-
-// SetBucketPolicyArgs - set bucket policy RPC arguments.
-type SetBucketPolicyArgs struct {
-	AuthArgs
-	BucketName string
-	Policy     policy.Policy
-}
-
-// SetBucketPolicy - handles set bucket policy RPC call which adds bucket policy to globalPolicySys.
-func (receiver *peerRPCReceiver) SetBucketPolicy(args *SetBucketPolicyArgs, reply *VoidReply) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	globalPolicySys.Set(args.BucketName, args.Policy)
-	return nil
-}
-
-// RemoveBucketPolicyArgs - delete bucket policy RPC arguments.
-type RemoveBucketPolicyArgs struct {
-	AuthArgs
-	BucketName string
-}
-
-// RemoveBucketPolicy - handles delete bucket policy RPC call which removes bucket policy to globalPolicySys.
-func (receiver *peerRPCReceiver) RemoveBucketPolicy(args *RemoveBucketPolicyArgs, reply *VoidReply) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	globalPolicySys.Remove(args.BucketName)
-	return nil
-}
-
-// PutBucketNotificationArgs - put bucket notification RPC arguments.
-type PutBucketNotificationArgs struct {
-	AuthArgs
-	BucketName string
-	RulesMap   event.RulesMap
-}
-
-// PutBucketNotification - handles put bucket notification RPC call which adds rules to given bucket to global NotificationSys object.
-func (receiver *peerRPCReceiver) PutBucketNotification(args *PutBucketNotificationArgs, reply *VoidReply) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	globalNotificationSys.AddRulesMap(args.BucketName, args.RulesMap)
-	return nil
-}
-
-// ListenBucketNotificationArgs - listen bucket notification RPC arguments.
-type ListenBucketNotificationArgs struct {
-	AuthArgs   `json:"-"`
-	BucketName string         `json:"-"`
-	EventNames []event.Name   `json:"eventNames"`
-	Pattern    string         `json:"pattern"`
-	TargetID   event.TargetID `json:"targetId"`
-	Addr       xnet.Host      `json:"addr"`
-}
-
-// ListenBucketNotification - handles listen bucket notification RPC call.
-// It creates PeerRPCClient target which pushes requested events to target in remote peer.
-func (receiver *peerRPCReceiver) ListenBucketNotification(args *ListenBucketNotificationArgs, reply *VoidReply) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	rpcClient := globalNotificationSys.GetPeerRPCClient(args.Addr)
-	if rpcClient == nil {
-		return fmt.Errorf("unable to find PeerRPCClient for provided address %v. This happens only if remote and this minio run with different set of endpoints", args.Addr)
-	}
-
-	target := NewPeerRPCClientTarget(args.BucketName, args.TargetID, rpcClient)
-	rulesMap := event.NewRulesMap(args.EventNames, args.Pattern, target.ID())
-	if err := globalNotificationSys.AddRemoteTarget(args.BucketName, target, rulesMap); err != nil {
-		reqInfo := &logger.ReqInfo{BucketName: target.bucketName}
-		reqInfo.AppendTags("target", target.id.Name)
-		ctx := logger.SetReqInfo(context.Background(), reqInfo)
-		logger.LogIf(ctx, err)
-		return err
-	}
-	return nil
-}
-
-// RemoteTargetExistArgs - remote target ID exist RPC arguments.
-type RemoteTargetExistArgs struct {
-	AuthArgs
-	BucketName string
-	TargetID   event.TargetID
-}
-
-// RemoteTargetExist - handles target ID exist RPC call which checks whether given target ID is a HTTP client target or not.
-func (receiver *peerRPCReceiver) RemoteTargetExist(args *RemoteTargetExistArgs, reply *bool) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	*reply = globalNotificationSys.RemoteTargetExist(args.BucketName, args.TargetID)
-	return nil
-}
-
-// SendEventArgs - send event RPC arguments.
-type SendEventArgs struct {
-	AuthArgs
-	Event      event.Event
-	TargetID   event.TargetID
-	BucketName string
-}
-
-// SendEvent - handles send event RPC call which sends given event to target by given target ID.
-func (receiver *peerRPCReceiver) SendEvent(args *SendEventArgs, reply *bool) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	// Set default to true to keep the target.
-	*reply = true
-	errs := globalNotificationSys.send(args.BucketName, args.Event, args.TargetID)
-
-	for i := range errs {
-		reqInfo := (&logger.ReqInfo{}).AppendTags("Event", args.Event.EventName.String())
-		reqInfo.AppendTags("targetName", args.TargetID.Name)
-		ctx := logger.SetReqInfo(context.Background(), reqInfo)
-		logger.LogIf(ctx, errs[i].Err)
-
-		*reply = false // send failed i.e. do not keep the target.
-		return errs[i].Err
-	}
-
-	return nil
-}
-
-// ReloadFormatArgs - send event RPC arguments.
-type ReloadFormatArgs struct {
-	AuthArgs
-	DryRun bool
-}
-
-// ReloadFormat - handles reload format RPC call, reloads latest `format.json`
-func (receiver *peerRPCReceiver) ReloadFormat(args *ReloadFormatArgs, reply *VoidReply) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-	return objAPI.ReloadFormat(context.Background(), args.DryRun)
-}
-
-// LoadUsers - handles load users RPC call.
-func (receiver *peerRPCReceiver) LoadUsers(args *AuthArgs, reply *VoidReply) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-	return globalIAMSys.Load(objAPI)
-}
-
-// LoadCredentials - handles load credentials RPC call.
-func (receiver *peerRPCReceiver) LoadCredentials(args *AuthArgs, reply *VoidReply) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	// Construct path to config.json for the given bucket.
-	configFile := path.Join(bucketConfigPrefix, minioConfigFile)
-	transactionConfigFile := configFile + ".transaction"
-
-	// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
-	// and configFile, take a transaction lock to avoid race.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, transactionConfigFile)
-	if err := objLock.GetRLock(globalOperationTimeout); err != nil {
-		return err
-	}
-	objLock.RUnlock()
-
-	return globalConfigSys.Load(newObjectLayerFn())
-}
-
-// DrivePerfInfo - handles drive performance RPC call
-func (receiver *peerRPCReceiver) DrivePerfInfo(args *AuthArgs, reply *ServerDrivesPerfInfo) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-
-	*reply = localEndpointsDrivePerf(globalEndpoints)
-	return nil
-}
-
-// CPULoadInfo - handles cpu performance RPC call
-func (receiver *peerRPCReceiver) CPULoadInfo(args *AuthArgs, reply *ServerCPULoadInfo) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-	*reply = localEndpointsCPULoad(globalEndpoints)
-	return nil
-}
-
-// MemUsageInfo - handles mem utilization RPC call
-func (receiver *peerRPCReceiver) MemUsageInfo(args *AuthArgs, reply *ServerMemUsageInfo) error {
-	objAPI := newObjectLayerFn()
-	if objAPI == nil {
-		return errServerNotInitialized
-	}
-	*reply = localEndpointsMemUsage(globalEndpoints)
-	return nil
-}
-
-// uptimes - used to sort uptimes in chronological order.
-type uptimes []time.Duration
-
-func (ts uptimes) Len() int {
-	return len(ts)
-}
-
-func (ts uptimes) Less(i, j int) bool {
-	return ts[i] < ts[j]
-}
-
-func (ts uptimes) Swap(i, j int) {
-	ts[i], ts[j] = ts[j], ts[i]
-}
-
-// getPeerUptimes - returns the uptime.
-func getPeerUptimes(serverInfo []ServerInfo) time.Duration {
-	// In a single node Erasure or FS backend setup the uptime of
-	// the setup is the uptime of the single minio server
-	// instance.
-	if !globalIsDistXL {
-		return UTCNow().Sub(globalBootTime)
-	}
-
-	var times []time.Duration
-
-	for _, info := range serverInfo {
-		if info.Error != "" {
-			continue
-		}
-		times = append(times, info.Data.Properties.Uptime)
-	}
-
-	// Sort uptimes in chronological order.
-	sort.Sort(uptimes(times))
-
-	// Return the latest time as the uptime.
-	return times[0]
-}
-
-// StartProfilingArgs - holds the RPC argument for StartingProfiling RPC call
-type StartProfilingArgs struct {
-	AuthArgs
-	Profiler string
-}
-
-// StartProfiling - profiling server receiver.
-func (receiver *peerRPCReceiver) StartProfiling(args *StartProfilingArgs, reply *VoidReply) error {
-	if globalProfiler != nil {
-		globalProfiler.Stop()
-	}
-	var err error
-	globalProfiler, err = startProfiler(args.Profiler, "")
-	return err
-}
-
-// DownloadProfilingData - download profiling data.
-func (receiver *peerRPCReceiver) DownloadProfilingData(args *AuthArgs, reply *[]byte) error {
-	var err error
-	*reply, err = getProfileData()
-	return err
-}
-
-var errUnsupportedSignal = fmt.Errorf("unsupported signal: only restart and stop signals are supported")
-
-// SignalServiceArgs - send event RPC arguments.
-type SignalServiceArgs struct {
-	AuthArgs
-	Sig serviceSignal
-}
-
-// SignalService - signal service receiver.
-func (receiver *peerRPCReceiver) SignalService(args *SignalServiceArgs, reply *VoidReply) error {
-	switch args.Sig {
-	case serviceRestart, serviceStop:
-		globalServiceSignalCh <- args.Sig
-	default:
-		return errUnsupportedSignal
-	}
-	return nil
-}
-
-// ServerInfo - server info receiver.
-func (receiver *peerRPCReceiver) ServerInfo(args *AuthArgs, reply *ServerInfoData) error {
-	if globalBootTime.IsZero() {
-		return errServerNotInitialized
-	}
-
-	// Build storage info
-	objLayer := newObjectLayerFn()
-	if objLayer == nil {
-		return errServerNotInitialized
-	}
-
-	// Server info data.
-	*reply = ServerInfoData{
-		StorageInfo: objLayer.StorageInfo(context.Background()),
-		ConnStats:   globalConnStats.toServerConnStats(),
-		HTTPStats:   globalHTTPStats.toServerHTTPStats(),
-		Properties: ServerProperties{
-			Uptime:   UTCNow().Sub(globalBootTime),
-			Version:  Version,
-			CommitID: CommitID,
-			SQSARN:   globalNotificationSys.GetARNList(),
-			Region:   globalServerConfig.GetRegion(),
-		},
-	}
-
-	return nil
-}
-
-// GetLocks - Get Locks receiver.
-func (receiver *peerRPCReceiver) GetLocks(args *AuthArgs, reply *GetLocksResp) error {
-	if globalBootTime.IsZero() {
-		return errServerNotInitialized
-	}
-
-	// Build storage info
-	objLayer := newObjectLayerFn()
-	if objLayer == nil {
-		return errServerNotInitialized
-	}
-
-	// Locks data.
-	*reply = globalLockServer.ll.DupLockMap()
-
-	return nil
-}
-
-// NewPeerRPCServer - returns new peer RPC server.
-func NewPeerRPCServer() (*xrpc.Server, error) {
-	rpcServer := xrpc.NewServer()
-	if err := rpcServer.RegisterName(peerServiceName, &peerRPCReceiver{}); err != nil {
-		return nil, err
-	}
-	return rpcServer, nil
-}
-
-// registerPeerRPCRouter - creates and registers Peer RPC server and its router.
-func registerPeerRPCRouter(router *mux.Router) {
-	rpcServer, err := NewPeerRPCServer()
-	logger.FatalIf(err, "Unable to initialize peer RPC Server")
-	subrouter := router.PathPrefix(minioReservedBucketPath).Subrouter()
-	subrouter.Path(peerServiceSubPath).HandlerFunc(httpTraceHdrs(rpcServer.ServeHTTP))
-}
@@ -232,7 +232,6 @@ func getDiskInfo(diskPath string) (di disk.Info, err error) {
 var ignoreDiskFreeOS = []string{
 	globalWindowsOSName,
 	globalNetBSDOSName,
-	globalSolarisOSName,
 }

 // check if disk total has minimum required size.
@@ -943,20 +942,6 @@ func (s *posix) openFile(volume, path string, mode int) (f *os.File, err error)
 	return w, nil
 }

-// Just like io.LimitedReader but supports Close() to be compatible with io.ReadCloser that is
-// returned by posix.ReadFileStream()
-type posixLimitedReader struct {
-	io.LimitedReader
-}
-
-func (l *posixLimitedReader) Close() error {
-	c, ok := l.R.(io.Closer)
-	if !ok {
-		return errUnexpected
-	}
-	return c.Close()
-}
-
 // ReadFileStream - Returns the read stream of the file.
 func (s *posix) ReadFileStream(volume, path string, offset, length int64) (io.ReadCloser, error) {
 	var err error
@@ -1030,7 +1015,10 @@ func (s *posix) ReadFileStream(volume, path string, offset, length int64) (io.Re
 	if _, err = file.Seek(offset, io.SeekStart); err != nil {
 		return nil, err
 	}
-	return &posixLimitedReader{io.LimitedReader{R: file, N: length}}, nil
+	return struct {
+		io.Reader
+		io.Closer
+	}{Reader: io.LimitReader(file, length), Closer: file}, nil
 }

 // CreateFile - creates the file.
@@ -1195,18 +1183,19 @@ func (s *posix) StatFile(volume, path string) (file FileInfo, err error) {
 	}
 	st, err := os.Stat((filePath))
 	if err != nil {
-		// File is really not found.
-		if os.IsNotExist(err) {
+		switch {
+		case os.IsNotExist(err):
+			// File is really not found.
 			return FileInfo{}, errFileNotFound
-		} else if isSysErrIO(err) {
+		case isSysErrIO(err):
 			return FileInfo{}, errFaultyDisk
-		} else if isSysErrNotDir(err) {
+		case isSysErrNotDir(err):
 			// File path cannot be verified since one of the parents is a file.
 			return FileInfo{}, errFileNotFound
+		default:
+			// Return all errors here.
+			return FileInfo{}, err
 		}
-
-		// Return all errors here.
-		return FileInfo{}, err
 	}
 	// If its a directory its not a regular file.
 	if st.Mode().IsDir() {
@@ -1231,21 +1220,21 @@ func deleteFile(basePath, deletePath string) error {

 	// Attempt to remove path.
 	if err := os.Remove((deletePath)); err != nil {
-		// Ignore errors if the directory is not empty. The server relies on
-		// this functionality, and sometimes uses recursion that should not
-		// error on parent directories.
-		if isSysErrNotEmpty(err) {
+		switch {
+		case isSysErrNotEmpty(err):
+			// Ignore errors if the directory is not empty. The server relies on
+			// this functionality, and sometimes uses recursion that should not
+			// error on parent directories.
 			return nil
-		}
-
-		if os.IsNotExist(err) {
+		case os.IsNotExist(err):
 			return errFileNotFound
-		} else if os.IsPermission(err) {
+		case os.IsPermission(err):
 			return errFileAccessDenied
-		} else if isSysErrIO(err) {
+		case isSysErrIO(err):
 			return errFaultyDisk
+		default:
+			return err
 		}
-		return err
 	}

 	// Trailing slash is removed when found to ensure
@@ -1369,9 +1358,18 @@ func (s *posix) RenameFile(srcVolume, srcPath, dstVolume, dstPath string) (err e
 		if err == nil && !isDirEmpty(dstFilePath) {
 			return errFileAccessDenied
 		}
-		if !os.IsNotExist(err) {
+		if err != nil && !os.IsNotExist(err) {
 			return err
 		}
+		// Empty destination remove it before rename.
+		if isDirEmpty(dstFilePath) {
+			if err = os.Remove(dstFilePath); err != nil {
+				if isSysErrNotEmpty(err) {
+					return errFileAccessDenied
+				}
+				return err
+			}
+		}
 	}

 	if err = renameAll(srcFilePath, dstFilePath); err != nil {
@@ -38,11 +38,12 @@ func registerDistXLRouters(router *mux.Router, endpoints EndpointList) {
 	// Register storage rpc router only if its a distributed setup.
 	registerStorageRESTHandlers(router, endpoints)

+	// Register peer REST router only if its a distributed setup.
+	registerPeerRESTHandlers(router)
+
 	// Register distributed namespace lock.
 	registerDistNSLockRouter(router)

-	// Register peer communication router.
-	registerPeerRPCRouter(router)
 }

 // List of some generic handlers which are applied for all incoming requests.
@@ -19,15 +19,16 @@ package cmd
 import (
 	"os"
 	"os/exec"
+	"syscall"
 )

 // Type of service signals currently supported.
-type serviceSignal int
+type serviceSignal string

 const (
-	serviceStatus  = iota // Gets status about the service.
-	serviceRestart        // Restarts the service.
-	serviceStop           // Stops the server.
+	serviceStatus  serviceSignal = "serviceStatus"  // Gets status about the service.
+	serviceRestart               = "serviceRestart" // Restarts the service.
+	serviceStop                  = "serviceStop"    // Stops the server.
 	// Add new service requests here.
 )

@@ -56,9 +57,7 @@ func restartProcess() error {
 		return err
 	}

-	// Pass on the environment and replace the old count key with the new one.
-	cmd := exec.Command(argv0, os.Args[1:]...)
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	return cmd.Start()
+	// Invokes the execve system call.
+	// Re-uses the same pid. This preserves the pid over multiple server-respawns.
+	return syscall.Exec(argv0, os.Args, os.Environ())
 }
@@ -66,7 +66,7 @@ func getReqAccessKeyV4(r *http.Request, region string, stype serviceType) (auth.

