[LU-5525] ASSERTION( new_lock->l_readers + new_lock->l_writers == 0 ) failed

• Type: Bug
• Resolution: Duplicate
• Priority: Critical
• Labels: llnl
• Environment: MDS node, Lustre 2.4.2-14chaos, ZFS OBD
• Severity: 3
• Assignee: Bruno Faccini (Inactive)
• Reporter: Christopher Morrone (Inactive)

Description

After upgrading to lustre 2.4.2-14chaos (see github.com/chaos/lustre), we soon hit the following assertion on one of our MDS nodes:

mdt_handler.c:3652:mdt_intent_lock_replace()) ASSERTION( new_lock->l_readers + new_lock->l_writers == 0 ) failed

Perhaps most significantly, this tag of our lustre tree includes the patch entitled:

LU-4584 mdt: ensure orig lock is found in hash upon resend

James Simmons reported this assertion when he tested the LU-4584 patch, but the Bruno made the evaluation that the assertion was unrelated to the patch.

Whether it is related or not, we need to fix the problem.

Issue Links

• is related to: LU-5632 ldlm_lock_addref()) ASSERTION( lock != ((void *)0) )
• is related to: LU-4584 Lock revocation process fails consistently
• is related to: LU-3428 Fix 'uninitialized variables' errors