[Gluster-users] held cluster lock blocking volume operations

Matthew Nicholson matthew_nicholson at harvard.edu
Tue Jun 4 14:27:25 UTC 2013

So, we've got a volume that is mostly functioning fine (its up accessible,
etc etc). However, volume operations fail/don't return on it.

what i mean is

gluster peer status//probe/etc : works
gluster volume info : works
gluster volume status/remove-brick/etc : sit for a long time and return

The only things coming up in logs are:

[2013-06-04 10:21:36.398072] I [glusterd-utils.c:285:glusterd_lock]
0-glusterd: Cluster lock held by 757297b4-5648-4e31-88f4-00fc167a43e4
[2013-06-04 10:21:36.398123] I
[glusterd-handler.c:463:glusterd_op_txn_begin] 0-management: Acquired local
[2013-06-04 10:21:36.398424] I
[glusterd-handler.c:502:glusterd_handle_cluster_lock] 0-glusterd: Received
LOCK from uuid: 757297b4-5648-4e31-88f4-00fc167a43e4
[2013-06-04 10:21:36.398448] E [glusterd-utils.c:277:glusterd_lock]
0-glusterd: Unable to get lock for uuid:
757297b4-5648-4e31-88f4-00fc167a43e4, lock held by:
[2013-06-04 10:21:36.398483] I
[glusterd-handler.c:1322:glusterd_op_lock_send_resp] 0-glusterd: Responded,
ret: 0
[2013-06-04 10:21:36.398498] E [glusterd-op-sm.c:4624:glusterd_op_sm]
0-glusterd: handler returned: -1

If you notice, the UUID holding the lock, and the uuid requesting the lock,
are the same. So it seems like a lock was "forgotten" about?

any thoughts on clearing this?
Matthew Nicholson
Research Computing Specialist
Harvard FAS Research Computing
matthew_nicholson at harvard.edu
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