 // parse credentialHeader string into its structured form.
 func parseCredentialHeader(credElement string, region string, stype serviceType) (ch credentialHeader, aec APIErrorCode) {
-	creds := strings.Split(strings.TrimSpace(credElement), "=")
+	creds := strings.SplitN(strings.TrimSpace(credElement), "=", 2)
 	if len(creds) != 2 {
 		return ch, ErrMissingFields
 	}
@@ -216,6 +216,25 @@ func TestParseCredentialHeader(t *testing.T) {
 				"aws4_request"),
 			expectedErrCode: ErrNone,
 		},
+		// Test Case - 11.
+		// Test case with right inputs -> AccessKey contains `=`. See minio/#7376
+		// "aws4_request" is the valid request version.
+		{
+			inputCredentialStr: generateCredentialStr(
+				"LOCALKEY/DEV/1=",
+				sampleTimeStr,
+				"us-west-1",
+				"s3",
+				"aws4_request"),
+			expectedCredentials: generateCredentials(
+				t,
+				"LOCALKEY/DEV/1=",
+				sampleTimeStr,
+				"us-west-1",
+				"s3",
+				"aws4_request"),
+			expectedErrCode: ErrNone,
+		},
 	}

 	for i, testCase := range testCases {
@@ -66,9 +66,12 @@ var errVolumeNotEmpty = errors.New("volume is not empty")
 // errVolumeAccessDenied - cannot access volume, insufficient permissions.
 var errVolumeAccessDenied = errors.New("volume access denied")

-// errVolumeAccessDenied - cannot access file, insufficient permissions.
+// errFileAccessDenied - cannot access file, insufficient permissions.
 var errFileAccessDenied = errors.New("file access denied")

+// errFileParentIsFile - cannot have overlapping objects, parent is already a file.
+var errFileParentIsFile = errors.New("parent is a file")
+
 // errBitrotHashAlgoInvalid - the algo for bit-rot hash
 // verification is empty or invalid.
 var errBitrotHashAlgoInvalid = errors.New("bit-rot hash algorithm is invalid")
@@ -25,7 +25,6 @@ import (
 	"net/url"
 	"path"
 	"strconv"
-	"time"

 	"encoding/gob"
 	"encoding/hex"
@@ -38,10 +37,6 @@ import (
 	xnet "github.com/minio/minio/pkg/net"
 )

-// The timeout of TCP connect and sending/receiving
-// data for all internode storage REST requests.
-const storageRESTTimeout = 5 * time.Minute
-
 func isNetworkError(err error) bool {
 	if err == nil {
 		return false
@@ -405,7 +400,7 @@ func newStorageRESTClient(endpoint Endpoint) (*storageRESTClient, error) {
 		}
 	}

-	restClient, err := rest.NewClient(serverURL, tlsConfig, storageRESTTimeout, newAuthToken)
+	restClient, err := rest.NewClient(serverURL, tlsConfig, rest.DefaultRESTTimeout, newAuthToken)
 	if err != nil {
 		return nil, err
 	}
@@ -17,17 +17,14 @@
 package cmd

 import (
+	"encoding/gob"
+	"encoding/hex"
 	"errors"
 	"fmt"
 	"io"
+	"net/http"
 	"path"
 	"strconv"
-
-	"net/http"
-
-	"encoding/gob"
-	"encoding/hex"
-
 	"time"

 	"github.com/gorilla/mux"
@@ -47,6 +44,7 @@ type storageRESTServer struct {
 func (s *storageRESTServer) writeErrorResponse(w http.ResponseWriter, err error) {
 	w.WriteHeader(http.StatusForbidden)
 	w.Write([]byte(err.Error()))
+	w.(http.Flusher).Flush()
 }

 // Authenticates storage client's requests and validates for skewed time.
@@ -93,6 +91,7 @@ func (s *storageRESTServer) GetInstanceID(w http.ResponseWriter, r *http.Request
 	}
 	w.Header().Set("Content-Length", strconv.Itoa(len(s.instanceID)))
 	w.Write([]byte(s.instanceID))
+	w.(http.Flusher).Flush()
 }

 // DiskInfoHandler - returns disk info.
@@ -268,6 +267,7 @@ func (s *storageRESTServer) ReadAllHandler(w http.ResponseWriter, r *http.Reques
 	}
 	w.Header().Set("Content-Length", strconv.Itoa(len(buf)))
 	w.Write(buf)
+	w.(http.Flusher).Flush()
 }

 // ReadFileHandler - read section of a file.
@@ -311,6 +311,7 @@ func (s *storageRESTServer) ReadFileHandler(w http.ResponseWriter, r *http.Reque
 	}
 	w.Header().Set("Content-Length", strconv.Itoa(len(buf)))
 	w.Write(buf)
+	w.(http.Flusher).Flush()
 }

 // ReadFileHandler - read section of a file.
@@ -331,6 +332,7 @@ func (s *storageRESTServer) ReadFileStreamHandler(w http.ResponseWriter, r *http
 		s.writeErrorResponse(w, err)
 		return
 	}
+
 	rc, err := s.storage.ReadFileStream(volume, filePath, int64(offset), int64(length))
 	if err != nil {
 		s.writeErrorResponse(w, err)
@@ -338,7 +340,9 @@ func (s *storageRESTServer) ReadFileStreamHandler(w http.ResponseWriter, r *http
 	}
 	defer rc.Close()
 	w.Header().Set("Content-Length", strconv.Itoa(length))
+
 	io.Copy(w, rc)
+	w.(http.Flusher).Flush()
 }

 // ListDirHandler - list a directory.
@@ -33,7 +33,6 @@ type listParams struct {
 	recursive bool
 	marker    string
 	prefix    string
-	heal      bool
 }

 // errWalkAbort - returned by doTreeWalk() if it returns prematurely.
@@ -22,7 +22,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"net"
 	"net/http"
 	"net/url"
 	"os"
@@ -39,6 +38,7 @@ import (
 	"github.com/gorilla/rpc/v2/json2"
 	miniogopolicy "github.com/minio/minio-go/pkg/policy"
 	"github.com/minio/minio-go/pkg/s3utils"
+	"github.com/minio/minio-go/pkg/set"
 	"github.com/minio/minio/browser"
 	"github.com/minio/minio/cmd/crypto"
 	"github.com/minio/minio/cmd/logger"
@@ -296,24 +296,29 @@ func (web *webAPIHandlers) ListBuckets(r *http.Request, args *WebGenericArgs, re
 	// If etcd, dns federation configured list buckets from etcd.
 	if globalDNSConfig != nil {
 		dnsBuckets, err := globalDNSConfig.List()
-		if err != nil {
+		if err != nil && err != dns.ErrNoEntriesFound {
 			return toJSONError(err)
 		}
+		bucketSet := set.NewStringSet()
 		for _, dnsRecord := range dnsBuckets {
-			bucketName := strings.Trim(dnsRecord.Key, "/")
+			if bucketSet.Contains(dnsRecord.Key) {
+				continue
+			}

 			if globalIAMSys.IsAllowed(iampolicy.Args{
 				AccountName:     claims.Subject,
 				Action:          iampolicy.ListBucketAction,
-				BucketName:      bucketName,
+				BucketName:      dnsRecord.Key,
 				ConditionValues: getConditionValues(r, "", claims.Subject),
 				IsOwner:         owner,
 				ObjectName:      "",
 			}) {
 				reply.Buckets = append(reply.Buckets, WebBucketInfo{
-					Name:         bucketName,
+					Name:         dnsRecord.Key,
 					CreationDate: dnsRecord.CreationDate,
 				})
+
+				bucketSet.Add(dnsRecord.Key)
 			}
 		}
 	} else {
@@ -758,20 +763,11 @@ func (web *webAPIHandlers) SetAuth(r *http.Request, args *SetAuthArgs, reply *Se
 		return toJSONError(err)
 	}

-	if errs := globalNotificationSys.LoadCredentials(); len(errs) != 0 {
-		reply.PeerErrMsgs = make(map[string]string)
-		for _, nerr := range errs {
-			err = fmt.Errorf("Unable to update credentials on server %v: %v", nerr.Host, nerr.Err)
-			logger.LogIf(context.Background(), err)
-			reply.PeerErrMsgs[nerr.Host.String()] = err.Error()
-		}
-	} else {
-		reply.Token, err = authenticateWeb(creds.AccessKey, creds.SecretKey)
-		if err != nil {
-			return toJSONError(err)
-		}
-		reply.UIVersion = browser.UIVersion
+	reply.Token, err = authenticateWeb(creds.AccessKey, creds.SecretKey)
+	if err != nil {
+		return toJSONError(err)
 	}
+	reply.UIVersion = browser.UIVersion

 	return nil
 }
@@ -986,12 +982,6 @@ func (web *webAPIHandlers) Upload(w http.ResponseWriter, r *http.Request) {
 		}
 	}

-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	// Notify object created event.
 	sendEvent(eventArgs{
 		EventName:    event.ObjectCreatedPut,
@@ -1000,8 +990,7 @@ func (web *webAPIHandlers) Upload(w http.ResponseWriter, r *http.Request) {
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})
 }

@@ -1119,12 +1108,6 @@ func (web *webAPIHandlers) Download(w http.ResponseWriter, r *http.Request) {
 		}
 	}

-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
-
 	// Notify object accessed via a GET request.
 	sendEvent(eventArgs{
 		EventName:    event.ObjectAccessedGet,
@@ -1133,8 +1116,7 @@ func (web *webAPIHandlers) Download(w http.ResponseWriter, r *http.Request) {
 		ReqParams:    extractReqParams(r),
 		RespElements: extractRespElements(w),
 		UserAgent:    r.UserAgent(),
-		Host:         host,
-		Port:         port,
+		Host:         handlers.GetSourceIP(r),
 	})
 }

@@ -1149,11 +1131,7 @@ type DownloadZipArgs struct {

 // Takes a list of objects and creates a zip file that sent as the response body.
 func (web *webAPIHandlers) DownloadZip(w http.ResponseWriter, r *http.Request) {
-	// Get host and port from Request.RemoteAddr.
-	host, port, err := net.SplitHostPort(handlers.GetSourceIP(r))
-	if err != nil {
-		host, port = "", ""
-	}
+	host := handlers.GetSourceIP(r)

 	ctx := newContext(r, w, "WebDownloadZip")
 	defer logger.AuditLog(w, r, "WebDownloadZip", mustGetClaimsFromToken(r))
@@ -1338,7 +1316,6 @@ func (web *webAPIHandlers) DownloadZip(w http.ResponseWriter, r *http.Request) {
 				RespElements: extractRespElements(w),
 				UserAgent:    r.UserAgent(),
 				Host:         host,
-				Port:         port,
 			})

 			return nil
@@ -1792,67 +1769,50 @@ func toJSONError(err error, params ...string) (jerr *json2.Error) {

 // toWebAPIError - convert into error into APIError.
 func toWebAPIError(err error) APIError {
-	if err == errAuthentication {
-		return APIError{
-			Code:           "AccessDenied",
-			HTTPStatusCode: http.StatusForbidden,
-			Description:    err.Error(),
-		}
-	} else if err == errServerNotInitialized {
+	switch err {
+	case errServerNotInitialized:
 		return APIError{
 			Code:           "XMinioServerNotInitialized",
 			HTTPStatusCode: http.StatusServiceUnavailable,
 			Description:    err.Error(),
 		}
-	} else if err == auth.ErrInvalidAccessKeyLength {
+	case errAuthentication, auth.ErrInvalidAccessKeyLength, auth.ErrInvalidSecretKeyLength, errInvalidAccessKeyID:
 		return APIError{
 			Code:           "AccessDenied",
 			HTTPStatusCode: http.StatusForbidden,
 			Description:    err.Error(),
 		}
-	} else if err == auth.ErrInvalidSecretKeyLength {
-		return APIError{
-			Code:           "AccessDenied",
-			HTTPStatusCode: http.StatusForbidden,
-			Description:    err.Error(),
-		}
-	} else if err == errInvalidAccessKeyID {
-		return APIError{
-			Code:           "AccessDenied",
-			HTTPStatusCode: http.StatusForbidden,
-			Description:    err.Error(),
-		}
-	} else if err == errSizeUnspecified {
+	case errSizeUnspecified:
 		return APIError{
 			Code:           "InvalidRequest",
 			HTTPStatusCode: http.StatusBadRequest,
 			Description:    err.Error(),
 		}
-	} else if err == errChangeCredNotAllowed {
+	case errChangeCredNotAllowed:
 		return APIError{
 			Code:           "MethodNotAllowed",
 			HTTPStatusCode: http.StatusMethodNotAllowed,
 			Description:    err.Error(),
 		}
-	} else if err == errInvalidBucketName {
+	case errInvalidBucketName:
 		return APIError{
 			Code:           "InvalidBucketName",
 			HTTPStatusCode: http.StatusBadRequest,
 			Description:    err.Error(),
 		}
-	} else if err == errInvalidArgument {
+	case errInvalidArgument:
 		return APIError{
 			Code:           "InvalidArgument",
 			HTTPStatusCode: http.StatusBadRequest,
 			Description:    err.Error(),
 		}
-	} else if err == errEncryptedObject {
+	case errEncryptedObject:
 		return getAPIError(ErrSSEEncryptedObject)
-	} else if err == errInvalidEncryptionParameters {
+	case errInvalidEncryptionParameters:
 		return getAPIError(ErrInvalidEncryptionParameters)
-	} else if err == errObjectTampered {
+	case errObjectTampered:
 		return getAPIError(ErrObjectTampered)
-	} else if err == errMethodNotAllowed {
+	case errMethodNotAllowed:
 		return getAPIError(ErrMethodNotAllowed)
 	}

