Hello 
I have a situation with a vm in which I cannot delete the snapshot. 
The whole thing is quite strange because I can delete the snapshot when I 
create and delete it from the web interface but when I do it with a python 
script through the API it failes.
The script does create snapshot-> download snapshot-> delete snapshot and I 
used the examples from ovirt python sdk on githab to create it ,in general it 
works prety well.

But on a specific machine (so far) it cannot delete the live snapshot
Ovirt is 4.3.10 and the guest is a windows 10 pc. Windows 10 guest has 2 disks 
attached both on different fc domains one on an ssd  emc and the other on an 
hdd emc. Both disks are prealocated.
I cannot figure out what the problem is so far 
the related engine log:

2021-08-03 15:51:00,385+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-61) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Comma
nd 'RemoveSnapshotSingleDiskLive' (id: '80dc4609-b91f-4e93-bc12-7b2083933e5a') 
waiting on child command id: '74c83880-581b-4774-ae51-8c4af0c92c53' 
type:'Merge' to complete
2021-08-03 15:51:00,385+03 INFO  
[org.ovirt.engine.core.bll.MergeCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-61) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Waiting on merge command to complete (
jobId = 62bf8c83-cd78-42a5-b57d-d67ddfdee8ee)
2021-08-03 15:51:00,387+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-61) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
(id: '87bc90c7-2aa5-4a1b-b58c-54296518658a') waiting on child command id: 
'ec806ac6-929f-42d9-a86e-98d6a39a4718' type:'Merge' to complete
2021-08-03 15:51:01,388+03 INFO  
[org.ovirt.engine.core.bll.MergeCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-30) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Waiting on merge command to complete 
(jobId = c57fb3e5-da20-4838-8db3-31655ba76c1f)
2021-08-03 15:51:07,491+03 INFO  
[org.ovirt.engine.core.bll.ConcurrentChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-38) 
[b929fd4a-8ce7-408f-927d-ab0169879c4e] Command 'MoveImageGroup' (id: 
'1de1b800-873f-405f-805b-f44397740909') waiting on child command id: 
'd1136344-2888-4d63-8fe1-b506426bc8aa' type:'CopyImageGroupWithData' to complete
2021-08-03 15:51:11,513+03 INFO  
[org.ovirt.engine.core.bll.ConcurrentChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-41) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshot' (id: 
'04e9d61e-28a2-4ab0-9bb7-5c805ee871e9') waiting on child command id: 
'87bc90c7-2aa5-4a1b-b58c-54296518658a' type:'RemoveSnapshotSingleDiskLive' to 
complete
2021-08-03 15:51:12,522+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-76) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
(id: '80dc4609-b91f-4e93-bc12-7b2083933e5a') waiting on child command id: 
'74c83880-581b-4774-ae51-8c4af0c92c53' type:'Merge' to complete
2021-08-03 15:51:12,523+03 INFO  
[org.ovirt.engine.core.bll.MergeCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-76) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Waiting on merge command to complete 
(jobId = 62bf8c83-cd78-42a5-b57d-d67ddfdee8ee)
2021-08-03 15:51:12,527+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-76) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
(id: '87bc90c7-2aa5-4a1b-b58c-54296518658a') waiting on child command id: 
'ec806ac6-929f-42d9-a86e-98d6a39a4718' type:'Merge' to complete
2021-08-03 15:51:13,528+03 INFO  
[org.ovirt.engine.core.bll.MergeCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-37) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Waiting on merge command to complete 
(jobId = c57fb3e5-da20-4838-8db3-31655ba76c1f)
2021-08-03 15:51:21,635+03 INFO  
[org.ovirt.engine.core.bll.ConcurrentChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-58) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshot' (id: 
'04e9d61e-28a2-4ab0-9bb7-5c805ee871e9') waiting on child command id: 
'87bc90c7-2aa5-4a1b-b58c-54296518658a' type:'RemoveSnapshotSingleDiskLive' to 
complete
2021-08-03 15:51:22,655+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-31) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
(id: '80dc4609-b91f-4e93-bc12-7b2083933e5a') waiting on child command id: 
'74c83880-581b-4774-ae51-8c4af0c92c53' type:'Merge' to complete
2021-08-03 15:51:22,661+03 INFO  
