Description of problem:
Live storage migration failed on 1 out of 5 disks due to quota null error during validation. This was a glance disk

Checked with the following code:
----------------------------------
ovirt-engine-4.2.0-0.5.master.el7.noarch
vdsm-4.20.8-53.gitc3edfc0.el7.centos.x86_64


How reproducible:


 
Checked with the following scenario:
----------------------------------
1. Create a new cloned vm from template with glance disk
2. Add 4 more disks 2 iscsi and 2 nfs disks
3. Start the vm and write data to all disks
4. Start Live storage migration of all the disks
5. All the non glance disks were migrated but the glance disk validation failed with VAR__ACTION__MOVE,VAR__TYPE__DISK,ACTION_TYPE_FAILED_QUOTA_NULL_NOT_ALLOWED
6. The same operation with 5 non glance disks worked fine

Actual results:
All the non glance disks were migrated but the glance disk validation failed with VAR__ACTION__MOVE,VAR__TYPE__DISK,ACTION_TYPE_FAILED_QUOTA_NULL_NOT_ALLOWED


Expected results:
All disks should have succeeded

Additional info:

Engine.log
--------------------
2017-11-30 12:29:33,881+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.GetQemuImageInfoVDSCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-94) [7b08071d] FINISH, GetQemuImageInfoVDSCommand, return: 
org.ovirt.engine.core.common.businessentities.storage.QemuImageInfo@4633822f, log id: f113656
2017-11-30 12:29:33,901+02 INFO  [org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-94) [] Lock freed to object 'EngineLock:{exclusiveLocks='[40
8ed615-1f42-4d9f-b51b-41d35b6b3a34=LIVE_STORAGE_MIGRATION]', sharedLocks=''}'
2017-11-30 12:29:33,962+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engineScheduled-Thread-94) [] EVENT_ID: USER_CREATE_SNAPSHOT_FINISHED_SUCCESS(68),
 Snapshot '1494711_Disk4 Auto-generated for Live Storage Migration' creation for VM '1494711' has been completed.
2017-11-30 12:29:34,117+02 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engine-Thread-22825) [71f70ae9] EVENT_ID: USER_MOVED_DISK_FINISHED_FAILURE(2,011),
 User admin@internal-authz have failed to move disk GlanceDisk-9c3e573 to domain block_3.
2017-11-30 12:29:34,174+02 WARN  [org.ovirt.engine.core.bll.storage.lsm.LiveMigrateDiskCommand] (EE-ManagedThreadFactory-engine-Thread-22825) [] Validation of action 'LiveMigrateDisk' failed for user admin@inter
nal-authz. Reasons: VAR__ACTION__MOVE,VAR__TYPE__DISK,ACTION_TYPE_FAILED_QUOTA_NULL_NOT_ALLOWED
2017-11-30 12:29:34,176+02 INFO  [org.ovirt.engine.core.bll.storage.lsm.LiveMigrateDiskCommand] (EE-ManagedThreadFactory-engine-Thread-22825) [] Lock freed to object 'EngineLock:{exclusiveLocks='[408ed615-1f42-4
d9f-b51b-41d35b6b3a34=LIVE_STORAGE_MIGRATION]', sharedLocks=''}'
2017-11-30 12:29:34,186+02 INFO  [org.ovirt.engine.core.bll.storage.disk.MoveDiskCommand] (EE-ManagedThreadFactory-engine-Thread-22825) [] Lock freed to object 'EngineLock:{exclusiveLocks='[cf725330-f4a0-4805-95
ac-37a86f81c226=DISK]', sharedLocks=''}'
2017-11-30 12:29:35,349+02 INFO  [org.ovirt.engine.core.bll.storage.lsm.CreateImagePlaceholderCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-85) [7b08071d] Running command: CreateImagePlaceholderComman
d internal: true.
2017-11-30 12:29:35,378+02 INFO  [org.ovirt.engine.core.vdsbroker.irsbroker.CloneImageGroupStructureVDSCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-85) [7b08071d] START, CloneImageGroupStructureVDSCo
mmand( TargetDomainImageGroupVDSCommandParameters:{storagePoolId='554f5132-0233-44df-8266-1827c26a2731', ignoreFailoverLimit='false', storageDomainId='3af1fd42-ee7f-4ced-bd04-14a695abf210', imageGroupId='4d438e1
8-747b-42fa-8db2-87b152775a2f', dstDomainId='b71445d9-7f47-4706-958f-16b5c7c068f6'}), log id: 4d9521c1