@@ -725,7 +725,7 @@ func (s *xlSets) ListObjects(ctx context.Context, bucket, prefix, marker, delimi
 		recursive = false
 	}

-	walkResultCh, endWalkCh := s.listPool.Release(listParams{bucket, recursive, marker, prefix, false})
+	walkResultCh, endWalkCh := s.listPool.Release(listParams{bucket, recursive, marker, prefix})
 	if walkResultCh == nil {
 		endWalkCh = make(chan struct{})
 		isLeaf := func(bucket, entry string) bool {
@@ -798,7 +798,7 @@ func (s *xlSets) ListObjects(ctx context.Context, bucket, prefix, marker, delimi
 		}
 	}

-	params := listParams{bucket, recursive, nextMarker, prefix, false}
+	params := listParams{bucket, recursive, nextMarker, prefix}
 	if !eof {
 		s.listPool.Set(params, walkResultCh, endWalkCh)
 	}
@@ -1010,9 +1010,6 @@ func (s *xlSets) ReloadFormat(ctx context.Context, dryRun bool) (err error) {
 // If it is a single node XL and all disks are root disks, it is most likely a test setup, else it is a production setup.
 // On a test setup we allow creation of format.json on root disks to help with dev/testing.
 func isTestSetup(infos []DiskInfo, errs []error) bool {
-	if globalIsDistXL {
-		return false
-	}
 	rootDiskCount := 0
 	for i := range errs {
 		if errs[i] != nil {
@@ -1299,8 +1296,8 @@ func (s *xlSets) HealBucket(ctx context.Context, bucket string, dryRun, remove b
 }

 // HealObject - heals inconsistent object on a hashedSet based on object name.
-func (s *xlSets) HealObject(ctx context.Context, bucket, object string, dryRun, remove bool) (madmin.HealResultItem, error) {
-	return s.getHashedSet(object).HealObject(ctx, bucket, object, dryRun, remove)
+func (s *xlSets) HealObject(ctx context.Context, bucket, object string, dryRun, remove bool, scanMode madmin.HealScanMode) (madmin.HealResultItem, error) {
+	return s.getHashedSet(object).HealObject(ctx, bucket, object, dryRun, remove, scanMode)
 }

 // Lists all buckets which need healing.
@@ -1322,110 +1319,38 @@ func (s *xlSets) ListBucketsHeal(ctx context.Context) ([]BucketInfo, error) {
 	return listBuckets, nil
 }

-// listObjectsHeal - wrapper function implemented over file tree walk.
-func (s *xlSets) listObjectsHeal(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (loi ListObjectsInfo, e error) {
-	// Default is recursive, if delimiter is set then list non recursive.
+// HealObjects - Heal all objects recursively at a specified prefix, any
+// dangling objects deleted as well automatically.
+func (s *xlSets) HealObjects(ctx context.Context, bucket, prefix string, healObjectFn func(string, string) error) (err error) {
 	recursive := true
-	if delimiter == slashSeparator {
-		recursive = false
+
+	endWalkCh := make(chan struct{})
+	isLeaf := func(bucket, entry string) bool {
+		return hasSuffix(entry, xlMetaJSONFile)
 	}

-	// "heal" true for listObjectsHeal() and false for listObjects()
-	walkResultCh, endWalkCh := s.listPool.Release(listParams{bucket, recursive, marker, prefix, true})
-	if walkResultCh == nil {
-		endWalkCh = make(chan struct{})
-		isLeaf := func(bucket, entry string) bool {
-			entry = strings.TrimSuffix(entry, slashSeparator)
-			// Verify if we are at the leaf, a leaf is where we
-			// see `xl.json` inside a directory.
-			return s.getHashedSet(entry).isObject(bucket, entry)
-		}
-
-		isLeafDir := func(bucket, entry string) bool {
-			var ok bool
-			for _, set := range s.sets {
-				ok = set.isObjectDir(bucket, entry)
-				if ok {
-					return true
-				}
-			}
-			return false
-		}
-
-		listDir := listDirSetsFactory(ctx, isLeaf, isLeafDir, s.sets...)
-		walkResultCh = startTreeWalk(ctx, bucket, prefix, marker, recursive, listDir, isLeaf, isLeafDir, endWalkCh)
+	isLeafDir := func(bucket, entry string) bool {
+		return false
 	}

-	var objInfos []ObjectInfo
-	var eof bool
-	var nextMarker string
-	for i := 0; i < maxKeys; {
+	listDir := listDirSetsFactory(ctx, isLeaf, isLeafDir, s.sets...)
+	walkResultCh := startTreeWalk(ctx, bucket, prefix, "", recursive, listDir, isLeaf, isLeafDir, endWalkCh)
+	for {
 		walkResult, ok := <-walkResultCh
 		if !ok {
-			// Closed channel.
-			eof = true
 			break
 		}
 		// For any walk error return right away.
 		if walkResult.err != nil {
-			return loi, toObjectErr(walkResult.err, bucket, prefix)
+			return toObjectErr(walkResult.err, bucket, prefix)
+		}
+		if err := healObjectFn(bucket, strings.TrimSuffix(walkResult.entry, slashSeparator+xlMetaJSONFile)); err != nil {
+			return toObjectErr(err, bucket, walkResult.entry)
 		}
-		var objInfo ObjectInfo
-		objInfo.Bucket = bucket
-		objInfo.Name = walkResult.entry
-		nextMarker = objInfo.Name
-		objInfos = append(objInfos, objInfo)
-		i++
 		if walkResult.end {
-			eof = true
 			break
 		}
 	}

-	params := listParams{bucket, recursive, nextMarker, prefix, true}
-	if !eof {
-		s.listPool.Set(params, walkResultCh, endWalkCh)
-	}
-
-	result := ListObjectsInfo{IsTruncated: !eof}
-	for _, objInfo := range objInfos {
-		result.NextMarker = objInfo.Name
-		result.Objects = append(result.Objects, objInfo)
-	}
-	return result, nil
-}
-
-// This is not implemented yet, will be implemented later to comply with Admin API refactor.
-func (s *xlSets) ListObjectsHeal(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (loi ListObjectsInfo, err error) {
-	if err = checkListObjsArgs(ctx, bucket, prefix, marker, delimiter, s); err != nil {
-		return loi, err
-	}
-
-	// With max keys of zero we have reached eof, return right here.
-	if maxKeys == 0 {
-		return loi, nil
-	}
-
-	// For delimiter and prefix as '/' we do not list anything at all
-	// since according to s3 spec we stop at the 'delimiter' along
-	// with the prefix. On a flat namespace with 'prefix' as '/'
-	// we don't have any entries, since all the keys are of form 'keyName/...'
-	if delimiter == slashSeparator && prefix == slashSeparator {
-		return loi, nil
-	}
-
-	// Over flowing count - reset to maxObjectList.
-	if maxKeys < 0 || maxKeys > maxObjectList {
-		maxKeys = maxObjectList
-	}
-
-	// Initiate a list operation, if successful filter and return quickly.
-	listObjInfo, err := s.listObjectsHeal(ctx, bucket, prefix, marker, delimiter, maxKeys)
-	if err == nil {
-		// We got the entries successfully return.
-		return listObjInfo, nil
-	}
-
-	// Return error at the end.
-	return loi, toObjectErr(err, bucket, prefix)
+	return nil
 }
@@ -22,6 +22,7 @@ import (
 	"time"

 	"github.com/minio/minio/cmd/logger"
+	"github.com/minio/minio/pkg/madmin"
 )

 // commonTime returns a maximally occurring time from a list of time.
@@ -158,37 +159,48 @@ func getLatestXLMeta(ctx context.Context, partsMetadata []xlMetaV1, errs []error
 // - slice of errors about the state of data files on disk - can have
 //   a not-found error or a hash-mismatch error.
 func disksWithAllParts(ctx context.Context, onlineDisks []StorageAPI, partsMetadata []xlMetaV1, errs []error, bucket,
-	object string) ([]StorageAPI, []error) {
+	object string, scanMode madmin.HealScanMode) ([]StorageAPI, []error) {
 	availableDisks := make([]StorageAPI, len(onlineDisks))
 	dataErrs := make([]error, len(onlineDisks))

 	for i, onlineDisk := range onlineDisks {
 		if onlineDisk == nil {
-			dataErrs[i] = errDiskNotFound
+			dataErrs[i] = errs[i]
 			continue
 		}

-		erasureInfo := partsMetadata[i].Erasure
-		erasure, err := NewErasure(ctx, erasureInfo.DataBlocks, erasureInfo.ParityBlocks, erasureInfo.BlockSize)
-		if err != nil {
-			dataErrs[i] = err
-			continue
-		}
-
-		// disk has a valid xl.json but may not have all the
-		// parts. This is considered an outdated disk, since
-		// it needs healing too.
-		for _, part := range partsMetadata[i].Parts {
-			checksumInfo := erasureInfo.GetChecksumInfo(part.Name)
-			tillOffset := erasure.ShardFileTillOffset(0, part.Size, part.Size)
-			err = bitrotCheckFile(onlineDisk, bucket, pathJoin(object, part.Name), tillOffset, checksumInfo.Algorithm, checksumInfo.Hash, erasure.ShardSize())
+		switch scanMode {
+		case madmin.HealDeepScan:
+			erasureInfo := partsMetadata[i].Erasure
+			erasure, err := NewErasure(ctx, erasureInfo.DataBlocks, erasureInfo.ParityBlocks, erasureInfo.BlockSize)
 			if err != nil {
-				isCorrupt := strings.HasPrefix(err.Error(), "Bitrot verification mismatch - expected ")
-				if !isCorrupt && err != errFileNotFound && err != errVolumeNotFound {
-					logger.LogIf(ctx, err)
-				}
 				dataErrs[i] = err
-				break
+				continue
+			}
+
+			// disk has a valid xl.json but may not have all the
+			// parts. This is considered an outdated disk, since
+			// it needs healing too.
+			for _, part := range partsMetadata[i].Parts {
+				checksumInfo := erasureInfo.GetChecksumInfo(part.Name)
+				tillOffset := erasure.ShardFileTillOffset(0, part.Size, part.Size)
+				err = bitrotCheckFile(onlineDisk, bucket, pathJoin(object, part.Name), tillOffset, checksumInfo.Algorithm, checksumInfo.Hash, erasure.ShardSize())
+				if err != nil {
+					isCorrupt := strings.HasPrefix(err.Error(), "Bitrot verification mismatch - expected ")
+					if !isCorrupt && err != errFileNotFound && err != errVolumeNotFound {
+						logger.LogIf(ctx, err)
+					}
+					dataErrs[i] = err
+					break
+				}
+			}
+		case madmin.HealNormalScan:
+			for _, part := range partsMetadata[i].Parts {
+				_, err := onlineDisk.StatFile(bucket, pathJoin(object, part.Name))
+				if err != nil {
+					dataErrs[i] = err
+					break
+				}
 			}
 		}

@@ -23,6 +23,8 @@ import (
 	"path/filepath"
 	"testing"
 	"time"
+
+	"github.com/minio/minio/pkg/madmin"
 )

 // validates functionality provided to find most common
@@ -239,7 +241,7 @@ func TestListOnlineDisks(t *testing.T) {
 				i+1, test.expectedTime, modTime)
 		}

-		availableDisks, newErrs := disksWithAllParts(context.Background(), onlineDisks, partsMetadata, test.errs, bucket, object)
+		availableDisks, newErrs := disksWithAllParts(context.Background(), onlineDisks, partsMetadata, test.errs, bucket, object, madmin.HealDeepScan)
 		test.errs = newErrs

 		if test._tamperBackend != noTamper {
@@ -291,7 +293,7 @@ func TestDisksWithAllParts(t *testing.T) {
 		t.Fatalf("Failed to read xl meta data %v", err)
 	}

-	filteredDisks, errs := disksWithAllParts(ctx, xlDisks, partsMetadata, errs, bucket, object)
+	filteredDisks, errs := disksWithAllParts(ctx, xlDisks, partsMetadata, errs, bucket, object, madmin.HealDeepScan)

 	if len(filteredDisks) != len(xlDisks) {
 		t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
@@ -328,7 +330,7 @@ func TestDisksWithAllParts(t *testing.T) {
 	}

 	errs = make([]error, len(xlDisks))
-	filteredDisks, errs = disksWithAllParts(ctx, xlDisks, partsMetadata, errs, bucket, object)
+	filteredDisks, errs = disksWithAllParts(ctx, xlDisks, partsMetadata, errs, bucket, object, madmin.HealDeepScan)

 	if len(filteredDisks) != len(xlDisks) {
 		t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
@@ -207,39 +207,29 @@ func shouldHealObjectOnDisk(xlErr, dataErr error, meta xlMetaV1, quorumModTime t
 }

 // Heals an object by re-writing corrupt/missing erasure blocks.
-func healObject(ctx context.Context, storageDisks []StorageAPI, bucket string, object string,
-	quorum int, dryRun bool) (result madmin.HealResultItem, err error) {
-	partsMetadata, errs := readAllXLMetadata(ctx, storageDisks, bucket, object)
+func (xl xlObjects) healObject(ctx context.Context, bucket string, object string,
+	partsMetadata []xlMetaV1, errs []error, latestXLMeta xlMetaV1,
+	dryRun bool, remove bool, scanMode madmin.HealScanMode) (result madmin.HealResultItem, err error) {

-	errCount := 0
-	for _, err := range errs {
-		if err != nil {
-			errCount++
-		}
-	}
+	dataBlocks := latestXLMeta.Erasure.DataBlocks

-	if errCount == len(errs) {
-		// Only if we get errors from all the disks we return error. Else we need to
-		// continue to return filled madmin.HealResultItem struct which includes info
-		// on what disks the file is available etc.
-		if reducedErr := reduceReadQuorumErrs(ctx, errs, nil, quorum); reducedErr != nil {
-			return defaultHealResult(storageDisks, errs, bucket, object), toObjectErr(reducedErr, bucket, object)
-		}
-	}
+	storageDisks := xl.getDisks()

 	// List of disks having latest version of the object xl.json
 	// (by modtime).
 	latestDisks, modTime := listOnlineDisks(storageDisks, partsMetadata, errs)

 	// List of disks having all parts as per latest xl.json.
-	availableDisks, dataErrs := disksWithAllParts(ctx, latestDisks, partsMetadata, errs, bucket, object)
+	availableDisks, dataErrs := disksWithAllParts(ctx, latestDisks, partsMetadata, errs, bucket, object, scanMode)

 	// Initialize heal result object
 	result = madmin.HealResultItem{
-		Type:      madmin.HealItemObject,
-		Bucket:    bucket,
-		Object:    object,
-		DiskCount: len(storageDisks),
+		Type:         madmin.HealItemObject,
+		Bucket:       bucket,
+		Object:       object,
+		DiskCount:    len(storageDisks),
+		ParityBlocks: latestXLMeta.Erasure.ParityBlocks,
+		DataBlocks:   latestXLMeta.Erasure.DataBlocks,