[org.ovirt.engine.core.bll.MergeCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-31) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Merge command (jobId = 
62bf8c83-cd78-42a5-b57d-d67ddfdee8ee) has completed for images 
'7611ebcf-5323-45ca-b16c-9302d0bdedc6'..'17618ba1-4ab8-49eb-a991-fc3d602ced14'
2021-08-03 15:51:22,664+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-31) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
(id: '87bc90c7-2aa5-4a1b-b58c-54296518658a') waiting on child command id: 
'ec806ac6-929f-42d9-a86e-98d6a39a4718' type:'Merge' to complete
2021-08-03 15:51:23,664+03 INFO  
[org.ovirt.engine.core.bll.MergeCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-41) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Waiting on merge command to complete 
(jobId = c57fb3e5-da20-4838-8db3-31655ba76c1f)
2021-08-03 15:51:24,672+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-6) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Executing Live Merge command step 
'MERGE_STATUS'
2021-08-03 15:51:24,699+03 INFO  [org.ovirt.engine.core.bll.MergeStatusCommand] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-1) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Running command: MergeStatusCommand 
internal: true. Entities affected :  ID: 96000ec9-e181-44eb-893f-e0a36e3a6775 
Type: Storage
8-03 15:51:24,749+03 INFO  [org.ovirt.engine.core.bll.MergeStatusCommand] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-1) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Successfully removed volume 17618ba1-4
ab8-49eb-a991-fc3d602ced14 from the chain
2021-08-03 15:51:24,749+03 INFO  [org.ovirt.engine.core.bll.MergeStatusCommand] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-1) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Volume merge type 'COMMIT'
2021-08-03 15:51:25,691+03 INFO  
[org.ovirt.engine.core.bll.SerialChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-5) 
[b929fd4a-8ce7-408f-927d-ab0169879c4e] Command 'CopyImageGroup
WithData' (id: 'd1136344-2888-4d63-8fe1-b506426bc8aa') waiting on child command 
id: 'b40aeec9-b7cf-4ee5-9683-54d98f4307d5' type:'CopyImageGroupVolumesData' to 
complete
2021-08-03 15:51:26,692+03 INFO  
[org.ovirt.engine.core.bll.SerialChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-35) 
[b929fd4a-8ce7-408f-927d-ab0169879c4e] Command 'CopyImageGrou
pVolumesData' (id: 'b40aeec9-b7cf-4ee5-9683-54d98f4307d5') waiting on child 
command id: 'f46d65cb-32d9-4269-982e-6e19331b8a27' type:'CopyData' to complete
2021-08-03 15:51:26,711+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-35) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Executing Liv
e Merge command step 'DESTROY_IMAGE'
2021-08-03 15:51:26,726+03 INFO  
[org.ovirt.engine.core.bll.storage.disk.image.DestroyImageCommand] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Running command: 
DestroyImageCommand internal: true. Entities affected :  ID: 
96000ec9-e181-44eb-893f-e0a36e3a6775 Type: Storage
2021-08-03 15:51:26,747+03 INFO  
[org.ovirt.engine.core.vdsbroker.irsbroker.DestroyImageVDSCommand] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] START, DestroyIma
geVDSCommand( 
DestroyImageVDSCommandParameters:{storagePoolId='5da76866-7b7d-11eb-9913-00163e1f2643',
 ignoreFailoverLimit='false', 
storageDomainId='96000ec9-e181-44eb-893f-e0a36e3a6775', imageGroupId='205a30a3-f
c06-4ceb-8ef2-018f16d4ccbb', imageId='00000000-0000-0000-0000-000000000000', 
imageList='[17618ba1-4ab8-49eb-a991-fc3d602ced14]', postZero='false', 
force='false'}), log id: 307a3fb1
2021-08-03 15:51:26,834+03 INFO  
[org.ovirt.engine.core.vdsbroker.irsbroker.DestroyImageVDSCommand] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] FINISH, DestroyIm
ageVDSCommand, return: , log id: 307a3fb1
2021-08-03 15:51:26,846+03 INFO  
[org.ovirt.engine.core.bll.tasks.CommandAsyncTask] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] CommandAsyncTask::Adding CommandM
ultiAsyncTasks object for command 'baaa5254-261c-452a-84b4-0a8b397cdb62'
2021-08-03 15:51:26,847+03 INFO  
[org.ovirt.engine.core.bll.CommandMultiAsyncTasks] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] CommandMultiAsyncTasks::attachTas
k: Attaching task 'ae2e80a4-d224-4fc3-a84b-859042811525' to command 
'baaa5254-261c-452a-84b4-0a8b397cdb62'.
