Hi, we're experimenting with Cinder/Ceph Storage on oVirt 4.1.3. When we tried to snapshot a VM (2 disks on Cinder storage domain) the task never finished and now seems to be in an uninterruptible loop. We tried to stop it in various (brute force) ways, but the below messages (one of the disks as an example) are cluttering engine.log every 10 seconds. We tried the following: - deleting the VM - restarting ovirt-engine service - vdsClient -s 0 getAllTasksStatuses on SPM host (no result) - restarting vdsmd service on SPM host - /usr/share/ovirt-engine/setup/dbutils/taskcleaner.sh -u engine -d engine -c c841c979-70ea-4e06-b9c4-9c5ce014d76d None of this helped. How do we get rid of this failed transaction? thx matthias 2017-08-21 16:40:44,798+02 INFO [org.ovirt.engine.core.utils.transaction.TransactionSupport] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] transaction rolled back 2017-08-21 16:40:44,799+02 ERROR [org.ovirt.engine.core.bll.job.ExecutionHandler] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] Exception: org.springframework.dao.DataIntegrityViolationException: CallableStatementCallback; SQL [{call insertstep(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)}]; ERROR: insert or update on table "step" violates foreign key constraint "fk_step_job" 2017-08-21 16:40:44,805+02 ERROR [org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] Ending command 'org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand' with failure. 2017-08-21 16:40:44,807+02 WARN [org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] No snapshot was created for VM 'c0235316-81c4-48be-9521-b86b338c7d20' which is in LOCKED status 2017-08-21 16:40:44,810+02 INFO [org.ovirt.engine.core.utils.transaction.TransactionSupport] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] transaction rolled back 2017-08-21 16:40:44,810+02 WARN [org.ovirt.engine.core.bll.lock.InMemoryLockManager] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] Trying to release exclusive lock which does not exist, lock key: 'c0235316-81c4-48be-9521-b86b338c7d20VM' 2017-08-21 16:40:44,810+02 INFO [org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] Lock freed to object 'EngineLock:{exclusiveLocks='[c0235316-81c4-48be-9521-b86b338c7d20=VM]', sharedLocks=''}' 2017-08-21 16:40:44,829+02 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] EVENT_ID: USER_CREATE_SNAPSHOT_FINISHED_FAILURE(69), Correlation ID: 080af640-bac3-4990-8bf4-6829551b538d, Job ID: a3be8af1-8d33-4d35-9672-215ac7c9959f, Call Stack: null, Custom Event ID: -1, Message: Failed to complete snapshot 'test' creation for VM '<UNKNOWN>'. 2017-08-21 16:40:44,829+02 ERROR [org.ovirt.engine.core.bll.tasks.CommandCallbacksPoller] (DefaultQuartzScheduler7) [080af640-bac3-4990-8bf4-6829551b538d] Failed invoking callback end method 'onFailed' for command 'c841c979-70ea-4e06-b9c4-9c5ce014d76d' with exception 'null', the callback is marked for end method retries