Only 4 merges performed:
-------------------
2017-11-30 12:31:16,119+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MergeVDSCommand] (EE-ManagedThreadFactory-commandCoordinator-Thread-1) [4ad787a5] START, MergeVDSCommand(HostName = green-vdsb.qa.lab.tlv.redhat.com, MergeVDSCommandParameters:{hostId='33578954-26ec-4a07-94ec-e94fbe09b8b3', vmId='408ed615-1f42-4d9f-b51b-41d35b6b3a34', storagePoolId='554f5132-0233-44df-8266-1827c26a2731', storageDomainId='b71445d9-7f47-4706-958f-16b5c7c068f6', imageGroupId='b55b9cf5-e811-4d2c-ba7b-8fde1a5a71c1', imageId='c003dea2-1ba0-4993-8096-452fd9b5d263', baseImageId='c512318b-1ff3-473f-a88a-502976488bac', topImageId='c003dea2-1ba0-4993-8096-452fd9b5d263', bandwidth='0'}), log id: 48e65f88
2017-11-30 12:31:18,472+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MergeVDSCommand] (EE-ManagedThreadFactory-commandCoordinator-Thread-1) [4ad787a5] FINISH, MergeVDSCommand, return: 396b314c-69cb-4c1d-9cb0-33f38b1d8dc7, log id: 48e65f88
2017-11-30 12:32:16,145+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MergeVDSCommand] (EE-ManagedThreadFactory-commandCoordinator-Thread-5) [744c08f2] START, MergeVDSCommand(HostName = green-vdsb.qa.lab.tlv.redhat.com, MergeVDSCommandParameters:{hostId='33578954-26ec-4a07-94ec-e94fbe09b8b3', vmId='408ed615-1f42-4d9f-b51b-41d35b6b3a34', storagePoolId='554f5132-0233-44df-8266-1827c26a2731', storageDomainId='8820b01d-dc2a-4994-93dd-4f0d2c92400a', imageGroupId='5f760559-4d88-449f-8abb-8c71f2abc429', imageId='122c9ebd-e821-4f71-9488-bf8b1175341e', baseImageId='d55c7ac9-a2de-49f4-8a50-44a6c4d59221', topImageId='122c9ebd-e821-4f71-9488-bf8b1175341e', bandwidth='0'}), log id: 773475c2
2017-11-30 12:32:16,861+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MergeVDSCommand] (EE-ManagedThreadFactory-commandCoordinator-Thread-5) [744c08f2] FINISH, MergeVDSCommand, return: 78b59cce-8fc5-421f-9fb9-3d12360f8894, log id: 773475c2
2017-11-30 12:32:21,144+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MergeVDSCommand] (EE-ManagedThreadFactory-commandCoordinator-Thread-7) [7b08071d] START, MergeVDSCommand(HostName = green-vdsb.qa.lab.tlv.redhat.com, MergeVDSCommandParameters:{hostId='33578954-26ec-4a07-94ec-e94fbe09b8b3', vmId='408ed615-1f42-4d9f-b51b-41d35b6b3a34', storagePoolId='554f5132-0233-44df-8266-1827c26a2731', storageDomainId='b71445d9-7f47-4706-958f-16b5c7c068f6', imageGroupId='4d438e18-747b-42fa-8db2-87b152775a2f', imageId='4c3d63c6-9f57-44a4-8712-2470ce0289ec', baseImageId='49d21ec9-2f6e-4193-adcd-e22127b9be0a', topImageId='4c3d63c6-9f57-44a4-8712-2470ce0289ec', bandwidth='0'}), log id: a5d0cad
2017-11-30 12:32:21,678+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MergeVDSCommand] (EE-ManagedThreadFactory-commandCoordinator-Thread-7) [7b08071d] FINISH, MergeVDSCommand, return: 37671372-e551-4df8-84d1-3bacd80410d8, log id: a5d0cad
2017-11-30 12:33:10,195+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MergeVDSCommand] (EE-ManagedThreadFactory-commandCoordinator-Thread-8) [57061e3e] START, MergeVDSCommand(HostName = green-vdsb.qa.lab.tlv.redhat.com, MergeVDSCommandParameters:{hostId='33578954-26ec-4a07-94ec-e94fbe09b8b3', vmId='408ed615-1f42-4d9f-b51b-41d35b6b3a34', storagePoolId='554f5132-0233-44df-8266-1827c26a2731', storageDomainId='8820b01d-dc2a-4994-93dd-4f0d2c92400a', imageGroupId='bee64d5d-4f30-401c-af5d-ba5fdd7b6347', imageId='c8fec057-8ba8-470b-b4f9-e3df1ebe2104', baseImageId='ddbc6075-0984-4b55-a5ff-083e6eb5643d', topImageId='c8fec057-8ba8-470b-b4f9-e3df1ebe2104', bandwidth='0'}), log id: 5f48b00a
2017-11-30 12:33:10,948+02 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MergeVDSCommand] (EE-ManagedThreadFactory-commandCoordinator-Thread-8) [57061e3e] FINISH, MergeVDSCommand, return: 31633f93-195f-436c-9370-058d55216624, log id: 5f48b00a


