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<p>Hi list,</p>
<p>recently I've noted a strange behaviour of my gluster storage,
sometimes while executing a simple command like "gluster volume
status vm-images-repo" as a response I got "Another transaction is
in progress for vm-images-repo. Please try again after sometime.".
This situation does not get solved simply waiting for but I've to
restart glusterd on the node that hold (and does not release) the
lock, this situation occur randomly after some days. In the
meanwhile, prior and after the issue appear, everything is working
as expected.</p>
<p>I'm using gluster 3.8.12 on CentOS 7.3, the only relevant
information that I found on the log file
(etc-glusterfs-glusterd.vol.log) of my three nodes are the
following:</p>
<p>* node1, at the moment the issue begins:</p>
<p>[2017-07-19 15:07:43.130203] W
[glusterd-locks.c:572:glusterd_mgmt_v3_lock]
(-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x3a00f)
[0x7f373f25f00f]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x2ba25)
[0x7f373f250a25]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0xd048f)
[0x7f373f2f548f] ) 0-management: Lock for vm-images-repo held by
2c6f154f-efe3-4479-addc-b2021aa9d5df<br>
[2017-07-19 15:07:43.128242] I [MSGID: 106499]
[glusterd-handler.c:4349:__glusterd_handle_status_volume]
0-management: Received status volume req for volume vm-images-repo<br>
[2017-07-19 15:07:43.130244] E [MSGID: 106119]
[glusterd-op-sm.c:3782:glusterd_op_ac_lock] 0-management: Unable
to acquire lock for vm-images-repo<br>
[2017-07-19 15:07:43.130320] E [MSGID: 106376]
[glusterd-op-sm.c:7775:glusterd_op_sm] 0-management: handler
returned: -1<br>
[2017-07-19 15:07:43.130665] E [MSGID: 106116]
[glusterd-mgmt.c:135:gd_mgmt_v3_collate_errors] 0-management:
Locking failed on virtnode-0-1-gluster. Please check log file for
details.<br>
[2017-07-19 15:07:43.131293] E [MSGID: 106116]
[glusterd-mgmt.c:135:gd_mgmt_v3_collate_errors] 0-management:
Locking failed on virtnode-0-2-gluster. Please check log file for
details.<br>
[2017-07-19 15:07:43.131360] E [MSGID: 106151]
[glusterd-syncop.c:1884:gd_sync_task_begin] 0-management: Locking
Peers Failed.<br>
[2017-07-19 15:07:43.132005] E [MSGID: 106116]
[glusterd-mgmt.c:135:gd_mgmt_v3_collate_errors] 0-management:
Unlocking failed on virtnode-0-2-gluster. Please check log file
for details.<br>
[2017-07-19 15:07:43.132182] E [MSGID: 106116]
[glusterd-mgmt.c:135:gd_mgmt_v3_collate_errors] 0-management:
Unlocking failed on virtnode-0-1-gluster. Please check log file
for details.</p>
<p>* node2, at the moment the issue begins:</p>
<p>[2017-07-19 15:07:43.131975] W
[glusterd-locks.c:572:glusterd_mgmt_v3_lock]
(-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x3a00f)
[0x7f17b5b9e00f]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x2ba25)
[0x7f17b5b8fa25]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0xd048f)
[0x7f17b5c3448f] ) 0-management: Lock for vm-images-repo held by
d9047ecd-26b5-467b-8e91-50f76a0c4d16<br>
[2017-07-19 15:07:43.132019] E [MSGID: 106119]
[glusterd-op-sm.c:3782:glusterd_op_ac_lock] 0-management: Unable
to acquire lock for vm-images-repo<br>
[2017-07-19 15:07:43.133568] W
[glusterd-locks.c:686:glusterd_mgmt_v3_unlock]
(-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x3a00f)
