[LU-3439] User code creating multiple lockfiles with same name

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.1.5
• Environment: Lustre: 2.1.5; OFED: 1.5.4.1; Kernel: 2.6.32-279.el6.x86_64
• Severity: 3
• Assignee: Lai Siyao
• Reporter: Karl W Schulz (Inactive)

Description

Not sure if this a known issue already, but we have a user who noticed they can create identical filenames within a single directory via their home-grown locking mechanism. We have worked with them to create a small reproducer which shows the issue on 6 Lustre clients (96 MPI tasks). The net effect of running this test is creation of duplicate filenames:

{{c558-801$ ls -l lockdir/
total 12
---------- 1 karl G-800747 52 Jun 5 08:39 Lockfile.lck
---------- 1 karl G-800747 52 Jun 5 08:39 Lockfile.lck
---------- 1 karl G-800747 52 Jun 5 08:39 Lockfile.lck}}

Tarball attached with user code and example output from our Stampede environment. We can confirm that we do not get the repeat filenames when running the reproducer on Lustre 1.8.6

Thanks.

Issue Links

• is related to: LU-2901 Duplicate filename on the same ldiskfs directory on MDS