Only 4 snapshots created and deleted:
--------------------------------------
2017-11-30 12:28:01,902+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engine-Thread-22825) [57061e3e] EVENT_ID: USER_CREATE_SNAPSHOT(45), Snapshot '1494711_Disk1 Auto-generated for Live Storage Migration' creation for VM '1494711' was initiated by admin@internal-authz.
2017-11-30 12:28:20,911+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engine-Thread-22825) [744c08f2] EVENT_ID: USER_CREATE_SNAPSHOT(45), Snapshot '1494711_Disk2 Auto-generated for Live Storage Migration' creation for VM '1494711' was initiated by admin@internal-authz.
2017-11-30 12:28:53,202+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engine-Thread-22825) [4ad787a5] EVENT_ID: USER_CREATE_SNAPSHOT(45), Snapshot '1494711_Disk3 Auto-generated for Live Storage Migration' creation for VM '1494711' was initiated by admin@internal-authz.
2017-11-30 12:29:13,503+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engine-Thread-22825) [7b08071d] EVENT_ID: USER_CREATE_SNAPSHOT(45), Snapshot '1494711_Disk4 Auto-generated for Live Storage Migration' creation for VM '1494711' was initiated by admin@internal-authz.
2017-11-30 12:31:14,959+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engineScheduled-Thread-44) [] EVENT_ID: USER_REMOVE_SNAPSHOT(342), Snapshot '1494711_Disk3 Auto-generated for Live Storage Migration' deletion for VM '1494711' was initiated by admin@internal-authz.
2017-11-30 12:32:13,132+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engineScheduled-Thread-93) [] EVENT_ID: USER_REMOVE_SNAPSHOT(342), Snapshot '1494711_Disk2 Auto-generated for Live Storage Migration' deletion for VM '1494711' was initiated by admin@internal-authz.
2017-11-30 12:32:17,841+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engineScheduled-Thread-12) [] EVENT_ID: USER_REMOVE_SNAPSHOT(342), Snapshot '1494711_Disk4 Auto-generated for Live Storage Migration' deletion for VM '1494711' was initiated by admin@internal-authz.
2017-11-30 12:33:07,999+02 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engineScheduled-Thread-61) [] EVENT_ID: USER_REMOVE_SNAPSHOT(342), Snapshot '1494711_Disk1 Auto-generated for Live Storage Migration' deletion for VM '1494711' was initiated by admin@internal-authz.