Files
minio/cmd
Feng Ruohang 7a13780d81 fix(ilm): queue version heals when an undecodable history refuses a purge
A purge of all versions reads the history of the key in every pool
before it checks the drives. When half of the drives of a set could not
be read or decoded, objectVersions refused the history with a read
quorum error and the purge failed with InsufficientWriteQuorum before
deleteAllDrives, which alone queued a heal of each version when a drive
did not decode. With parity of half the drives, a key whose metadata
did not decode on exactly half of them still read and healed, but no
purge queued that heal: the refusal repeated until a scanner or drive
heal happened to repair the drives.

objectVersions now refuses such a history with undecodableHistory,
which wraps the read quorum error and carries the IDs of the versions
the decodable drives hold, the null version by its explicit ID. The
purge queues a heal of each of them before it fails, from the history
of the rule check as from the placement read, and still returns
InsufficientWriteQuorum. The threshold of unknown drives, the refusal
and every other caller of the history are unchanged; expiryApplies
matches the read quorum error through the wrapper.

TestPurgeAllVersionsHealsUndecodableHistory corrupts the metadata CRC
on four of eight drives; before this change the purge refused the key
without queuing any heal.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Signed-off-by: Feng Ruohang <rh@vonng.com>
2026-11-07 17:04:02 +08:00
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