[LU-2397] Assertion triggered in check_for_next_transno

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.4.0
• Labels: LB
• Severity: 3
• Assignee: Mikhail Pershin
• Reporter: Prakash Surya (Inactive)

Description

I did a quick search of the existing bugs, but didn't find this one.

Running the replay-single test in a single node VM setup I triggered the following:

LustreError: 14716:0:(ldlm_lib.c:1749:check_for_next_transno()) ASSERTION( req_transno >= next_transno ) failed: req_transno: 0, next_transno: 51539608157
LustreError: 14716:0:(ldlm_lib.c:1749:check_for_next_transno()) LBUG
Kernel panic - not syncing: LBUG
Pid: 14716, comm: tgt_recov Tainted: P           ---------------    2.6.32-279.9.1.1chaos.ch5.1.x86_64 #1
Call Trace:
 [<ffffffff814fdceb>] ? panic+0xa0/0x168
 [<ffffffffa0705f6b>] ? lbug_with_loc+0x9b/0xb0 [libcfs]
 [<ffffffffa0991e75>] ? check_for_next_transno+0x585/0x590 [ptlrpc]
 [<ffffffffa09918f0>] ? check_for_next_transno+0x0/0x590 [ptlrpc]
 [<ffffffffa098be0e>] ? target_recovery_overseer+0x5e/0x250 [ptlrpc]
 [<ffffffffa098a270>] ? exp_req_replay_healthy+0x0/0x30 [ptlrpc]
 [<ffffffffa0716591>] ? libcfs_debug_msg+0x41/0x50 [libcfs]
 [<ffffffffa0992f55>] ? target_recovery_thread+0x7b5/0x19d0 [ptlrpc]
 [<ffffffffa09927a0>] ? target_recovery_thread+0x0/0x19d0 [ptlrpc]
 [<ffffffff8100c14a>] ? child_rip+0xa/0x20
 [<ffffffffa09927a0>] ? target_recovery_thread+0x0/0x19d0 [ptlrpc]
 [<ffffffffa09927a0>] ? target_recovery_thread+0x0/0x19d0 [ptlrpc]
 [<ffffffff8100c140>] ? child_rip+0x0/0x20

The test case was simply:

$ sudo ONLY="59 60" FSTYPE=zfs ./lustre/tests/replay-single.sh