[0x7f17b5b9e00f]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x2b712)
[0x7f17b5b8f712]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0xd082a)
[0x7f17b5c3482a] ) 0-management: Lock owner mismatch. Lock for vol
vm-images-repo held by d9047ecd-26b5-467b-8e91-50f76a0c4d16<br>
[2017-07-19 15:07:43.133597] E [MSGID: 106118]
[glusterd-op-sm.c:3845:glusterd_op_ac_unlock] 0-management: Unable
to release lock for vm-images-repo<br>
The message "E [MSGID: 106376]
[glusterd-op-sm.c:7775:glusterd_op_sm] 0-management: handler
returned: -1" repeated 3 times between [2017-07-19
15:07:42.976193] and [2017-07-19 15:07:43.133646]<br>
</p>
<p>* node3, at the moment the issue begins:</p>
<p>[2017-07-19 15:07:42.976593] I [MSGID: 106499]
[glusterd-handler.c:4349:__glusterd_handle_status_volume]
0-management: Received status volume req for volume vm-images-repo<br>
[2017-07-19 15:07:43.129941] W
[glusterd-locks.c:572:glusterd_mgmt_v3_lock]
(-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x3a00f)
[0x7f6133f5b00f]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x2ba25)
[0x7f6133f4ca25]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0xd048f)
[0x7f6133ff148f] ) 0-management: Lock for vm-images-repo held by
d9047ecd-26b5-467b-8e91-50f76a0c4d16<br>
[2017-07-19 15:07:43.129981] E [MSGID: 106119]
[glusterd-op-sm.c:3782:glusterd_op_ac_lock] 0-management: Unable
to acquire lock for vm-images-repo<br>
[2017-07-19 15:07:43.130034] E [MSGID: 106376]
[glusterd-op-sm.c:7775:glusterd_op_sm] 0-management: handler
returned: -1<br>
[2017-07-19 15:07:43.130131] E [MSGID: 106275]
[glusterd-rpc-ops.c:876:glusterd_mgmt_v3_lock_peers_cbk_fn]
0-management: Received mgmt_v3 lock RJT from uuid:
2c6f154f-efe3-4479-addc-b2021aa9d5df<br>
[2017-07-19 15:07:43.130710] W
[glusterd-locks.c:686:glusterd_mgmt_v3_unlock]
(-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x3a00f)
[0x7f6133f5b00f]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0x2b712)
[0x7f6133f4c712]
-->/usr/lib64/glusterfs/3.8.12/xlator/mgmt/glusterd.so(+0xd082a)
[0x7f6133ff182a] ) 0-management: Lock owner mismatch. Lock for vol
vm-images-repo held by d9047ecd-26b5-467b-8e91-50f76a0c4d16<br>
[2017-07-19 15:07:43.130733] E [MSGID: 106118]
[glusterd-op-sm.c:3845:glusterd_op_ac_unlock] 0-management: Unable
to release lock for vm-images-repo<br>
[2017-07-19 15:07:43.130771] E [MSGID: 106376]
[glusterd-op-sm.c:7775:glusterd_op_sm] 0-management: handler
returned: -1</p>
<p>The thing that is really strange is that in this case the uuid of
node3 is d9047ecd-26b5-467b-8e91-50f76a0c4d16!</p>
<p>The mapping nodename-uuid is:</p>
<p>* (node1) virtnode-0-0-gluster:
2c6f154f-efe3-4479-addc-b2021aa9d5df</p>
<p>* (node2) virtnode-0-1-gluster:
e93ebee7-5d95-4100-a9df-4a3e60134b73</p>
<p>* (node3) virtnode-0-2-gluster:
d9047ecd-26b5-467b-8e91-50f76a0c4d16<br>
<br>
</p>
<p>In this case restarting glusterd on node3 usually solve the
issue.</p>
<p>What could be the root cause of this behavior? How can I fix this
<span id="result_box" class="short_text" lang="en"><span class="">once
and for all?</span></span></p>
<p><span id="result_box" class="short_text" lang="en"><span class="">If
needed I could provide the full log file.<br>
</span></span></p>
<p><br>
</p>
<p>Greetings,</p>
<p> Paolo Margara<br>
</p>
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