Files
minio/cmd
Feng Ruohang 254b19ac07 fix(replication): recheck queued delete-marker creations under the lock
A delete-marker creation task carries the marker as it looked when it
was queued by the DELETE handler, a GET/HEAD/LIST heal, the scanner or
MRF. Tasks from several frontends serialize on the per-object
replication lock, so a task can run after the user has purged that
marker and the purge has already reached the targets. The target no
longer holds the marker, so the queued creation recreated it there with
the original VersionID and mtime. This is the late-create sequence seen
in the 2026-09-16 three-site runs: purge 204 on both targets, then about
85 ms later a replicated creation for the same VersionID.

Re-read the source version under the replication lock before sending a
creation. A missing version, a non-marker version, or a version under
purge makes the task stale; it is dropped without touching the source.
A read that cannot confirm either way is retried through MRF instead of
being treated as absence.

Creations already on the wire, replays from other sites, and cleanup of
minority residue after a crash are not covered by this check.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Signed-off-by: Feng Ruohang <rh@vonng.com>
2026-09-16 22:35:08 +08:00
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