One process that I killed was:
[root@ovirt-node4 ~]# ps axuww | grep qemu-nbd
vdsm 588156 0.0 0.0 308192 39840 ? Ssl Aug26 0:12
/usr/bin/qemu-nbd --socket
/run/vdsm/nbd/c7653559-508b-4e4a-a591-32dec3e5a29d.sock --persistent --shared=8
--export-name= --cache=none --aio=native --allocation-depth --read-only
json:{"driver": "qcow2", "file": {"driver": "file", "filename":
"/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b100d72/images/7a05ff72-370e-4d0c-ab56-5f161cc98318/52ee7e19-ac78-4c05-81e2-0c75dad71732"}}
The event that was talking about "file lock" is this in the engine.log:
2022-08-31 10:39:16,431Z INFO
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetHostJobsVDSCommand]
(EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-91)
[617f02f1-29e6-45f4-b5bc-aa4c16b02b15] FINISH, Ge
tHostJobsVDSCommand, return:
{667f22f0-3df5-43b8-b94d-c0ee48424247=HostJobInfo:{id='667f22f0-3df5-43b8-b94d-c0ee48424247',
type='storage', description='merge_subchain', status='failed', progress='0',
error='VDSError:{co
de='GeneralException', message='General Exception: ('Command
[\'/usr/bin/qemu-img\', \'commit\', \'-p\', \'-t\', \'none\', \'-b\',
\'/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b100d72/im
ages/7a05ff72-370e-4d0c-ab56-5f161cc98318/d0e6f4b9-ae29-493d-b22f-c6aee55d84ae\',
\'-f\', \'qcow2\',
\'/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b100d72/images/7a05ff72-370e-4d0c-ab56-5
f161cc98318/52ee7e19-ac78-4c05-81e2-0c75dad71732\'] failed with rc=1 out=b\'\'
err=bytearray(b\'qemu-img: Could not open
\\\'/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b100d72/images/7a0
5ff72-370e-4d0c-ab56-5f161cc98318/52ee7e19-ac78-4c05-81e2-0c75dad71732\\\':
Failed to get "write" lock\\nIs another process using the image
[/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b1
00d72/images/7a05ff72-370e-4d0c-ab56-5f161cc98318/52ee7e19-ac78-4c05-81e2-0c75dad71732]?\\n\')',)'}'}},
log id: 2c62cd00
so these are the logs related to this qemu-nbd command invocation:
https://cloud.ssis.sm/index.php/s/RSpQJHEeDxai5ea
The other qemu-nbd:
[root@ovirt-node3 ~]# ps -ef | grep qemu-nbd
vdsm 1795830 1 0 Aug26 ? 00:00:09 /usr/bin/qemu-nbd --socket
/run/vdsm/nbd/54097389-db69-4aa3-a34d-eb6cb2c1fc4b.sock --persistent --shared=8
--export-name= --cache=none --aio=native --allocation-depth --read-only
json:{"driver": "qcow2", "file": {"driver": "file", "filename":
"/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b100d72/images/5d18a058-652f-4c94-a9ff-9c15152c61b4/f17c3443-b62f-43f5-b35c-5ba9225abaf4"}}
The engine.log lock event:
2022-08-31 10:23:54,033Z INFO
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetHostJobsVDSCommand]
(EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-91)
[4a3cf96d-5fb8-4479-9eda-4012d1cae8c2] FINISH, GetHostJobsVDSCommand, return:
{f0df76ab-c708-4c0f-ad8e-ecf26c8910d9=HostJobInfo:{id='f0df76ab-c708-4c0f-ad8e-ecf26c8910d9',
type='storage', description='merge_subchain', status='failed', progress='0',
error='VDSError:{code='GeneralException', message='General Exception: ('Command
[\'/usr/bin/qemu-img\', \'commit\', \'-p\', \'-t\', \'none\', \'-b\',
\'/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b100d72/images/5d18a058-652f-4c94-a9ff-9c15152c61b4/f17c3443-b62f-43f5-b35c-5ba9225abaf4\',
\'-f\', \'qcow2\',
\'/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b100d72/images/5d18a058-652f-4c94-a9ff-9c15152c61b4/98ddfc07-8d97-4511-bfef-1ea0ce72b5a6\']
failed with rc=1 out=b\'\' err=bytearray(b\'qemu-img: Failed to get "w
rite" lock\\nIs another process using the image
[/rhev/data-center/mnt/glusterSD/localhost:_gv0/60b7f172-08ed-4a22-8414-31fd5b100d72/images/5d18a058-652f-4c94-a9ff-9c15152c61b4/f17c3443-b62f-43f5-b35c-5ba9225abaf4]?\\n\')',)'}'}},
log id: 380108e6
and these are related log:
https://cloud.ssis.sm/index.php/s/p3LAAkXxRrAbdxK
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