Since I upgraded to 4.0.6-3 I've been having problems with the UI
When I login the dash board presents a bunch of Operation Canceled dialogs,
! Operation canceled
Error while executing query: null
! Operation canceled
Error while executing action: A Request to the Server failed: java.lang.reflect.InvocationTargetException
The only error I see in engine.log is
2016-12-04 11:34:07,945 INFO [org.ovirt.engine.docs.utils.servlet.ContextSensitiveHelpMappingServlet] (default task-1) [] Context-sensitive help is not installed. Manual directory doesn't exist: /usr/share/ovirt-engine/manual
Eventually after closing the error dialogs the dash board is displayed.
Most of the UI tabs then work normally, however 'Virtual Machines' tab doesn't display any information, just the progress 'dots' on the first line, it then cycles through the null query error dialogs.
This error also appeared in the log while I was writing this:
2016-12-04 11:40:09,276 INFO [org.ovirt.engine.core.bll.EngineBackupAwarenessManager] (DefaultQuartzScheduler5) [7b442cfe] Backup check started.
2016-12-04 11:40:09,278 INFO [org.ovirt.engine.core.bll.EngineBackupAwarenessManager] (DefaultQuartzScheduler5) [7b442cfe] Backup check completed.
2016-12-04 11:40:09,772 INFO [org.ovirt.engine.core.bll.storage.ovfstore.OvfDataUpdater] (DefaultQuartzScheduler3) [2701e060] Attempting to update VMs/Templates Ovf.
2016-12-04 11:40:09,774 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Before acquiring and wait lock 'EngineLock:{exclusiveLocks='[57fc8739-0039-00c7-0322-0000000001e5=<OVF_UPDATE, ACTION_TYPE_FAILED_OBJECT_LOCKED>]', sharedLocks='null'}'
2016-12-04 11:40:09,774 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Lock-wait acquired to object 'EngineLock:{exclusiveLocks='[57fc8739-0039-00c7-0322-0000000001e5=<OVF_UPDATE, ACTION_TYPE_FAILED_OBJECT_LOCKED>]', sharedLocks='null'}'
2016-12-04 11:40:09,775 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Running command: ProcessOvfUpdateForStoragePoolCommand internal: true. Entities affected : ID: 57fc8739-0039-00c7-0322-0000000001e5 Type: StoragePool
2016-12-04 11:40:09,781 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Attempting to update VM OVFs in Data Center 'Default'
2016-12-04 11:40:09,788 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Successfully updated VM OVFs in Data Center 'Default'
2016-12-04 11:40:09,789 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Attempting to update template OVFs in Data Center 'Default'
2016-12-04 11:40:09,790 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Successfully updated templates OVFs in Data Center 'Default'
2016-12-04 11:40:09,790 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Attempting to remove unneeded template/vm OVFs in Data Center 'Default'
2016-12-04 11:40:09,793 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Successfully removed unneeded template/vm OVFs in Data Center 'Default'
2016-12-04 11:40:09,793 INFO [org.ovirt.engine.core.bll.storage.ovfstore.ProcessOvfUpdateForStoragePoolCommand] (DefaultQuartzScheduler3) [5358e209] Lock freed to object 'EngineLock:{exclusiveLocks='[57fc8739-0039-00c7-0322-0000000001e5=<OVF_UPDATE, ACTION_TYPE_FAILED_OBJECT_LOCKED>]', sharedLocks='null'}'
If I restart the ovirt-engine process, the UI works for a while before the Operation Canceled dialogs start appearing again.