[LU-11765] during failover test run, mdtest job fails, numerous stat failures 'No such file or directory'

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.13.0
• Labels: patch
• Severity: 3
• Assignee: Sergey Cheremencev
• Reporter: Sergey Cheremencev

Description

Running a failover test(random failover of OSSs + mdtest), an mdtest job failed reporting stat failures. This looked similar to LU-11760, except that this time all the files were actually present, valid after the job failure.

V-1: Entering create_remove_items_helper...
V-1: Entering unique_dir_access...
V-1: Entering mdtest_stat...
08/19/2018 07:15:43: Process 10(nid00265): FAILED in mdtest_stat, unable to stat file: No such file or directory
08/19/2018 07:15:43: Process 15(nid00279): FAILED in mdtest_stat, unable to stat file: No such file or directory
Rank 10 [Sun Aug 19 07:15:43 2018] [c1-0c0s4n1] application called MPI_Abort(MPI_COMM_WORLD, 1) - process 10
Rank 15 [Sun Aug 19 07:15:43 2018] [c1-0c0s4n3] application called MPI_Abort(MPI_COMM_WORLD, 1) - process 15

Details of fail reason could be found in a patch commit message. I will upload it in the nearest time.