 		// Initialize object size to -1, so we can detect if we are
 		// unable to reliably find the object size.
@@ -307,11 +297,18 @@ func healObject(ctx context.Context, storageDisks []StorageAPI, bucket string, o

 	// If less than read quorum number of disks have all the parts
 	// of the data, we can't reconstruct the erasure-coded data.
-	if numAvailableDisks < quorum {
-		// Default to most common configuration for erasure
-		// blocks upon returning quorum error.
-		result.ParityBlocks = len(storageDisks) / 2
-		result.DataBlocks = len(storageDisks) / 2
+	if numAvailableDisks < dataBlocks {
+		// Check if xl.json, and corresponding parts are also missing.
+		if m, ok := isObjectDangling(partsMetadata, errs, dataErrs); ok {
+			writeQuorum := m.Erasure.DataBlocks + 1
+			if m.Erasure.DataBlocks == 0 {
+				writeQuorum = len(storageDisks)/2 + 1
+			}
+			if !dryRun && remove {
+				err = xl.deleteObject(ctx, bucket, object, writeQuorum, false)
+			}
+			return defaultHealResult(latestXLMeta, storageDisks, errs, bucket, object), err
+		}
 		return result, toObjectErr(errXLReadQuorum, bucket, object)
 	}

@@ -328,7 +325,7 @@ func healObject(ctx context.Context, storageDisks []StorageAPI, bucket string, o

 	// Latest xlMetaV1 for reference. If a valid metadata is not
 	// present, it is as good as object not found.
-	latestMeta, pErr := pickValidXLMeta(ctx, partsMetadata, modTime, quorum)
+	latestMeta, pErr := pickValidXLMeta(ctx, partsMetadata, modTime, dataBlocks)
 	if pErr != nil {
 		return result, toObjectErr(pErr, bucket, object)
 	}
@@ -533,7 +530,7 @@ func (xl xlObjects) healObjectDir(ctx context.Context, bucket, object string, dr

 // Populates default heal result item entries with possible values when we are returning prematurely.
 // This is to ensure that in any circumstance we are not returning empty arrays with wrong values.
-func defaultHealResult(storageDisks []StorageAPI, errs []error, bucket, object string) madmin.HealResultItem {
+func defaultHealResult(latestXLMeta xlMetaV1, storageDisks []StorageAPI, errs []error, bucket, object string) madmin.HealResultItem {
 	// Initialize heal result object
 	result := madmin.HealResultItem{
 		Type:      madmin.HealItemObject,
@@ -545,6 +542,9 @@ func defaultHealResult(storageDisks []StorageAPI, errs []error, bucket, object s
 		// unable to reliably find the object size.
 		ObjectSize: -1,
 	}
+	if latestXLMeta.IsValid() {
+		result.ObjectSize = latestXLMeta.Stat.Size
+	}

 	for index, disk := range storageDisks {
 		if disk == nil {
@@ -576,9 +576,14 @@ func defaultHealResult(storageDisks []StorageAPI, errs []error, bucket, object s
 		})
 	}

-	// Default to most common configuration for erasure blocks.
-	result.ParityBlocks = len(storageDisks) / 2
-	result.DataBlocks = len(storageDisks) / 2
+	if !latestXLMeta.IsValid() {
+		// Default to most common configuration for erasure blocks.
+		result.ParityBlocks = len(storageDisks) / 2
+		result.DataBlocks = len(storageDisks) / 2
+	} else {
+		result.ParityBlocks = latestXLMeta.Erasure.ParityBlocks
+		result.DataBlocks = latestXLMeta.Erasure.DataBlocks
+	}

 	return result
 }
@@ -586,7 +591,7 @@ func defaultHealResult(storageDisks []StorageAPI, errs []error, bucket, object s
 // Object is considered dangling/corrupted if any only
 // if total disks - a combination of corrupted and missing
 // files is lesser than number of data blocks.
-func (xl xlObjects) isObjectDangling(metaArr []xlMetaV1, errs []error) (validMeta xlMetaV1, ok bool) {
+func isObjectDangling(metaArr []xlMetaV1, errs []error, dataErrs []error) (validMeta xlMetaV1, ok bool) {
 	// We can consider an object data not reliable
 	// when xl.json is not found in read quorum disks.
 	// or when xl.json is not readable in read quorum disks.
@@ -598,6 +603,18 @@ func (xl xlObjects) isObjectDangling(metaArr []xlMetaV1, errs []error) (validMet
 			corruptedXLJSON++
 		}
 	}
+	var notFoundParts int
+	for i := range dataErrs {
+		// Only count part errors, if the error is not
+		// same as xl.json error. This is to avoid
+		// double counting when both parts and xl.json
+		// are not available.
+		if errs[i] != dataErrs[i] {
+			if dataErrs[i] == errFileNotFound {
+				notFoundParts++
+			}
+		}
+	}

 	for _, m := range metaArr {
 		if !m.IsValid() {
@@ -612,16 +629,12 @@ func (xl xlObjects) isObjectDangling(metaArr []xlMetaV1, errs []error) (validMet
 		return validMeta, true
 	}

-	// We have valid meta, now verify if we have enough files with data blocks.
-	return validMeta, (len(xl.getDisks()) - corruptedXLJSON - notFoundXLJSON) < validMeta.Erasure.DataBlocks
+	// We have valid meta, now verify if we have enough files with parity blocks.
+	return validMeta, corruptedXLJSON+notFoundXLJSON+notFoundParts > validMeta.Erasure.ParityBlocks
 }

-// HealObject - heal the given object.
-//
-// FIXME: If an object object was deleted and one disk was down,
-// and later the disk comes back up again, heal on the object
-// should delete it.
-func (xl xlObjects) HealObject(ctx context.Context, bucket, object string, dryRun bool, remove bool) (hr madmin.HealResultItem, err error) {
+// HealObject - heal the given object, automatically deletes the object if stale/corrupted if `remove` is true.
+func (xl xlObjects) HealObject(ctx context.Context, bucket, object string, dryRun bool, remove bool, scanMode madmin.HealScanMode) (hr madmin.HealResultItem, err error) {
 	// Create context that also contains information about the object and bucket.
 	// The top level handler might not have this information.
 	reqInfo := logger.GetReqInfo(ctx)
@@ -640,13 +653,12 @@ func (xl xlObjects) HealObject(ctx context.Context, bucket, object string, dryRu

 	storageDisks := xl.getDisks()

-	// FIXME: Metadata is read again in the healObject() call below.
 	// Read metadata files from all the disks
 	partsMetadata, errs := readAllXLMetadata(healCtx, storageDisks, bucket, object)

 	// Check if the object is dangling, if yes and user requested
 	// remove we simply delete it from namespace.
-	if m, ok := xl.isObjectDangling(partsMetadata, errs); ok {
+	if m, ok := isObjectDangling(partsMetadata, errs, []error{}); ok {
 		writeQuorum := m.Erasure.DataBlocks + 1
 		if m.Erasure.DataBlocks == 0 {
 			writeQuorum = len(xl.getDisks())/2 + 1
@@ -654,21 +666,46 @@ func (xl xlObjects) HealObject(ctx context.Context, bucket, object string, dryRu
 		if !dryRun && remove {
 			err = xl.deleteObject(healCtx, bucket, object, writeQuorum, false)
 		}
-		return defaultHealResult(storageDisks, errs, bucket, object), err
+		return defaultHealResult(xlMetaV1{}, storageDisks, errs, bucket, object), err
 	}

 	latestXLMeta, err := getLatestXLMeta(healCtx, partsMetadata, errs)
 	if err != nil {
-		return defaultHealResult(storageDisks, errs, bucket, object), toObjectErr(err, bucket, object)
+		return defaultHealResult(xlMetaV1{}, storageDisks, errs, bucket, object), toObjectErr(err, bucket, object)
 	}

 	// Lock the object before healing.
 	objectLock := xl.nsMutex.NewNSLock(bucket, object)
 	if lerr := objectLock.GetRLock(globalHealingTimeout); lerr != nil {
-		return defaultHealResult(storageDisks, errs, bucket, object), lerr
+		return defaultHealResult(latestXLMeta, storageDisks, errs, bucket, object), lerr
 	}
 	defer objectLock.RUnlock()

+	errCount := 0
+	for _, err := range errs {
+		if err != nil {
+			errCount++
+		}
+	}
+
+	if errCount == len(errs) {
+		// Only if we get errors from all the disks we return error. Else we need to
+		// continue to return filled madmin.HealResultItem struct which includes info
+		// on what disks the file is available etc.
+		if reducedErr := reduceReadQuorumErrs(ctx, errs, nil, latestXLMeta.Erasure.DataBlocks); reducedErr != nil {
+			if m, ok := isObjectDangling(partsMetadata, errs, []error{}); ok {
+				writeQuorum := m.Erasure.DataBlocks + 1
+				if m.Erasure.DataBlocks == 0 {
+					writeQuorum = len(storageDisks)/2 + 1
+				}
+				if !dryRun && remove {
+					err = xl.deleteObject(ctx, bucket, object, writeQuorum, false)
+				}
+			}
+			return defaultHealResult(latestXLMeta, storageDisks, errs, bucket, object), toObjectErr(reducedErr, bucket, object)
+		}
+	}
+
 	// Heal the object.
-	return healObject(healCtx, xl.getDisks(), bucket, object, latestXLMeta.Erasure.DataBlocks, dryRun)
+	return xl.healObject(healCtx, bucket, object, partsMetadata, errs, latestXLMeta, dryRun, remove, scanMode)
 }
@@ -21,6 +21,8 @@ import (
 	"context"
 	"path/filepath"
 	"testing"
+
+	"github.com/minio/minio/pkg/madmin"
 )

 // Tests undoes and validates if the undoing completes successfully.
@@ -56,6 +58,91 @@ func TestUndoMakeBucket(t *testing.T) {
 	}
 }

+func TestHealObjectCorrupted(t *testing.T) {
+	nDisks := 16
+	fsDirs, err := getRandomDisks(nDisks)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	defer removeRoots(fsDirs)
+
+	// Everything is fine, should return nil
+	obj, _, err := initObjectLayer(mustGetNewEndpointList(fsDirs...))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	bucket := "bucket"
+	object := "object"
+	data := bytes.Repeat([]byte("a"), 5*1024*1024)
+	var opts ObjectOptions
+
+	err = obj.MakeBucketWithLocation(context.Background(), bucket, "")
+	if err != nil {
+		t.Fatalf("Failed to make a bucket - %v", err)
+	}
+
+	// Create an object with multiple parts uploaded in decreasing
+	// part number.
+	uploadID, err := obj.NewMultipartUpload(context.Background(), bucket, object, opts)
+	if err != nil {
+		t.Fatalf("Failed to create a multipart upload - %v", err)
+	}
+
+	var uploadedParts []CompletePart
+	for _, partID := range []int{2, 1} {
+		pInfo, err1 := obj.PutObjectPart(context.Background(), bucket, object, uploadID, partID, mustGetPutObjReader(t, bytes.NewReader(data), int64(len(data)), "", ""), opts)
+		if err1 != nil {
+			t.Fatalf("Failed to upload a part - %v", err1)
+		}
+		uploadedParts = append(uploadedParts, CompletePart{
+			PartNumber: pInfo.PartNumber,
+			ETag:       pInfo.ETag,
+		})
+	}
+
+	_, err = obj.CompleteMultipartUpload(context.Background(), bucket, object, uploadID, uploadedParts, ObjectOptions{})
+	if err != nil {
+		t.Fatalf("Failed to complete multipart upload - %v", err)
+	}
+
+	// Remove the object backend files from the first disk.
+	xl := obj.(*xlObjects)
+	firstDisk := xl.storageDisks[0]
+	err = firstDisk.DeleteFile(bucket, filepath.Join(object, xlMetaJSONFile))
+	if err != nil {
+		t.Fatalf("Failed to delete a file - %v", err)
+	}
+
+	_, err = obj.HealObject(context.Background(), bucket, object, false, false, madmin.HealNormalScan)
+	if err != nil {
+		t.Fatalf("Failed to heal object - %v", err)
+	}
+
+	_, err = firstDisk.StatFile(bucket, filepath.Join(object, xlMetaJSONFile))
+	if err != nil {
+		t.Errorf("Expected xl.json file to be present but stat failed - %v", err)
+	}
+
+	// Delete xl.json from more than read quorum number of disks, to create a corrupted situation.
+	for i := 0; i <= len(xl.storageDisks)/2; i++ {
+		xl.storageDisks[i].DeleteFile(bucket, filepath.Join(object, xlMetaJSONFile))
+	}
+
+	// Try healing now, expect to receive errDiskNotFound.
+	_, err = obj.HealObject(context.Background(), bucket, object, false, true, madmin.HealDeepScan)
+	if err != nil {
+		t.Errorf("Expected nil but received %v", err)
+	}
+
+	// since majority of xl.jsons are not available, object should be successfully deleted.
+	_, err = obj.GetObjectInfo(context.Background(), bucket, object, ObjectOptions{})
+	if _, ok := err.(ObjectNotFound); !ok {
+		t.Errorf("Expect %v but received %v", ObjectNotFound{Bucket: bucket, Object: object}, err)
+	}
+}
+
 // Tests healing of object.
 func TestHealObjectXL(t *testing.T) {
 	nDisks := 16
@@ -114,7 +201,7 @@ func TestHealObjectXL(t *testing.T) {
 		t.Fatalf("Failed to delete a file - %v", err)
 	}

-	_, err = obj.HealObject(context.Background(), bucket, object, false, false)
+	_, err = obj.HealObject(context.Background(), bucket, object, false, false, madmin.HealNormalScan)
 	if err != nil {
 		t.Fatalf("Failed to heal object - %v", err)
 	}
@@ -130,7 +217,7 @@ func TestHealObjectXL(t *testing.T) {
 	}

 	// Try healing now, expect to receive errDiskNotFound.
-	_, err = obj.HealObject(context.Background(), bucket, object, false, false)
+	_, err = obj.HealObject(context.Background(), bucket, object, false, false, madmin.HealDeepScan)
 	// since majority of xl.jsons are not available, object quorum can't be read properly and error will be errXLReadQuorum
 	if _, ok := err.(InsufficientReadQuorum); !ok {
 		t.Errorf("Expected %v but received %v", InsufficientReadQuorum{}, err)
@@ -23,7 +23,7 @@ func (xl xlObjects) ListBucketsHeal(ctx context.Context) ([]BucketInfo, error) {
 	return nil, nil
 }

-// This is not implemented/needed anymore, look for xl-sets.ListObjectsHeal()
-func (xl xlObjects) ListObjectsHeal(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (loi ListObjectsInfo, e error) {
-	return loi, nil
+// This is not implemented/needed anymore, look for xl-sets.HealObjects()
+func (xl xlObjects) HealObjects(ctx context.Context, bucket, prefix string, healFn func(string, string) error) (e error) {
+	return nil
 }
@@ -69,8 +69,7 @@ func (xl xlObjects) listObjects(ctx context.Context, bucket, prefix, marker, del
 		recursive = false
 	}

-	heal := false // true only for xl.ListObjectsHeal
-	walkResultCh, endWalkCh := xl.listPool.Release(listParams{bucket, recursive, marker, prefix, heal})
+	walkResultCh, endWalkCh := xl.listPool.Release(listParams{bucket, recursive, marker, prefix})
 	if walkResultCh == nil {
 		endWalkCh = make(chan struct{})
 		isLeaf := xl.isObject
@@ -125,7 +124,7 @@ func (xl xlObjects) listObjects(ctx context.Context, bucket, prefix, marker, del
 		}
 	}