2021-08-03 15:51:26,857+03 INFO  
[org.ovirt.engine.core.bll.tasks.AsyncTaskManager] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Adding task 'ae2e80a4-d224-4fc3-a
84b-859042811525' (Parent Command 'DestroyImage', Parameters Type 
'org.ovirt.engine.core.common.asynctasks.AsyncTaskParameters'), polling hasn't 
started yet..
2021-08-03 15:51:26,858+03 INFO  
[org.ovirt.engine.core.bll.storage.disk.image.DestroyImageCommand] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Successfully star
ted task to remove orphaned volumes
2021-08-03 15:51:26,863+03 INFO  [org.ovirt.engine.core.bll.tasks.SPMAsyncTask] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] BaseAsyncTask::startPollingTask: Star
ting to poll task 'ae2e80a4-d224-4fc3-a84b-859042811525'.
2021-08-03 15:51:26,863+03 INFO  [org.ovirt.engine.core.bll.tasks.SPMAsyncTask] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-10) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] BaseAsyncTask::startPollingTask: Star
ting to poll task 'ae2e80a4-d224-4fc3-a84b-859042811525'.
2021-08-03 15:51:28,799+03 INFO  
[org.ovirt.engine.core.bll.storage.disk.image.DestroyImageCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-88) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Waiting on destroy image command to 
complete the task (taskId = ae2e80a4-d224-4fc3-a84b-859042811525)
2021-08-03 15:51:30,805+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-48) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
(id: '80dc4609-b91f-4e93-bc12-7b2083933e5a') waiting on child command id: 
'baaa5254-261c-452a-84b4-0a8b397cdb62' type:'DestroyImage' to complete
2021-08-03 15:51:31,824+03 INFO  
[org.ovirt.engine.core.bll.ConcurrentChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-97) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshot' (id: 
'04e9d61e-28a2-4ab0-9bb7-5c805ee871e9') waiting on child command id: 
'87bc90c7-2aa5-4a1b-b58c-54296518658a' type:'RemoveSnapshotSingleDiskLive' to 
complete
2021-08-03 15:51:32,825+03 INFO  
[org.ovirt.engine.core.bll.storage.disk.image.DestroyImageCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-33) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Waiting on destroy image command to 
complete the task (taskId = ae2e80a4-d224-4fc3-a84b-859042811525)
2021-08-03 15:51:32,831+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-33) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
(id: '87bc90c7-2aa5-4a1b-b58c-54296518658a') waiting on child command id: 
'ec806ac6-929f-42d9-a86e-98d6a39a4718' type:'Merge' to complete
2021-08-03 15:51:33,594+03 INFO  
[org.ovirt.engine.core.bll.tasks.CommandAsyncTask] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] CommandAsyncTask::HandleEndActionResult 
[within thread]: endAction for action type 'DestroyImage' completed, handling 
the result.
2021-08-03 15:51:33,594+03 INFO  
[org.ovirt.engine.core.bll.tasks.CommandAsyncTask] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] CommandAsyncTask::HandleEndActionResult 
[within thread]: endAction for action type 'DestroyImage' succeeded, clearing 
tasks.
2021-08-03 15:51:33,594+03 INFO  [org.ovirt.engine.core.bll.tasks.SPMAsyncTask] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] SPMAsyncTask::ClearAsyncTask: Attempting 
to clear task 'ae2e80a4-d224-4fc3-a84b-859042811525'
2021-08-03 15:51:33,595+03 INFO  
[org.ovirt.engine.core.vdsbroker.irsbroker.SPMClearTaskVDSCommand] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] START, SPMClearTaskVDSCommand( 
SPMTaskGuidBaseVDSCommandParameters:{storagePoolId='5da76866-7b7d-11eb-9913-00163e1f2643',
 ignoreFailoverLimit='false', taskId='ae2e80a4-d224-4fc3-a84b-859042811525'}), 
log id: 6225ae22
2021-08-03 15:51:33,596+03 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.HSMClearTaskVDSCommand] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] START, HSMClearTaskVDSCommand(HostName = 
ovirt2-7.vmmgmt-int.uoc.gr, 
