[LU-5475] readdir missing a directory

• Type: Bug
• Resolution: Duplicate
• Priority: Major
• Fix Version/s: Lustre 2.7.0, Lustre 2.5.4
• Affects Version/s: Lustre 2.4.2
• Labels: llnl
• Severity: 3
• Assignee: Oleg Drokin
• Reporter: Christopher Morrone (Inactive)

Description

A directory tree was copied into a subdirectory of Lustre. At least one of the subdirectories in the newly created tree in Lustre does not appear in its parent's directory listing. The directory does exist, and it is possible to cd into that unlisted directory.

The same behavior is exhibited from multiple clients, so it is not a problem of just one client's cache being corrupt.

We are seeing this with the LLNL branch of Lustre 2.4.2 (github.com/chaos/lustre).

We could not identify any console messages associated with the problem.

The problem was seen on the secure network, so we cannot directly provide any logs.

This problem has suspiciously similar symptoms in common with LU-5254.

Issue Links

• is related to: LU-5924 conf-sanity test_32b: list verification failed
• is related to: LU-3573 lustre-rsync-test test_8: @@@@@@ FAIL: Failure in replication; differences found.
• is related to: LU-5254 readdir missing a directory

Comments

[Nathaniel Clark]

This was fixed by LU-3573

[Peter Jones]

Just to capture that the latest version of LU-3573 has been landed to master for over a month and back ported to b2_5 also. I think that this should be safe to try out

[Peter Jones]

Heads up that LU-5924 seems related to the LU-3573 fix

[Peter Jones]

Chris

The patch for LU-3573 has landed to master. Do you have any known cases of affected files to verify the fix?

Peter

[Peter Jones]

Just to be clear - updates are on LU-3573

[Nathaniel Clark]

I have reproduced a very similar issue where readdir is missing a file. I can reproduce this on a ZFS backed MDT with high regularity.