-	params := listParams{bucket, recursive, nextMarker, prefix, heal}
+	params := listParams{bucket, recursive, nextMarker, prefix}
 	if !eof {
 		xl.listPool.Set(params, walkResultCh, endWalkCh)
 	}
@@ -624,7 +624,7 @@ func (xl xlObjects) CompleteMultipartUpload(ctx context.Context, bucket string,
 	// Check if an object is present as one of the parent dir.
 	// -- FIXME. (needs a new kind of lock).
 	if xl.parentDirIsObject(ctx, bucket, path.Dir(object)) {
-		return oi, toObjectErr(errFileAccessDenied, bucket, object)
+		return oi, toObjectErr(errFileParentIsFile, bucket, object)
 	}

 	// Calculate s3 compatible md5sum for complete multipart.
@@ -577,7 +577,7 @@ func (xl xlObjects) putObject(ctx context.Context, bucket string, object string,
 		// -- FIXME. (needs a new kind of lock).
 		// -- FIXME (this also causes performance issue when disks are down).
 		if xl.parentDirIsObject(ctx, bucket, path.Dir(object)) {
-			return ObjectInfo{}, toObjectErr(errFileAccessDenied, bucket, object)
+			return ObjectInfo{}, toObjectErr(errFileParentIsFile, bucket, object)
 		}

 		if err = xl.putObjectDir(ctx, minioMetaTmpBucket, tempObj, writeQuorum); err != nil {
@@ -608,7 +608,7 @@ func (xl xlObjects) putObject(ctx context.Context, bucket string, object string,
 	// -- FIXME. (needs a new kind of lock).
 	// -- FIXME (this also causes performance issue when disks are down).
 	if xl.parentDirIsObject(ctx, bucket, path.Dir(object)) {
-		return ObjectInfo{}, toObjectErr(errFileAccessDenied, bucket, object)
+		return ObjectInfo{}, toObjectErr(errFileParentIsFile, bucket, object)
 	}

 	// Limit the reader to its provided size if specified.
@@ -28,6 +28,7 @@ import (
 	"time"

 	humanize "github.com/dustin/go-humanize"
+	"github.com/minio/minio/pkg/madmin"
 )

 func TestRepeatPutObjectPart(t *testing.T) {
@@ -308,7 +309,7 @@ func TestHealing(t *testing.T) {
 		t.Fatal(err)
 	}

-	_, err = xl.HealObject(context.Background(), bucket, object, false, false)
+	_, err = xl.HealObject(context.Background(), bucket, object, false, false, madmin.HealNormalScan)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -337,7 +338,7 @@ func TestHealing(t *testing.T) {
 		t.Fatal(err)
 	}

-	_, err = xl.HealObject(context.Background(), bucket, object, false, false)
+	_, err = xl.HealObject(context.Background(), bucket, object, false, false, madmin.HealDeepScan)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -19,6 +19,7 @@ package main
 import (
 	"bufio"
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"log"
@@ -45,23 +46,23 @@ func getStartTime() time.Time {
 	di, err := os.Stat("/proc/1")
 	if err != nil {
 		// Cant stat proc dir successfully, exit with error
-		log.Fatal(err.Error())
+		log.Fatalln(err)
 	}
 	return di.ModTime()
 }

 // Returns the ip:port of the Minio process
 // running in the container
-func findEndpoint() string {
+func findEndpoint() (string, error) {
 	cmd := exec.Command("netstat", "-ntlp")
 	stdout, err := cmd.StdoutPipe()
 	if err != nil {
 		// error getting stdout pipe
-		log.Fatal(err.Error())
+		return "", err
 	}
 	if err = cmd.Start(); err != nil {
-		// error starting the command
-		log.Fatal(err.Error())
+		// error executing the command.
+		return "", err
 	}
 	// split netstat output in rows
 	scanner := bufio.NewScanner(stdout)
@@ -85,20 +86,21 @@ func findEndpoint() string {
 			}
 			// wait for cmd to complete before return
 			if err = cmd.Wait(); err != nil {
-				// command failed to run
-				log.Fatal(err.Error())
+				return "", err
 			}
 			// return joint address and port
-			return strings.Join([]string{addr, port}, ":")
+			return strings.Join([]string{addr, port}, ":"), nil
 		}
 	}
+	if err = scanner.Err(); err != nil {
+		return "", err
+	}
 	if err = cmd.Wait(); err != nil {
 		// command failed to run
-		log.Fatal(err.Error())
+		return "", err
 	}
 	// minio process not found, exit with error
-	os.Exit(1)
-	return ""
+	return "", errors.New("no minio process found")
 }

 func main() {
@@ -110,16 +112,16 @@ func main() {

 	//  Refer: https://github.com/moby/moby/pull/28938#issuecomment-301753272

-	if (time.Now().Sub(startTime) / time.Second) < initGraceTime {
-		os.Exit(0)
-	} else {
-		endPoint := findEndpoint()
+	if (time.Now().Sub(startTime) / time.Second) > initGraceTime {
+		endPoint, err := findEndpoint()
+		if err != nil {
+			log.Fatalln(err)
+		}
 		u, err := url.Parse(fmt.Sprintf("http://%s%s", endPoint, healthPath))
 		if err != nil {
 			// Could not parse URL successfully
-			log.Fatal(err.Error())
+			log.Fatalln(err)
 		}
-
 		// Minio server may be using self-signed or CA certificates. To avoid
 		// making Docker setup complicated, we skip verifying certificates here.
 		// This is because, following request tests for health status within
@@ -132,7 +134,7 @@ func main() {
 		resp, err := client.Get(u.String())
 		if err != nil {
 			// GET failed exit
-			log.Fatal(err.Error())
+			log.Fatalln(err)
 		}
 		if resp.StatusCode == http.StatusOK {
 			// Drain any response.
@@ -145,7 +147,7 @@ func main() {
 			// Drain any response.
 			xhttp.DrainBody(resp.Body)
 			// GET failed exit
-			log.Fatal(err.Error())
+			log.Fatalln(err)
 		}
 		bodyString := string(bodyBytes)
 		// Drain any response.
@@ -157,7 +159,7 @@ func main() {
 			resp, err = client.Get(u.String())
 			if err != nil {
 				// GET failed exit
-				log.Fatal(err.Error())
+				log.Fatalln(err)
 			}
 			if resp.StatusCode == http.StatusOK {
 				// Drain any response.
@@ -168,8 +170,9 @@ func main() {
 			// Drain any response.
 			xhttp.DrainBody(resp.Body)
 		}
+		// Execution reaching here means none of
+		// the success cases were satisfied
+		os.Exit(1)
 	}
-	// Execution reaching here means none of
-	// the success cases were satisfied
-	os.Exit(1)
+	os.Exit(0)
 }
@@ -5,7 +5,7 @@ version: '2'
 # 9001 through 9004.
 services:
 minio1:
-  image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+  image: minio/minio:RELEASE.2019-03-20T22-38-47Z
  volumes:
   - data1:/data
  ports:
@@ -15,7 +15,7 @@ services:
   MINIO_SECRET_KEY: minio123
  command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data 
 minio2:
-  image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+  image: minio/minio:RELEASE.2019-03-20T22-38-47Z
  volumes:
   - data2:/data
  ports:
@@ -25,7 +25,7 @@ services:
   MINIO_SECRET_KEY: minio123
  command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data 
 minio3:
-  image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+  image: minio/minio:RELEASE.2019-03-20T22-38-47Z
  volumes:
   - data3:/data
  ports:
@@ -35,7 +35,7 @@ services:
   MINIO_SECRET_KEY: minio123
  command: server http://minio1/data http://minio2/data http://minio3/data http://minio4/data 
 minio4:
-  image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+  image: minio/minio:RELEASE.2019-03-20T22-38-47Z
  volumes:
   - data4:/data
  ports:
@@ -2,7 +2,7 @@ version: '3.1'

 services:
  minio1:
-    image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+    image: minio/minio:RELEASE.2019-03-20T22-38-47Z
    hostname: minio1
    volumes:
      - minio1-data:/export
@@ -24,7 +24,7 @@ services:
      - access_key

  minio2:
-    image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+    image: minio/minio:RELEASE.2019-03-20T22-38-47Z
    hostname: minio2
    volumes:
      - minio2-data:/export
@@ -46,7 +46,7 @@ services:
      - access_key

  minio3:
-    image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+    image: minio/minio:RELEASE.2019-03-20T22-38-47Z
    hostname: minio3
    volumes:
      - minio3-data:/export
@@ -68,7 +68,7 @@ services:
      - access_key

  minio4:
-    image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+    image: minio/minio:RELEASE.2019-03-20T22-38-47Z
    hostname: minio4
    volumes:
      - minio4-data:/export
@@ -2,7 +2,7 @@ version: '3'

 services:
  minio1:
-    image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+    image: minio/minio:RELEASE.2019-03-20T22-38-47Z
    hostname: minio1
    volumes:
      - minio1-data:/export
@@ -24,7 +24,7 @@ services:
    command: server http://minio1/export http://minio2/export http://minio3/export http://minio4/export

  minio2:
-    image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+    image: minio/minio:RELEASE.2019-03-20T22-38-47Z
    hostname: minio2
    volumes:
      - minio2-data:/export
@@ -46,7 +46,7 @@ services:
    command: server http://minio1/export http://minio2/export http://minio3/export http://minio4/export

  minio3:
-    image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+    image: minio/minio:RELEASE.2019-03-20T22-38-47Z
    hostname: minio3
    volumes:
      - minio3-data:/export
@@ -68,7 +68,7 @@ services:
    command: server http://minio1/export http://minio2/export http://minio3/export http://minio4/export

  minio4:
-    image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+    image: minio/minio:RELEASE.2019-03-20T22-38-47Z
    hostname: minio4
    volumes:
      - minio4-data:/export
@@ -197,7 +197,7 @@ kubectl delete statefulset minio \

 If your cluster does not have a storage solution or PV abstraction, you must explicitly define what nodes you wish to run Minio on, and define a homogeneous path to a local fast block device available on every host.

-This must be changed in the example daemonset: [minio-distributed-daemonset.yaml](minio-distributed-daemonset.yaml)
+This must be changed in the example daemonset: [minio-distributed-daemonset.yaml](https://github.com/minio/minio/blob/master/docs/orchestration/kubernetes/minio-distributed-daemonset.yaml)

