It seems that the import of the storage domain failed since it was inaccessible:
2016-12-28 07:06:25,406 ERROR [org.ovirt.engine.core.bll.storage.domain.GetExistingStorageDomainListQuery] (org.ovirt.thread.pool-6-thread-46) [] Exception: org.ovirt.engine.core.common.errors.EngineException: EngineException: org.ovirt.engine.core.vdsbroker.vdsbroker.VDSErrorException: VDSGenericException: VDSErrorException: Failed to HSMGetStorageDomainInfoVDS, error = Domain is either partially accessible or entirely inaccessible: (u'247b250c-ccd3-4056-853f-f03a05369da9',), code = 379 (Failed with error StorageDomainAccessError and code 379)
....
2016-12-28 07:06:25,413 ERROR [org.ovirt.engine.core.bll.storage.domain.ImportHostedEngineStorageDomainCommand] (org.ovirt.thread.pool-6-thread-46) [] Failed query for all Storage Domains. The import command can not proceed without this info
Once that happened the command was logged in the db as failed, and every engine restart the engine tries to run it again (compensate mechanism).
However, since the import storage domain command is not "compensatable" this fails and the domain remains locked.
2016-12-28 07:09:02,643 ERROR [org.ovirt.engine.core.bll.CommandsFactory] (ServerService Thread Pool -- 56) [] CommandsFactory : Failed to get type information using reflection for Class 'org.ovirt.engine.core.bll.storage.domain.ImportHostedEngineStorageDomainCommand', Command Id '2ab30734-bbe4-4f50-897f-f1b393a31852': org.ovirt.engine.core.bll.storage.domain.ImportHostedEngineStorageDomainCommand.<init>(org.ovirt.engine.core.compat.Guid)
2016-12-28 07:09:02,643 ERROR [org.ovirt.engine.core.bll.CommandsFactory] (ServerService Thread Pool -- 56) [] Exception: java.lang.NoSuchMethodException: org.ovirt.engine.core.bll.storage.domain.ImportHostedEngineStorageDomainCommand.<init>(org.ovirt.engine.core.compat.Guid)
....
2016-12-28 07:09:02,646 ERROR [org.ovirt.engine.core.bll.Backend] (ServerService Thread Pool -- 56) [] Failed to run compensation on startup for Command 'org.ovirt.engine.core.bll.storage.domain.ImportHostedEngineStorageDomainCommand', Command Id '2ab30734-bbe4-4f50-897f-f1b393a31852'
I would suggest:
1. Verify the you can access the storage domain.
2. If you can access the domain, you can try removing it from the ui (I think the destroy option should be available).
After the removal the engine will try to reimport it, and hopefully will succeed.
Removing the storage domain may cause the engine and the ha-agent to restart.
Jenny