HSMTaskGuidBaseVDSCommandParameters:{hostId='10599b78-5f45-48d2-bfe0-028f3dae69eb',
 taskId='ae2e80a4-d224-4fc3-a84b-859042811525'}), log id: 45b18a8a
2021-08-03 15:51:33,611+03 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.HSMClearTaskVDSCommand] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] FINISH, HSMClearTaskVDSCommand, return: 
, log id: 45b18a8a
2021-08-03 15:51:33,611+03 INFO  
[org.ovirt.engine.core.vdsbroker.irsbroker.SPMClearTaskVDSCommand] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] FINISH, SPMClearTaskVDSCommand, return: 
, log id: 6225ae22
2021-08-03 15:51:33,614+03 INFO  [org.ovirt.engine.core.bll.tasks.SPMAsyncTask] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] BaseAsyncTask::removeTaskFromDB: Removed 
task 'ae2e80a4-d224-4fc3-a84b-859042811525' from DataBase
2021-08-03 15:51:33,614+03 INFO  
[org.ovirt.engine.core.bll.tasks.CommandAsyncTask] 
(EE-ManagedThreadFactory-engine-Thread-1481337) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] CommandAsyncTask::HandleEndActionResult 
[within thread]: Removing CommandMultiAsyncTasks object for entity 
'baaa5254-261c-452a-84b4-0a8b397cdb62'
2021-08-03 15:51:33,839+03 INFO  
[org.ovirt.engine.core.bll.MergeCommandCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-95) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Merge command (jobId = 
c57fb3e5-da20-4838-8db3-31655ba76c1f) has completed for images 
'84c005da-cbec-4ace-8619-5a8e2ae5ea75'..'b43b7c33-5b53-4332-a2e0-f950debb919b'
2021-08-03 15:51:34,847+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-31) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Executing Live Merge command step 
'MERGE_STATUS'
2021-08-03 15:51:34,917+03 ERROR [org.ovirt.engine.core.bll.MergeStatusCommand] 
(EE-ManagedThreadFactory-commandCoordinator-Thread-2) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Failed to live merge. Top volume 
b43b7c33-5b53-4332-a2e0-f950debb919b is still in qemu chain 
[b43b7c33-5b53-4332-a2e0-f950debb919b, 84c005da-cbec-4ace-8619-5a8e2ae5ea75]
2021-08-03 15:51:35,866+03 INFO  
[org.ovirt.engine.core.bll.SerialChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-41) 
[b929fd4a-8ce7-408f-927d-ab0169879c4e] Command 'CopyImageGroupWithData' (id: 
'd1136344-2888-4d63-8fe1-b506426bc8aa') waiting on child command id: 
'b40aeec9-b7cf-4ee5-9683-54d98f4307d5' type:'CopyImageGroupVolumesData' to 
complete
2021-08-03 15:51:36,867+03 INFO  
[org.ovirt.engine.core.bll.SerialChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-50) 
[b929fd4a-8ce7-408f-927d-ab0169879c4e] Command 'CopyImageGroupVolumesData' (id: 
'b40aeec9-b7cf-4ee5-9683-54d98f4307d5') waiting on child command id: 
'f46d65cb-32d9-4269-982e-6e19331b8a27' type:'CopyData' to complete
2021-08-03 15:51:36,873+03 ERROR 
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-50) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command id: 
'87bc90c7-2aa5-4a1b-b58c-54296518658a failed child command status for step 
'MERGE_STATUS'
2021-08-03 15:51:36,873+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-50) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
id: '87bc90c7-2aa5-4a1b-b58c-54296518658a' child commands 
'[a7de75fe-e94c-4795-9310-2c8fc3d6d3fc, ec806ac6-929f-42d9-a86e-98d6a39a4718, 
6443529c-d753-48f6-8a9e-af1f9f09dfb5]' executions were completed, status 
'FAILED'
2021-08-03 15:51:37,982+03 ERROR 
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-22) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Merging of snapshot 
'1cd4985b-b0c0-40d6-bbde-54451e43bef6' images 
'84c005da-cbec-4ace-8619-5a8e2ae5ea75'..'b43b7c33-5b53-4332-a2e0-f950debb919b' 
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.
2021-08-03 15:51:37,985+03 ERROR 
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-22) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Ending command 
'org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand' with 
failure.