 Specifically the hostpath:
 ```yaml
@@ -30,7 +30,7 @@ spec:
          value: "minio"
        - name: MINIO_SECRET_KEY
          value: "minio123"
-        image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+        image: minio/minio:RELEASE.2019-03-20T22-38-47Z
        # Unfortunately you must manually define each server. Perhaps autodiscovery via DNS can be implemented in the future.
        args:
        - server
@@ -21,7 +21,7 @@ spec:
          value: "minio"
        - name: MINIO_SECRET_KEY
          value: "minio123"
-        image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+        image: minio/minio:RELEASE.2019-03-20T22-38-47Z
        args:
        - server
        - http://minio-0.minio.default.svc.cluster.local/data
@@ -21,7 +21,7 @@ spec:
      containers:
      - name: minio
        # Pulls the default Minio image from Docker Hub
-        image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+        image: minio/minio:RELEASE.2019-03-20T22-38-47Z
        args:
        - gateway
        - gcs
@@ -29,7 +29,7 @@ spec:
        - name: data 
          mountPath: "/data"
        # Pulls the lastest Minio image from Docker Hub
-        image: minio/minio:RELEASE.2019-02-26T19-51-46Z
+        image: minio/minio:RELEASE.2019-03-20T22-38-47Z
        args:
        - server
        - /data
@@ -0,0 +1,192 @@
+module github.com/minio/minio
+
+require (
+	cloud.google.com/go v0.26.0
+	contrib.go.opencensus.io/exporter/ocagent v0.4.7 // indirect
+	contrib.go.opencensus.io/exporter/stackdriver v0.0.0-20180919222851-d1e19f5c23e9 // indirect
+	github.com/Azure/azure-sdk-for-go v26.4.0+incompatible
+	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
+	github.com/Azure/go-autorest v11.5.2+incompatible
+	github.com/Microsoft/go-winio v0.4.12 // indirect
+	github.com/NYTimes/gziphandler v1.1.1 // indirect
+	github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 // indirect
+	github.com/SAP/go-hdb v0.14.0 // indirect
+	github.com/SermoDigital/jose v0.9.1 // indirect
+	github.com/Shopify/toxiproxy v2.1.4+incompatible // indirect
+	github.com/alecthomas/participle v0.0.0-20190103085315-bf8340a459bd
+	github.com/aliyun/alibaba-cloud-sdk-go v0.0.0-20190315122603-6f9e54af456e // indirect
+	github.com/aliyun/aliyun-oss-go-sdk v0.0.0-20170925032315-6fe16293d6b7
+	github.com/araddon/gou v0.0.0-20190110011759-c797efecbb61 // indirect
+	github.com/asaskevich/govalidator v0.0.0-20180720115003-f9ffefc3facf // indirect
+	github.com/baiyubin/aliyun-sts-go-sdk v0.0.0-20180326062324-cfa1a18b161f // indirect
+	github.com/bcicen/jstream v0.0.0-20190220045926-16c1f8af81c2
+	github.com/bitly/go-hostpool v0.0.0-20171023180738-a3a6125de932 // indirect
+	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
+	github.com/boombuler/barcode v1.0.0 // indirect
+	github.com/briankassouf/jose v0.9.1 // indirect
+	github.com/cenkalti/backoff v2.1.1+incompatible // indirect
+	github.com/centrify/cloud-golang-sdk v0.0.0-20190214225812-119110094d0f // indirect
+	github.com/cheggaaa/pb v0.0.0-20160713104425-73ae1d68fe0b
+	github.com/chrismalek/oktasdk-go v0.0.0-20181212195951-3430665dfaa0 // indirect
+	github.com/containerd/continuity v0.0.0-20181203112020-004b46473808 // indirect
+	github.com/coredns/coredns v0.0.0-20180121192821-d4bf076ccf4e
+	github.com/coreos/etcd v0.0.0-20180703215944-e4425ee79f2f
+	github.com/coreos/go-oidc v2.0.0+incompatible // indirect
+	github.com/dancannon/gorethink v4.0.0+incompatible // indirect
+	github.com/denisenkom/go-mssqldb v0.0.0-20190315220205-a8ed825ac853 // indirect
+	github.com/dgrijalva/jwt-go v0.0.0-20180921172315-3af4c746e1c2
+	github.com/dimchansky/utfbom v1.1.0 // indirect
+	github.com/djherbis/atime v0.0.0-20170215084934-89517e96e10b
+	github.com/dnaeon/go-vcr v1.0.1 // indirect
+	github.com/docker/go-connections v0.4.0 // indirect
+	github.com/docker/go-units v0.3.3 // indirect
+	github.com/duosecurity/duo_api_golang v0.0.0-20190308151101-6c680f768e74 // indirect
+	github.com/dustin/go-humanize v0.0.0-20170228161531-259d2a102b87
+	github.com/eapache/go-resiliency v0.0.0-20160104191539-b86b1ec0dd42 // indirect
+	github.com/eapache/go-xerial-snappy v0.0.0-20160609142408-bb955e01b934 // indirect
+	github.com/eapache/queue v1.1.0 // indirect
+	github.com/eclipse/paho.mqtt.golang v0.0.0-20181129145454-379fd9f99ba5
+	github.com/elazarl/go-bindata-assetfs v0.0.0-20151224045452-57eb5e1fc594
+	github.com/fatih/color v1.7.0
+	github.com/fatih/structs v1.1.0
+	github.com/fullsailor/pkcs7 v0.0.0-20180613152042-8306686428a5 // indirect
+	github.com/gammazero/deque v0.0.0-20190130191400-2afb3858e9c7 // indirect
+	github.com/gammazero/workerpool v0.0.0-20181230203049-86a96b5d5d92 // indirect
+	github.com/garyburd/redigo v1.6.0 // indirect
+	github.com/go-errors/errors v1.0.1 // indirect
+	github.com/go-ldap/ldap v3.0.2+incompatible // indirect
+	github.com/go-sql-driver/mysql v0.0.0-20181218123637-c45f530f8e7f
+	github.com/go-stomp/stomp v2.0.2+incompatible // indirect
+	github.com/go-test/deep v1.0.1 // indirect
+	github.com/gocql/gocql v0.0.0-20190301043612-f6df8288f9b4 // indirect
+	github.com/gogo/protobuf v1.2.1 // indirect
+	github.com/golang/snappy v0.0.1
+	github.com/gomodule/redigo v0.0.0-20190205135352-43fe51054af5
+	github.com/google/go-github v17.0.0+incompatible // indirect
+	github.com/google/go-querystring v1.0.0 // indirect
+	github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf // indirect
+	github.com/google/martian v2.1.0+incompatible // indirect
+	github.com/gopherjs/gopherjs v0.0.0-20190309154008-847fc94819f9 // indirect
+	github.com/gorhill/cronexpr v0.0.0-20180427100037-88b0669f7d75 // indirect
+	github.com/gorilla/context v0.0.0-20160525203319-aed02d124ae4 // indirect
+	github.com/gorilla/handlers v0.0.0-20160410185317-66e6c6f01d8d
+	github.com/gorilla/mux v0.0.0-20160605233521-9fa818a44c2b
+	github.com/gorilla/rpc v0.0.0-20160517062331-bd3317b8f670
+	github.com/gotestyourself/gotestyourself v2.2.0+incompatible // indirect
+	github.com/hashicorp/consul v1.4.3 // indirect
+	github.com/hashicorp/go-cleanhttp v0.0.0-20171218145408-d5fe4b57a186 // indirect
+	github.com/hashicorp/go-gcp-common v0.0.0-20180425173946-763e39302965 // indirect
+	github.com/hashicorp/go-hclog v0.8.0 // indirect
+	github.com/hashicorp/go-memdb v0.0.0-20190306140544-eea0b16292ad // indirect
+	github.com/hashicorp/go-plugin v0.0.0-20190220160451-3f118e8ee104 // indirect
+	github.com/hashicorp/go-retryablehttp v0.0.0-20180718195005-e651d75abec6 // indirect
+	github.com/hashicorp/go-rootcerts v0.0.0-20160503143440-6bb64b370b90 // indirect
+	github.com/hashicorp/go-sockaddr v1.0.2 // indirect
+	github.com/hashicorp/go-version v0.0.0-20160214002439-2e7f5ea8e27b
+	github.com/hashicorp/golang-lru v0.5.1 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/hashicorp/nomad v0.8.7 // indirect
+	github.com/hashicorp/raft v1.0.0 // indirect
+	github.com/hashicorp/serf v0.8.2 // indirect
+	github.com/hashicorp/vault v0.0.0-20181121181053-d4367e581fe1
+	github.com/hashicorp/vault-plugin-auth-alicloud v0.0.0-20190311155555-98628998247d // indirect
+	github.com/hashicorp/vault-plugin-auth-azure v0.0.0-20190201222632-0af1d040b5b3 // indirect
+	github.com/hashicorp/vault-plugin-auth-centrify v0.0.0-20180816201131-66b0a34a58bf // indirect
+	github.com/hashicorp/vault-plugin-auth-gcp v0.0.0-20190201215414-7d4c2101e7d0 // indirect
+	github.com/hashicorp/vault-plugin-auth-jwt v0.0.0-20190314211503-86b44673ce1e // indirect
+	github.com/hashicorp/vault-plugin-auth-kubernetes v0.0.0-20190201222209-db96aa4ab438 // indirect
+	github.com/hashicorp/vault-plugin-secrets-ad v0.0.0-20190131222416-4796d9980125 // indirect
+	github.com/hashicorp/vault-plugin-secrets-alicloud v0.0.0-20190131211812-b0abe36195cb // indirect
+	github.com/hashicorp/vault-plugin-secrets-azure v0.0.0-20181207232500-0087bdef705a // indirect
+	github.com/hashicorp/vault-plugin-secrets-gcp v0.0.0-20190311200649-621231cb86fe // indirect
+	github.com/hashicorp/vault-plugin-secrets-gcpkms v0.0.0-20190116164938-d6b25b0b4a39 // indirect
+	github.com/hashicorp/vault-plugin-secrets-kv v0.0.0-20190315192709-dccffee64925 // indirect
+	github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf
+	github.com/jeffchao/backoff v0.0.0-20140404060208-9d7fd7aa17f2 // indirect
+	github.com/jefferai/jsonx v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.6 // indirect
+	github.com/keybase/go-crypto v0.0.0-20190312101036-b475f2ecc1fe // indirect
+	github.com/klauspost/compress v1.3.0 // indirect
+	github.com/klauspost/cpuid v0.0.0-20160106104451-349c67577817 // indirect
+	github.com/klauspost/crc32 v0.0.0-20161016154125-cb6bfca970f6 // indirect
+	github.com/klauspost/pgzip v0.0.0-20180606150939-90b2c57fba35
+	github.com/klauspost/reedsolomon v0.0.0-20190210214925-2b210cf0866d
+	github.com/lib/pq v0.0.0-20181016162627-9eb73efc1fcc
+	github.com/marstr/guid v1.1.0 // indirect
+	github.com/mattbaird/elastigo v0.0.0-20170123220020-2fe47fd29e4b // indirect
+	github.com/mattn/go-isatty v0.0.4
+	github.com/michaelklishin/rabbit-hole v1.5.0 // indirect
+	github.com/miekg/dns v1.0.14
+	github.com/minio/blazer v0.0.0-20171126203752-2081f5bf0465
+	github.com/minio/cli v0.0.0-20170227073228-b8ae5507c0ce
+	github.com/minio/dsync v0.0.0-20190104003057-61c41ffdeea2
+	github.com/minio/highwayhash v0.0.0-20181220011308-93ed73d64169
+	github.com/minio/lsync v0.0.0-20190207022115-a4e43e3d0887
+	github.com/minio/mc v0.0.0-20190311071728-2e612b23d665
+	github.com/minio/minio-go v0.0.0-20190227180923-59af836a7e6d
+	github.com/minio/parquet-go v0.0.0-20190318185229-9d767baf1679
+	github.com/minio/sha256-simd v0.0.0-20190131020904-2d45a736cd16
+	github.com/minio/sio v0.0.0-20180327104954-6a41828a60f0
+	github.com/mitchellh/copystructure v1.0.0 // indirect
+	github.com/mitchellh/go-homedir v1.1.0
+	github.com/mitchellh/go-testing-interface v1.0.0 // indirect
+	github.com/mitchellh/hashstructure v1.0.0 // indirect
+	github.com/mitchellh/pointerstructure v0.0.0-20170205204203-f2329fcfa9e2 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.1 // indirect
+	github.com/nats-io/gnatsd v1.4.1 // indirect
+	github.com/nats-io/go-nats v0.0.0-20161120202126-6b6bf392d34d // indirect
+	github.com/nats-io/go-nats-streaming v0.0.0-20161216191029-077898146bfb
+	github.com/nats-io/nats v0.0.0-20160916181735-70b70be17b77
+	github.com/nats-io/nats-streaming-server v0.12.2 // indirect
+	github.com/nats-io/nuid v1.0.0 // indirect
+	github.com/nsqio/go-nsq v0.0.0-20181028195256-0527e80f3ba5
+	github.com/onsi/ginkgo v1.8.0 // indirect
+	github.com/onsi/gomega v1.5.0 // indirect
+	github.com/opencontainers/go-digest v1.0.0-rc1 // indirect
+	github.com/opencontainers/image-spec v1.0.1 // indirect
+	github.com/opencontainers/runc v0.1.1 // indirect
+	github.com/ory-am/common v0.4.0 // indirect
+	github.com/ory/dockertest v3.3.4+incompatible // indirect
+	github.com/patrickmn/go-cache v2.1.0+incompatible // indirect
+	github.com/pborman/uuid v1.2.0 // indirect
+	github.com/pkg/profile v1.2.1
+	github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
+	github.com/pquerna/otp v1.1.0 // indirect
+	github.com/prometheus/client_golang v0.9.2
+	github.com/rjeczalik/notify v0.9.2
+	github.com/rs/cors v0.0.0-20190116175910-76f58f330d76
+	github.com/ryanuber/go-glob v1.0.0 // indirect
+	github.com/samuel/go-zookeeper v0.0.0-20180130194729-c4fab1ac1bec // indirect
+	github.com/satori/go.uuid v1.2.0 // indirect
+	github.com/segmentio/go-prompt v0.0.0-20161017233205-f0d19b6901ad
+	github.com/skyrings/skyring-common v0.0.0-20160324141443-762fd2bfc12e
+	github.com/smartystreets/goconvey v0.0.0-20190306220146-200a235640ff // indirect
+	github.com/streadway/amqp v0.0.0-20160311215503-2e25825abdbd
+	github.com/tidwall/gjson v1.1.4
+	github.com/tidwall/sjson v1.0.4
+	github.com/valyala/tcplisten v0.0.0-20161114210144-ceec8f93295a
+	go.uber.org/atomic v1.3.2
+	golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a
+	golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3 // indirect
+	golang.org/x/net v0.0.0-20190318221613-d196dffd7c2b
+	golang.org/x/sys v0.0.0-20190318195719-6c81ef8f67ca
+	golang.org/x/time v0.0.0-20181108054448-85acf8d2951c
+	golang.org/x/tools v0.0.0-20190318200714-bb1270c20edf // indirect
+	google.golang.org/api v0.0.0-20180916000451-19ff8768a5c0
+	google.golang.org/genproto v0.0.0-20180918203901-c3f76f3b92d1 // indirect
+	gopkg.in/Shopify/sarama.v1 v1.10.1
+	gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d // indirect
+	gopkg.in/gorethink/gorethink.v4 v4.1.0 // indirect
+	gopkg.in/mgo.v2 v2.0.0-20180705113604-9856a29383ce // indirect
+	gopkg.in/olivere/elastic.v5 v5.0.31
+	gopkg.in/ory-am/dockertest.v2 v2.2.3 // indirect
+	gopkg.in/square/go-jose.v2 v2.3.0 // indirect
+	gopkg.in/yaml.v2 v2.2.2
+	gotest.tools v2.2.0+incompatible // indirect
+	k8s.io/api v0.0.0-20190313115550-3c12c96769cc // indirect
+	k8s.io/apimachinery v0.0.0-20190313115320-c9defaaddf6f // indirect
+	k8s.io/klog v0.2.0 // indirect
+	layeh.com/radius v0.0.0-20190118135028-0f678f039617 // indirect
+	sigs.k8s.io/yaml v1.1.0 // indirect
+)
@@ -0,0 +1,673 @@
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@@ -35,6 +35,8 @@ import (
 // ErrNoEntriesFound - Indicates no entries were found for the given key (directory)
 var ErrNoEntriesFound = errors.New("No entries found for this key")

+const etcdPathSeparator = "/"
+
 // create a new coredns service record for the bucket.
 func newCoreDNSMsg(bucket, ip string, port int, ttl uint32) ([]byte, error) {
 	return json.Marshal(&SrvRecord{
@@ -73,6 +75,15 @@ func (c *coreDNS) Get(bucket string) ([]SrvRecord, error) {
 	return srvRecords, nil
 }

+// msgUnPath converts a etcd path to domainname.
+func msgUnPath(s string) string {
+	ks := strings.Split(strings.Trim(s, etcdPathSeparator), etcdPathSeparator)
+	for i, j := 0, len(ks)-1; i < j; i, j = i+1, j-1 {
+		ks[i], ks[j] = ks[j], ks[i]
+	}
+	return strings.Join(ks, ".")
+}
+
 // Retrieves list of entries under the key passed.
 // Note that this method fetches entries upto only two levels deep.
 func (c *coreDNS) list(key string) ([]SrvRecord, error) {
@@ -83,7 +94,7 @@ func (c *coreDNS) list(key string) ([]SrvRecord, error) {
 		return nil, err
 	}
 	if r.Count == 0 {
-		key = strings.TrimSuffix(key, "/")
+		key = strings.TrimSuffix(key, etcdPathSeparator)
