Unable to delete VM snapshots. Error messages and log info below.

Running oVirt VM 4.2.8.2-1.el7,

I haven't been able to find good documentation on how to fix.   Can someone point me in the right direction?


Thank you,

... Dean



Feb 28, 2019, 3:32:34 PM
Failed to delete snapshot 'Centos7_20190120' for VM 'n2_Centos7'.


Feb 28, 2019, 3:32:28 PM
VDSM n1 command HSMGetAllTasksStatusesVDS failed: Volume does not exist: (u'b2391a0b-c9e5-4dfe-9551-1e1f25c5c622',)


Feb 28, 2019, 3:32:22 PM
VDSM n2 command MergeVDS failed: Merge failed


The VM has snapshot(s) with disk(s) in illegal status.   Please don't shutdown the vm before successfully retrying the snapshot delete.


engine.log

2019-02-28 15:32:33,420-05 ERROR [org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-39) [f702317d-87cc-41dd-bcb2-12c6a2a93f10] Merging o
f snapshot '3ddab9e6-a6ce-40d6-9ec6-815251471c5f' images 'fb974fb8-99d3-4a69-9f4e-096e30b85749'..'b2391a0b-c9e5-4dfe-9551-1e1f25c5c622' failed. Images have been marked illegal and can no longer be previewed
or reverted to. Please retry Live Merge on the snapshot to complete the operation.
2019-02-28 15:32:33,429-05 ERROR [org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-39) [f702317d-87cc-41dd-bcb2-12c6a2a93f10] Ending co
mmand 'org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand' with failure.
2019-02-28 15:32:33,578-05 INFO  [org.ovirt.engine.core.bll.ConcurrentChildCommandsExecutionCallback] (EE-ManagedThreadFactory-engineScheduled-Thread-39) [f702317d-87cc-41dd-bcb2-12c6a2a93f10] Command 'Remov
eSnapshot' id: '2243e15a-2569-498c-b0f8-de345321ba2f' child commands '[2e8dccfe-1c17-40ec-9f98-84f61863e450]' executions were completed, status 'FAILED'
2019-02-28 15:32:34,773-05 ERROR [org.ovirt.engine.core.bll.snapshots.RemoveSnapshotCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-10) [f702317d-87cc-41dd-bcb2-12c6a2a93f10] Ending command 'org.ovi
rt.engine.core.bll.snapshots.RemoveSnapshotCommand' with failure.
2019-02-28 15:32:35,023-05 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engineScheduled-Thread-10) [f702317d-87cc-41dd-bcb2-12c6a2a93f10] EVENT_ID: USER_REMOVE_SNAPSHOT_FINISHED_FAILURE(357), Failed to delete snapshot 'Centos7_20190120' for VM 'n2_Centos7'.


vdsm.log

2019-02-28 15:32:22,251-0500 INFO  (jsonrpc/7) [jsonrpc.JsonRpcServer] RPC call Host.getStats succeeded in 0.02 seconds (__init__:573)
2019-02-28 15:32:22,326-0500 INFO  (jsonrpc/0) [root] /usr/libexec/vdsm/hooks/after_get_caps/50_openstacknet: rc=0 err= (hooks:110)
2019-02-28 15:32:22,449-0500 INFO  (jsonrpc/6) [api.host] START getAllVmStats() from=::ffff:192.168.1.10,48074 (api:46)
2019-02-28 15:32:22,452-0500 INFO  (jsonrpc/6) [api.host] FINISH getAllVmStats return={'status': {'message': 'Done', 'code': 0}, 'statsList': (suppressed)} from=::ffff:192.168.1.10,48074 (api:52)
2019-02-28 15:32:22,453-0500 INFO  (jsonrpc/6) [jsonrpc.JsonRpcServer] RPC call Host.getAllVmStats succeeded in 0.00 seconds (__init__:573)
2019-02-28 15:32:22,669-0500 INFO  (jsonrpc/4) [api.virt] START merge(drive={u'imageID': u'96fbec76-c518-4010-8988-46b3c3172f09', u'volumeID': u'f7f1a3ec-d936-4482-8ec9-af2b3990b111', u'domainID': u'34af4473
-0779-42a0-8b97-e1ccc725fd60', u'poolID': u'5a3025a3-005f-03d4-0333-000000000382'}, baseVolUUID=u'fb974fb8-99d3-4a69-9f4e-096e30b85749', topVolUUID=u'b2391a0b-c9e5-4dfe-9551-1e1f25c5c622', bandwidth=u'0', jo
bUUID=u'0b551b37-a6ee-4ac7-a004-2d410eaa8304') from=::ffff:192.168.1.10,48074, flow_id=f702317d-87cc-41dd-bcb2-12c6a2a93f10, vmId=a9082c6d-038e-4eb5-8436-69f93839a2ec (api:46)
2019-02-28 15:32:22,693-0500 INFO  (jsonrpc/0) [root] /usr/libexec/vdsm/hooks/after_get_caps/openstacknet_utils.py: rc=0 err= (hooks:110)
2019-02-28 15:32:22,730-0500 ERROR (jsonrpc/4) [virt.vm] (vmId='a9082c6d-038e-4eb5-8436-69f93839a2ec') merge: Cannot find volume b2391a0b-c9e5-4dfe-9551-1e1f25c5c622 in drive vda's volume chain (vm:5944)
2019-02-28 15:32:22,731-0500 INFO  (jsonrpc/4) [api.virt] FINISH merge return={'status': {'message': 'Merge failed', 'code': 52}} from=::ffff:192.168.1.10,48074, flow_id=f702317d-87cc-41dd-bcb2-12c6a2a93f10,
 vmId=a9082c6d-038e-4eb5-8436-69f93839a2ec (api:52)
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