[LU-1478] 1.8.6.81 client with 2.1.1 server MPIIO file locking issue

• Type: Bug
• Resolution: Cannot Reproduce
• Priority: Minor
• Affects Version/s: Lustre 2.1.1, Lustre 1.8.6
• Environment: Clients: Lustre-1.8.6; Server: Lustre 2.1.1
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Mahmoud Hanafi

Description

Running a MPI-IO task requiring concurrent read locks fail using 1.8.6 clients on a 2.1.1 server. The issue is not present in 2.1.1 clients.

Easily duplicated by running a test mpi-io job on a 1.8.6 client. I used this benchmark.
http://public.lanl.gov/jnunez/benchmarks/mpiiotest.htm

Issue Links

• Trackbacks: Lustre 1.8.x known issues tracker While testing against Lustre b18 branch, we would hit known bugs which were already reported in Lustre Bugzilla https://bugzilla.lustre.org/. In order to move away from relying on Bugzilla, we would create a JIRA