 		r, err = c.etcdClient.Get(ctx, key)
 		if err != nil {
 			return nil, err
@@ -101,23 +112,18 @@ func (c *coreDNS) list(key string) ([]SrvRecord, error) {
 		}
 		srvRecord.Key = strings.TrimPrefix(string(n.Key), key)
 		srvRecord.Key = strings.TrimSuffix(srvRecord.Key, srvRecord.Host)
-		// SRV records are stored in the following form
-		// /skydns/net/miniocloud/bucket1, so this function serves multiple
-		// purposes basically when we do a Get(bucketName) this function
-		// should return a single DNS record for any input 'bucketName'.
-		//
-		// In all other situations when we want to list all DNS records,
-		// which is handled in the else clause.
-		for _, domainName := range c.domainNames {
-			if key != msg.Path(fmt.Sprintf(".%s.", domainName), defaultPrefixPath) {
-				if srvRecord.Key == "/" {
-					srvRecords = append(srvRecords, srvRecord)
-				}
-			} else {
-				srvRecords = append(srvRecords, srvRecord)
-			}
+
+		// Skip non-bucket entry like for a key
+		// /skydns/net/miniocloud/10.0.0.1 that may exist as
+		// dns entry for the server (rather than the bucket
+		// itself).
+		if srvRecord.Key == "" {
+			continue
 		}

+		srvRecord.Key = msgUnPath(srvRecord.Key)
+		srvRecords = append(srvRecords, srvRecord)
+
 	}
 	if len(srvRecords) == 0 {
 		return nil, ErrNoEntriesFound
@@ -137,7 +143,7 @@ func (c *coreDNS) Put(bucket string) error {
 		}
 		for _, domainName := range c.domainNames {
 			key := msg.Path(fmt.Sprintf("%s.%s", bucket, domainName), defaultPrefixPath)
-			key = key + "/" + ip
+			key = key + etcdPathSeparator + ip
 			ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
 			_, err = c.etcdClient.Put(ctx, key, string(bucketMsg))
 			defer cancel()
@@ -162,7 +168,7 @@ func (c *coreDNS) Delete(bucket string) error {
 		}
 		for _, record := range srvRecords {
 			dctx, dcancel := context.WithTimeout(context.Background(), defaultContextTimeout)
-			if _, err = c.etcdClient.Delete(dctx, key+"/"+record.Host); err != nil {
+			if _, err = c.etcdClient.Delete(dctx, key+etcdPathSeparator+record.Host); err != nil {
 				dcancel()
 				return err
 			}
@@ -1,78 +0,0 @@
-// +build ignore
-
-package main
-
-/*
- * Minio Cloud Storage, (C) 2017 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-import (
-	"fmt"
-	"log"
-
-	"github.com/minio/minio/pkg/madmin"
-)
-
-func main() {
-
-	// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY are
-	// dummy values, please replace them with original values.
-
-	// API requests are secure (HTTPS) if secure=true and insecure (HTTPS) otherwise.
-	// New returns an Minio Admin client object.
-	madmClnt, err := madmin.New("your-minio.example.com:9000", "YOUR-ACCESSKEYID", "YOUR-SECRETACCESSKEY", true)
-	if err != nil {
-		log.Fatalln(err)
-	}
-
-	bucket := "mybucket"
-	prefix := "myprefix"
-
-	// Create a done channel to control 'ListObjectsHeal' go routine.
-	doneCh := make(chan struct{})
-	// Indicate to our routine to exit cleanly upon return.
-	defer close(doneCh)
-
-	// Set true if recursive listing is needed.
-	isRecursive := true
-	// List objects that need healing for a given bucket and
-	// prefix.
-	healObjectsCh, err := madmClnt.ListObjectsHeal(bucket, prefix, isRecursive, doneCh)
-	if err != nil {
-		log.Fatalln(err)
-	}
-
-	for object := range healObjectsCh {
-		if object.Err != nil {
-			log.Fatalln(err)
-			return
-		}
-
-		if object.HealObjectInfo != nil {
-			switch healInfo := *object.HealObjectInfo; healInfo.Status {
-			case madmin.CanHeal:
-				fmt.Println(object.Key, " can be healed.")
-			case madmin.CanPartiallyHeal:
-				fmt.Println(object.Key, " can't be healed completely, some disks are offline.")
-			case madmin.QuorumUnavailable:
-				fmt.Println(object.Key, " can't be healed until quorum is available.")
-			case madmin.Corrupted:
-				fmt.Println(object.Key, " can't be healed, not enough information.")
-			}
-		}
-		fmt.Println("object: ", object)
-	}
-}
@@ -26,11 +26,22 @@ import (
 	"time"
 )

+// HealScanMode represents the type of healing scan
+type HealScanMode int
+
+const (
+	// HealNormalScan checks if parts are present and not outdated
+	HealNormalScan HealScanMode = iota
+	// HealDeepScan checks for parts bitrot checksums
+	HealDeepScan
+)
+
 // HealOpts - collection of options for a heal sequence
 type HealOpts struct {
-	Recursive bool `json:"recursive"`
-	DryRun    bool `json:"dryRun"`
-	Remove    bool `json:"remove"`
+	Recursive bool         `json:"recursive"`
+	DryRun    bool         `json:"dryRun"`
+	Remove    bool         `json:"remove"`
+	ScanMode  HealScanMode `json:"scanMode"`
 }

 // HealStartSuccess - holds information about a successfully started
@@ -72,11 +72,12 @@ type StorageInfo struct {
 // ServerProperties holds some of the server's information such as uptime,
 // version, region, ..
 type ServerProperties struct {
-	Uptime   time.Duration `json:"uptime"`
-	Version  string        `json:"version"`
-	CommitID string        `json:"commitID"`
-	Region   string        `json:"region"`
-	SQSARN   []string      `json:"sqsARN"`
+	Uptime       time.Duration `json:"uptime"`
+	Version      string        `json:"version"`
+	CommitID     string        `json:"commitID"`
+	DeploymentID string        `json:"deploymentID"`
+	Region       string        `json:"region"`
+	SQSARN       []string      `json:"sqsARN"`
 }

 // ServerConnStats holds network information
@@ -19,10 +19,12 @@ package csv
 import (
 	"bytes"
 	"encoding/csv"
+	"encoding/json"
+	"errors"
 	"fmt"

+	"github.com/bcicen/jstream"
 	"github.com/minio/minio/pkg/s3select/sql"
-	"github.com/tidwall/sjson"
 )

 // Record - is CSV record.
@@ -78,20 +80,21 @@ func (r *Record) MarshalCSV(fieldDelimiter rune) ([]byte, error) {

 // MarshalJSON - encodes to JSON data.
 func (r *Record) MarshalJSON() ([]byte, error) {
-	data := "{}"
-
-	var err error
-	for i := len(r.columnNames) - 1; i >= 0; i-- {
-		if i >= len(r.csvRecord) {
-			continue
-		}
-
-		if data, err = sjson.Set(data, r.columnNames[i], r.csvRecord[i]); err != nil {
-			return nil, err
-		}
+	var kvs jstream.KVS = make([]jstream.KV, len(r.columnNames))
+	for i := 0; i < len(r.columnNames); i++ {
+		kvs[i] = jstream.KV{Key: r.columnNames[i], Value: r.csvRecord[i]}
 	}
+	return json.Marshal(kvs)
+}

-	return []byte(data), nil
+// Raw - returns the underlying data with format info.
+func (r *Record) Raw() (sql.SelectObjectFormat, interface{}) {
+	return sql.SelectFmtCSV, r
+}
+
+// Replace - is not supported for CSV
+func (r *Record) Replace(_ jstream.KVS) error {
+	return errors.New("Replace is not supported for CSV")
 }

 // NewRecord - creates new CSV record.
@@ -17,13 +17,11 @@
 package json

 import (
-	"encoding/json"
 	"io"

 	"github.com/minio/minio/pkg/s3select/sql"

 	"github.com/bcicen/jstream"
-	"github.com/tidwall/sjson"
 )

 // Reader - JSON record reader for S3Select.
@@ -44,23 +42,22 @@ func (r *Reader) Read() (sql.Record, error) {
 		return nil, io.EOF
 	}

-	var data []byte
-	var err error
-
+	var kvs jstream.KVS
 	if v.ValueType == jstream.Object {
-		data, err = json.Marshal(v.Value)
+		// This is a JSON object type (that preserves key
+		// order)
+		kvs = v.Value.(jstream.KVS)
 	} else {
-		// To be AWS S3 compatible
-		// Select for JSON needs to output non-object JSON as single column value
-		// i.e. a map with `_1` as key and value as the non-object.
-		data, err = sjson.SetBytes(data, "_1", v.Value)
-	}
-	if err != nil {
-		return nil, errJSONParsingError(err)
+		// To be AWS S3 compatible Select for JSON needs to
+		// output non-object JSON as single column value
+		// i.e. a map with `_1` as key and value as the
+		// non-object.
+		kvs = jstream.KVS{jstream.KV{Key: "_1", Value: v.Value}}
 	}

 	return &Record{
-		data: data,
+		KVS:          kvs,
+		SelectFormat: sql.SelectFmtJSON,
 	}, nil
 }

@@ -19,40 +19,40 @@ package json
 import (
 	"bytes"
 	"encoding/csv"
+	"encoding/json"
+	"errors"
 	"fmt"
 	"strings"

+	"github.com/bcicen/jstream"
 	"github.com/minio/minio/pkg/s3select/sql"
-	"github.com/tidwall/gjson"
-	"github.com/tidwall/sjson"
 )

+// RawJSON is a byte-slice that contains valid JSON
+type RawJSON []byte
+
+// MarshalJSON instance for []byte that assumes that byte-slice is
+// already serialized JSON
+func (b RawJSON) MarshalJSON() ([]byte, error) {
+	return b, nil
+}
+
 // Record - is JSON record.
 type Record struct {
-	data []byte
+	// Used in Set(), Marshal*()
+	KVS jstream.KVS
+
+	SelectFormat sql.SelectObjectFormat
 }

 // Get - gets the value for a column name.
 func (r *Record) Get(name string) (*sql.Value, error) {
-	result := gjson.GetBytes(r.data, name)
-	switch result.Type {
-	case gjson.Null:
-		return sql.FromNull(), nil
-	case gjson.False:
-		return sql.FromBool(false), nil
-	case gjson.Number:
-		return sql.FromFloat(result.Float()), nil
-	case gjson.String:
-		return sql.FromString(result.String()), nil
-	case gjson.True:
-		return sql.FromBool(true), nil
-	}
-
-	return nil, fmt.Errorf("unsupported gjson value %v; %v", result, result.Type)
+	// Get is implemented directly in the sql package.
+	return nil, errors.New("not implemented here")
 }

 // Set - sets the value for a column name.
-func (r *Record) Set(name string, value *sql.Value) (err error) {
+func (r *Record) Set(name string, value *sql.Value) error {
 	var v interface{}
 	if b, ok := value.ToBool(); ok {
 		v = b
@@ -67,24 +67,33 @@ func (r *Record) Set(name string, value *sql.Value) (err error) {
 	} else if value.IsNull() {
 		v = nil
 	} else if b, ok := value.ToBytes(); ok {
-		v = string(b)
+		v = RawJSON(b)
 	} else {
 		return fmt.Errorf("unsupported sql value %v and type %v", value, value.GetTypeString())
 	}

 	name = strings.Replace(name, "*", "__ALL__", -1)
-	r.data, err = sjson.SetBytes(r.data, name, v)
-	return err
+	r.KVS = append(r.KVS, jstream.KV{Key: name, Value: v})
+	return nil
 }

 // MarshalCSV - encodes to CSV data.
 func (r *Record) MarshalCSV(fieldDelimiter rune) ([]byte, error) {
 	var csvRecord []string
-	result := gjson.ParseBytes(r.data)
-	result.ForEach(func(key, value gjson.Result) bool {
-		csvRecord = append(csvRecord, value.String())
-		return true
-	})
+	for _, kv := range r.KVS {
+		var columnValue string
+		switch val := kv.Value.(type) {
+		case bool, float64, int64, string:
+			columnValue = fmt.Sprintf("%v", val)
+		case nil:
+			columnValue = ""
+		case RawJSON:
+			columnValue = string([]byte(val))
+		default:
+			return nil, errors.New("Cannot marshal unhandled type")
+		}
+		csvRecord = append(csvRecord, columnValue)
+	}

 	buf := new(bytes.Buffer)
 	w := csv.NewWriter(buf)
@@ -101,14 +110,26 @@ func (r *Record) MarshalCSV(fieldDelimiter rune) ([]byte, error) {
 	return data[:len(data)-1], nil
 }

+// Raw - returns the underlying representation.
+func (r *Record) Raw() (sql.SelectObjectFormat, interface{}) {
+	return r.SelectFormat, r.KVS
+}
+
 // MarshalJSON - encodes to JSON data.
 func (r *Record) MarshalJSON() ([]byte, error) {
-	return r.data, nil
+	return json.Marshal(r.KVS)
+}
+
+// Replace the underlying buffer of json data.
+func (r *Record) Replace(k jstream.KVS) error {
+	r.KVS = k
+	return nil
 }

 // NewRecord - creates new empty JSON record.
-func NewRecord() *Record {
+func NewRecord(f sql.SelectObjectFormat) *Record {
 	return &Record{
-		data: []byte("{}"),
+		KVS:          jstream.KVS{},
+		SelectFormat: f,
 	}
 }
@@ -19,7 +19,8 @@ package parquet
 import (
 	"io"

-	"github.com/minio/minio/pkg/s3select/json"
+	"github.com/bcicen/jstream"
+	jsonfmt "github.com/minio/minio/pkg/s3select/json"
 	"github.com/minio/minio/pkg/s3select/sql"
 	parquetgo "github.com/minio/parquet-go"
 	parquetgen "github.com/minio/parquet-go/gen-go/parquet"
@@ -27,13 +28,13 @@ import (

 // Reader - Parquet record reader for S3Select.
 type Reader struct {
-	args *ReaderArgs
-	file *parquetgo.File
+	args   *ReaderArgs
+	reader *parquetgo.Reader
 }

 // Read - reads single record.
 func (r *Reader) Read() (rec sql.Record, rerr error) {
-	parquetRecord, err := r.file.Read()
+	parquetRecord, err := r.reader.Read()
 	if err != nil {
 		if err != io.EOF {
 			return nil, errParquetParsingError(err)
@@ -42,52 +43,48 @@ func (r *Reader) Read() (rec sql.Record, rerr error) {
 		return nil, err
 	}

-	record := json.NewRecord()
+	kvs := jstream.KVS{}
 	f := func(name string, v parquetgo.Value) bool {
 		if v.Value == nil {
-			if err := record.Set(name, sql.FromNull()); err != nil {
-				rerr = errParquetParsingError(err)
-			}
-			return rerr == nil
+			kvs = append(kvs, jstream.KV{Key: name, Value: nil})
+			return true
 		}

-		var value *sql.Value
+		var value interface{}
 		switch v.Type {
 		case parquetgen.Type_BOOLEAN:
-			value = sql.FromBool(v.Value.(bool))
+			value = v.Value.(bool)
 		case parquetgen.Type_INT32:
-			value = sql.FromInt(int64(v.Value.(int32)))
+			value = int64(v.Value.(int32))
 		case parquetgen.Type_INT64:
-			value = sql.FromInt(int64(v.Value.(int64)))
+			value = int64(v.Value.(int64))
 		case parquetgen.Type_FLOAT:
-			value = sql.FromFloat(float64(v.Value.(float32)))
+			value = float64(v.Value.(float32))
 		case parquetgen.Type_DOUBLE:
-			value = sql.FromFloat(v.Value.(float64))
+			value = v.Value.(float64)
 		case parquetgen.Type_INT96, parquetgen.Type_BYTE_ARRAY, parquetgen.Type_FIXED_LEN_BYTE_ARRAY:
-			value = sql.FromString(string(v.Value.([]byte)))
+			value = string(v.Value.([]byte))
 		default:
 			rerr = errParquetParsingError(nil)
 			return false
 		}

-		if err = record.Set(name, value); err != nil {
-			rerr = errParquetParsingError(err)
-		}
-		return rerr == nil
+		kvs = append(kvs, jstream.KV{Key: name, Value: value})
+		return true
 	}

 	parquetRecord.Range(f)
-	return record, rerr
+	return &jsonfmt.Record{KVS: kvs, SelectFormat: sql.SelectFmtParquet}, nil
 }

 // Close - closes underlaying readers.
 func (r *Reader) Close() error {
-	return r.file.Close()
+	return r.reader.Close()
 }

 // NewReader - creates new Parquet reader using readerFunc callback.
 func NewReader(getReaderFunc func(offset, length int64) (io.ReadCloser, error), args *ReaderArgs) (*Reader, error) {
-	file, err := parquetgo.Open(getReaderFunc, nil)
+	reader, err := parquetgo.NewReader(getReaderFunc, nil)
 	if err != nil {
 		if err != io.EOF {
 			return nil, errParquetParsingError(err)