2021-08-03 15:51:39,014+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-23) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Executing Live Merge command step 
'REDUCE_IMAGE'
2021-08-03 15:51:39,029+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-23) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] No need to execute reduce image command, 
skipping its execution. Storage Type: 'FCP', Disk: 'anova.admin.uoc.gr_Disk2' 
Snapshot: 'anova.admin.uoc.gr-2021-08-03'
2021-08-03 15:51:39,034+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommandCallback]
 (EE-ManagedThreadFactory-engineScheduled-Thread-23) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshotSingleDiskLive' 
id: '80dc4609-b91f-4e93-bc12-7b2083933e5a' child commands 
'[18653ea6-166c-41a3-b335-84525871b9e6, 74c83880-581b-4774-ae51-8c4af0c92c53, 
92e92d8e-b099-47dd-ba8c-e3db907f9a62, baaa5254-261c-452a-84b4-0a8b397cdb62]' 
executions were completed, status 'SUCCEEDED'
2021-08-03 15:51:39,040+03 INFO  
[org.ovirt.engine.core.bll.ConcurrentChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-23) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshot' (id: 
'04e9d61e-28a2-4ab0-9bb7-5c805ee871e9') waiting on child command id: 
'80dc4609-b91f-4e93-bc12-7b2083933e5a' type:'RemoveSnapshotSingleDiskLive' to 
complete
2021-08-03 15:51:40,046+03 INFO  
[org.ovirt.engine.core.vdsbroker.irsbroker.GetImageInfoVDSCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-96) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] START, GetImageInfoVDSCommand( 
GetImageInfoVDSCommandParameters:{storagePoolId='5da76866-7b7d-11eb-9913-00163e1f2643',
 ignoreFailoverLimit='false', 
storageDomainId='96000ec9-e181-44eb-893f-e0a36e3a6775', 
imageGroupId='205a30a3-fc06-4ceb-8ef2-018f16d4ccbb', 
imageId='7611ebcf-5323-45ca-b16c-9302d0bdedc6'}), log id: 4c98e4db
2021-08-03 15:51:40,047+03 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetVolumeInfoVDSCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-96) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] START, GetVolumeInfoVDSCommand(HostName 
= ovirt2-7.vmmgmt-int.uoc.gr, 
GetVolumeInfoVDSCommandParameters:{hostId='10599b78-5f45-48d2-bfe0-028f3dae69eb',
 storagePoolId='5da76866-7b7d-11eb-9913-00163e1f2643', 
storageDomainId='96000ec9-e181-44eb-893f-e0a36e3a6775', 
imageGroupId='205a30a3-fc06-4ceb-8ef2-018f16d4ccbb', 
imageId='7611ebcf-5323-45ca-b16c-9302d0bdedc6'}), log id: 4aca5f83
2021-08-03 15:51:40,084+03 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetVolumeInfoVDSCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-96) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] FINISH, GetVolumeInfoVDSCommand, return: 
org.ovirt.engine.core.common.businessentities.storage.DiskImage@70097e6, log 
id: 4aca5f83
2021-08-03 15:51:40,084+03 INFO  
[org.ovirt.engine.core.vdsbroker.irsbroker.GetImageInfoVDSCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-96) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] FINISH, GetImageInfoVDSCommand, return: 
org.ovirt.engine.core.common.businessentities.storage.DiskImage@70097e6, log 
id: 4c98e4db
2021-08-03 15:51:40,283+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-96) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Successfully merged snapshot 
'1cd4985b-b0c0-40d6-bbde-54451e43bef6' images 
'17618ba1-4ab8-49eb-a991-fc3d602ced14'..'7611ebcf-5323-45ca-b16c-9302d0bdedc6'
2021-08-03 15:51:40,287+03 INFO  
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-96) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Ending command 
'org.ovirt.engine.core.bll.snapshots.RemoveSnapshotSingleDiskLiveCommand' 
successfully.
2021-08-03 15:51:40,296+03 INFO  
[org.ovirt.engine.core.bll.ConcurrentChildCommandsExecutionCallback] 
(EE-ManagedThreadFactory-engineScheduled-Thread-96) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Command 'RemoveSnapshot' id: 
'04e9d61e-28a2-4ab0-9bb7-5c805ee871e9' child commands 
'[87bc90c7-2aa5-4a1b-b58c-54296518658a, 80dc4609-b91f-4e93-bc12-7b2083933e5a]' 
executions were completed, status 'FAILED'
2021-08-03 15:51:41,322+03 ERROR 
[org.ovirt.engine.core.bll.snapshots.RemoveSnapshotCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-65) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] Ending command 
'org.ovirt.engine.core.bll.snapshots.RemoveSnapshotCommand' with failure.
2021-08-03 15:51:41,353+03 ERROR 
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] 
(EE-ManagedThreadFactory-engineScheduled-Thread-65) 
[3bf9345d-fab2-490f-ba44-6aa014bbb743] EVENT_ID: 
USER_REMOVE_SNAPSHOT_FINISHED_FAILURE(357), Failed to delete snapshot 
'anova.admin.uoc.gr-2021-08-03' for VM 'anova.admin.uoc.gr'.

Any help would be highly appreciated

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