@@ -97,7 +94,7 @@ func NewReader(getReaderFunc func(offset, length int64) (io.ReadCloser, error),
 	}

 	return &Reader{
-		args: args,
-		file: file,
+		args:   args,
+		reader: reader,
 	}, nil
 }
@@ -246,7 +246,7 @@ func (s3Select *S3Select) outputRecord() sql.Record {
 	case csvFormat:
 		return csv.NewRecord()
 	case jsonFormat:
-		return json.NewRecord()
+		return json.NewRecord(sql.SelectFmtJSON)
 	}

 	panic(fmt.Errorf("unknown output format '%v'", s3Select.Output.format))
@@ -391,6 +391,10 @@ func (s3Select *S3Select) Evaluate(w http.ResponseWriter) {
 			break
 		}

+		if inputRecord, err = s3Select.statement.EvalFrom(s3Select.Input.format, inputRecord); err != nil {
+			break
+		}
+
 		if s3Select.statement.IsAggregated() {
 			if err = s3Select.statement.AggregateRow(inputRecord); err != nil {
 				break
@@ -16,6 +16,8 @@

 package sql

+import "fmt"
+
 type s3Error struct {
 	code       string
 	message    string
@@ -91,7 +93,16 @@ func errQueryAnalysisFailure(err error) *s3Error {
 func errBadTableName(err error) *s3Error {
 	return &s3Error{
 		code:       "BadTableName",
-		message:    "The table name is not supported",
+		message:    fmt.Sprintf("The table name is not supported: %v", err),
+		statusCode: 400,
+		cause:      err,
+	}
+}
+
+func errDataSource(err error) *s3Error {
+	return &s3Error{
+		code:       "DataSourcePathUnsupported",
+		message:    fmt.Sprintf("Data source: %v", err),
 		statusCode: 400,
 		cause:      err,
 	}
@@ -17,8 +17,11 @@
 package sql

 import (
+	"encoding/json"
 	"errors"
 	"strings"
+
+	"github.com/bcicen/jstream"
 )

 var (
@@ -319,7 +322,44 @@ func (e *JSONPath) evalNode(r Record) (*Value, error) {
 	if len(ps) == 2 {
 		keypath = ps[1]
 	}
-	return r.Get(keypath)
+	objFmt, rawVal := r.Raw()
+	switch objFmt {
+	case SelectFmtJSON, SelectFmtParquet:
+		rowVal := rawVal.(jstream.KVS)
+
+		pathExpr := e.PathExpr
+		if len(pathExpr) == 0 {
+			pathExpr = []*JSONPathElement{{Key: &ObjectKey{ID: e.BaseKey}}}
+		}
+
+		result, err := jsonpathEval(pathExpr, rowVal)
+		if err != nil {
+			return nil, err
+		}
+
+		switch rval := result.(type) {
+		case string:
+			return FromString(rval), nil
+		case float64:
+			return FromFloat(rval), nil
+		case int64:
+			return FromInt(rval), nil
+		case bool:
+			return FromBool(rval), nil
+		case jstream.KVS, []interface{}:
+			bs, err := json.Marshal(result)
+			if err != nil {
+				return nil, err
+			}
+			return FromBytes(bs), nil
+		case nil:
+			return FromNull(), nil
+		default:
+			return nil, errors.New("Unhandled value type")
+		}
+	default:
+		return r.Get(keypath)
+	}
 }

 func (e *PrimaryTerm) evalNode(r Record) (res *Value, err error) {
@@ -549,11 +549,12 @@ func timestampCast(v *Value) (t time.Time, _ error) {

 func boolCast(v *Value) (b bool, _ error) {
 	sToB := func(s string) (bool, error) {
-		if s == "true" {
+		switch s {
+		case "true":
 			return true, nil
-		} else if s == "false" {
+		case "false":
 			return false, nil
-		} else {
+		default:
 			return false, errCastFailure("cannot cast to Bool")
 		}
 	}
@@ -0,0 +1,84 @@
+{
+    "title": "Murder on the Orient Express",
+    "authorInfo": {
+        "name": "Agatha Christie",
+        "yearRange": [1890, 1976],
+        "penName": "Mary Westmacott"
+    },
+    "genre": "Crime novel",
+    "publicationHistory": [
+        {
+            "year": 1934,
+            "publisher": "Collins Crime Club (London)",
+            "type": "Hardcover",
+            "pages": 256
+        },
+        {
+            "year": 1934,
+            "publisher": "Dodd Mead and Company (New York)",
+            "type": "Hardcover",
+            "pages": 302
+        },
+        {
+            "year": 2011,
+            "publisher": "Harper Collins",
+            "type": "Paperback",
+            "pages": 265
+        }
+    ]
+}
+{
+    "title": "The Robots of Dawn",
+    "authorInfo": {
+        "name": "Isaac Asimov",
+        "yearRange": [1920, 1992],
+        "penName": "Paul French"
+    },
+    "genre": "Science fiction",
+    "publicationHistory": [
+        {
+            "year": 1983,
+            "publisher": "Phantasia Press",
+            "type": "Hardcover",
+            "pages": 336
+        },
+        {
+            "year": 1984,
+            "publisher": "Granada",
+            "type": "Hardcover",
+            "pages": 419
+        },
+        {
+            "year": 2018,
+            "publisher": "Harper Voyager",
+            "type": "Paperback",
+            "pages": 432
+        }
+    ]
+}
+{
+    "title": "Pigs Have Wings",
+    "authorInfo": {
+        "name": "P. G. Wodehouse",
+        "yearRange": [1881, 1975]
+    },
+    "genre": "Comic novel",
+    "publicationHistory": [
+        {
+            "year": 1952,
+            "publisher": "Doubleday & Company",
+            "type": "Hardcover"
+        },
+        {
+            "year": 2000,
+            "publisher": "Harry N. Abrams",
+            "type": "Hardcover"
+        },
+        {
+            "year": 2019,
+            "publisher": "Ulverscroft Collections",
+            "type": "Paperback",
+            "pages": 294
+        }
+    ]
+}
@@ -0,0 +1,100 @@
+/*
+ * Minio Cloud Storage, (C) 2019 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sql
+
+import (
+	"errors"
+
+	"github.com/bcicen/jstream"
+)
+
+var (
+	errKeyLookup                 = errors.New("Cannot look up key in non-object value")
+	errIndexLookup               = errors.New("Cannot look up array index in non-array value")
+	errWildcardObjectLookup      = errors.New("Object wildcard used on non-object value")
+	errWildcardArrayLookup       = errors.New("Array wildcard used on non-array value")
+	errWilcardObjectUsageInvalid = errors.New("Invalid usage of object wildcard")
+)
+
+func jsonpathEval(p []*JSONPathElement, v interface{}) (r interface{}, err error) {
+	// fmt.Printf("JPATHexpr: %v jsonobj: %v\n\n", p, v)
+	if len(p) == 0 || v == nil {
+		return v, nil
+	}
+
+	switch {
+	case p[0].Key != nil:
+		key := p[0].Key.keyString()
+
+		kvs, ok := v.(jstream.KVS)
+		if !ok {
+			return nil, errKeyLookup
+		}
+		for _, kv := range kvs {
+			if kv.Key == key {
+				return jsonpathEval(p[1:], kv.Value)
+			}
+		}
+		// Key not found - return nil result
+		return nil, nil
+
+	case p[0].Index != nil:
+		idx := *p[0].Index
+
+		arr, ok := v.([]interface{})
+		if !ok {
+			return nil, errIndexLookup
+		}
+
+		if idx >= len(arr) {
+			return nil, nil
+		}
+		return jsonpathEval(p[1:], arr[idx])
+
+	case p[0].ObjectWildcard:
+		kvs, ok := v.(jstream.KVS)
+		if !ok {
+			return nil, errWildcardObjectLookup
+		}
+
+		if len(p[1:]) > 0 {
+			return nil, errWilcardObjectUsageInvalid
+		}
+
+		return kvs, nil
+
+	case p[0].ArrayWildcard:
+		arr, ok := v.([]interface{})
+		if !ok {
+			return nil, errWildcardArrayLookup
+		}
+
+		// Lookup remainder of path in each array element and
+		// make result array.
+		var result []interface{}
+		for _, a := range arr {
+			rval, err := jsonpathEval(p[1:], a)
+			if err != nil {
+				return nil, err
+			}
+
+			result = append(result, rval)
+		}
+		return result, nil
+	}
+	panic("cannot reach here")
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Harshavardhana	6df05e489d	Set Read/Write timeouts only for net.Conn not http.Server (#7431 ) Fixes #7425	2019-03-27 22:10:06 +05:30
Harshavardhana	4a698c731b	HealObjects should remove objects without quorum (#7407 ) This PR adds a way to list objects without quorum such that they can purged by `mc admin heal --remove`	2019-03-26 14:57:44 -07:00
Harshavardhana	9629de8230	Add proper context based logging when bitrot stream calls fail (#7415 )	2019-03-26 13:59:33 -07:00
Harshavardhana	0250f7de67	Cleanup stale multipart uploads older than 3 days (#7424 ) Fixes #6627	2019-03-25 13:41:05 -07:00
kannappanr	7154b8a568	Error log: Correct error type in anonymous mode (#7414 ) Currently message is set to error type value. Message field is not used in error logs. it is used only in the case of info logs. This PR sets error message field to store error type correctly.	2019-03-25 13:40:08 -07:00
Anis Elleuch	8689ec258b	Don't decrypt ETag in validation when source is SSEC multipart (#7423 ) Copying an encrypted SSEC object when this latter is uploaded using multipart mechanism was failing because ETag in case of encrypted multipart upload is not encrypted. This PR fixes the behavior.	2019-03-25 12:17:31 -07:00
Krishnan Parthasarathi	aac9e2a7dd	Return deploymentID in ServerInfo REST call (#7422 ) Makes deploymentID information uniform in distributed setup	2019-03-25 11:55:28 -07:00
Harshavardhana	719d21efd8	Generate coverage across all sub-dirs (#7416 )	2019-03-25 11:54:14 -07:00
Harshavardhana	e0a87e96de	Populate host value from GetSourceIP directly (#7417 )	2019-03-25 11:45:42 -07:00
Harshavardhana	0a44e70177	Change findEndpoint to return errors for Scanlines (#7390 )	2019-03-25 13:31:02 +05:30
Rushan	22b4fe0a51	Update browser UI with new logo and colors (#7408 )	2019-03-23 09:57:09 -07:00
Praveen raj Mani	89e45d0695	Restart process should use the current process' pid (#7373 ) This fixes varying pids for server-respawns. And avoids duplicate process creating multiple pids when the server restart signal is triggered with service restart enabled. Fixes #7350	2019-03-20 22:20:30 -07:00
poornas	8e1e701d35	Azure:ETag returned by ListObjects to be consistent with GetObjectInfo (#7301 )	2019-03-20 18:11:46 -07:00
kannappanr	87cf51d5ab	unused code: Remove LoadCredentials function (#7369 ) It is required to set the environment variable in the case of distributed minio. LoadCredentials is used to notify peers of the change and will not work if environment variable is set. so, this function will never be called.	2019-03-20 18:09:57 -07:00
Minio Trusted	8af45f0135	Update yaml files to latest version RELEASE.2019-03-20T22-38-47Z	2019-03-20 22:49:06 +00:00
Harshavardhana	a9032b52b8	Change storageRESTTimeout to 1minute (#7398 )	2019-03-20 13:20:09 -07:00
Harshavardhana	c184038b6a	Add proper custom errors object creations (#7387 ) In scenario 1 ``` - bucket/object-prefix - bucket/object-prefix/object ``` Server responds with `XMinioParentIsObject` In scenario 2 ``` - bucket/object-prefix/object - bucket/object-prefix ``` Server responds with `XMinioObjectExistsAsDirectory` Fixes #6566	2019-03-20 13:06:53 -07:00
poornas	12b79d9f3b	Remove duplicate error in switch case. (#7381 ) Fixes: #7380 crypto.ErrInvalidCustomerKey was being handled twice in toAPIErrorCode()	2019-03-19 17:21:05 -07:00
Sidhartha Mani	6bc0de2a75	add go modules file and start running go 1.11 style builds (#7354 )	2019-03-19 13:50:58 -07:00
Krishnan Parthasarathi	8a77a298f2	Add deploymentID to ServerInfo (#7372 )	2019-03-19 16:12:24 +05:30
Harshavardhana	328eb74cbb	Fix regression in peer clients in TLS setups (#7391 ) Regression was introduced in `eb69c4f946`	2019-03-19 09:44:49 +05:30
zy	73be3ed0ca	format import style (#7383 )	2019-03-18 13:07:58 -07:00
Kirill Motkov	3d29ab4059	Rewrite if-else chains to switch statements (#7382 )	2019-03-18 07:46:20 -07:00
Harshavardhana	6702d23d52	Simplify ReadFileStream closer, make sure to flush all HTTP responses (#7374 )	2019-03-18 10:50:26 +05:30
poornas	1011d21416	Fix credential parsing in signature v4 (#7377 ) Fixes #7376	2019-03-16 22:45:42 -07:00
Kirill Motkov	85c5acc088	fix staticcheck warning (#7378 )	2019-03-16 22:44:43 -07:00
kannappanr	eb69c4f946	Use REST api for inter node communication (#7205 )	2019-03-14 16:27:31 -07:00
Anis Elleuch	facbd653ba	Add normal/deep type of heal scanning (#7251 ) Healing scan used to read all objects parts to check for bitrot checksum. This commit will add a quicker way of healing scan by only checking if parts are actually present in disks or not.	2019-03-14 13:08:51 -07:00
Harshavardhana	233824bf92	Configure http2 with higher maxconcurrent streams (#7363 ) This value is needed for Minio's internode communication, read the meaning of this value as per the HTTP 2.0 spec https://http2.github.io/http2-spec/#rfc.section.5.1.2	2019-03-14 11:57:35 -07:00
poornas	a0ee7be050	update link on README (#7361 )	2019-03-14 15:18:12 +05:30
Harshavardhana	91d85a0d53	Fix stale locks held by SelectParquet API (#7364 ) Vendorize upstream parquet-go to fix this issue.	2019-03-13 20:33:18 -07:00
Harshavardhana	7079abc931	Implement HealObjects API to simplify healing (#7351 )	2019-03-13 17:35:09 -07:00
Minio Trusted	8377d00574	Update yaml files to latest version RELEASE.2019-03-13T21-59-47Z	2019-03-13 22:06:26 +00:00
Harshavardhana	285c09fe6b	Support buckets with '.' with etcd+coreDNS (#7353 ) Fixes #7340	2019-03-12 17:57:08 -07:00
kannappanr	ce4563370c	Distributed: Allow healing if all disks are on root partitions (#7358 ) If all the disks are on root partitions in distributed mode, consider it to be a test setup and allow healing to proceed. Fixes #7346	2019-03-12 16:47:06 -07:00
Aditya Manthramurthy	e463386921	Add JSON Path expression evaluation support (#7315 ) - Includes support for FROM clause JSON path	2019-03-09 08:13:37 -08:00
Aditya Manthramurthy	b296b3cf8b	Skip non-bucket dns entry in federated bucket list (#7339 )	2019-03-08 14:22:58 -08:00
Harshavardhana	0b96ad4fdc	http2 throws custom error Content-Length shorter handle it (#7334 ) We should internally handle when http2 input stream has smaller content than its content-length header Upstream issue reported https://github.com/golang/go/issues/30648 This a change which we need to handle internally until Go fixes it correctly, till now our code doesn't expect a custom error to be returned.	2019-03-07 16:11:28 -08:00
Aditya Manthramurthy	f4879ed96d	Use jstream to serialize records to JSON format in S3Select (#7318 ) - Also, switch to jstream to generate internal record representation from CSV/JSON readers - This fixes a bug in which JSON output objects have their keys reversed from the order they are specified in the Select columns. - Also includes a fix for tests.	2019-03-07 00:20:10 -08:00
Aditya Manthramurthy	f97a33a63f	Downgrade node temporarily (#7333 ) To fix jest related build failure as recommended at https://github.com/facebook/jest/issues/8069#issuecomment-470307590	2019-03-06 16:05:49 -08:00
Minio Trusted	6387407e79	Update yaml files to latest version RELEASE.2019-03-06T22-47-10Z	2019-03-06 22:56:46 +00:00