On Tue, Aug 22, 2017 at 1:08 PM, Matthias Leopold <matthias.leopold@meduniwien.ac.at> wrote:

Am 2017-08-22 um 09:33 schrieb Maor Lipchuk:

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On Mon, Aug 21, 2017 at 6:12 PM, Matthias Leopold <matthias.leopold@meduniwien.ac.at> wrote:

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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

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Hi Matthias,

Can you please attach the full engine log contains the first error occurred so we can trace its origin and fix it? Does it reproduced constantly?

The engine does not use VDSM tasks to manage Cinder, the engine use Cinder as an external provider using the COCO infrastructure for async tasks. The COCO tasks are managed in the database using the command_entities table, basically if you will remove all references of the command id from the command_entities and restart engine you should not see it any more.

Regards, Maor

Hi Maor,

thanks very much for replying. First i tried to clean the command_entities table plus restarting engine as you suggested. This didn't work entirely, these two entries

Can you please try first to stop the engine and only then clean the command_entities.

engine=# select command_id, command_type, root_command_id, status from command_entities; command_id | command_type | root_command_id | status --------------------------------------+--------------+--------------------------------------+-------- c841c979-70ea-4e06-b9c4-9c5ce014d76d | 206 | c841c979-70ea-4e06-b9c4-9c5ce014d76d | FAILED 65fa094e-1609-47ea-bf0d-611e3d5b9358 | 206 | 65fa094e-1609-47ea-bf0d-611e3d5b9358 | FAILED

keep appearing and still cause messages in engine.log like

2017-08-22 11:54:57,109+02 WARN [org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand] (DefaultQuartzScheduler8) [080af640-bac3-4990-8bf4-6829551b538d] No snapshot was created for VM 'c0235316-81c4-48be-9521-b86b338c7d20' which is in LOCKED status 2017-08-22 11:54:57,112+02 INFO [org.ovirt.engine.core.utils.transaction.TransactionSupport] (DefaultQuartzScheduler8) [080af640-bac3-4990-8bf4-6829551b538d] transaction rolled back 2017-08-22 11:54:57,112+02 WARN [org.ovirt.engine.core.bll.lock.InMemoryLockManager] (DefaultQuartzScheduler8) [080af640-bac3-4990-8bf4-6829551b538d] Trying to release exclusive lock which does not exist, lock key: 'c0235316-81c4-48be-9521-b86b338c7d20VM' 2017-08-22 11:54:57,112+02 INFO [org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand] (DefaultQuartzScheduler8) [080af640-bac3-4990-8bf4-6829551b538d] Lock freed to object 'EngineLock:{exclusiveLocks='[c0235316-81c4-48be-9521-b86b338c7d20=VM]', sharedLocks=''}' 2017-08-22 11:54:57,131+02 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (DefaultQuartzScheduler8) [080af640-bac3-4990-8bf4-6829551b538d] EVENT_ID: USER_CREATE_SNAPSHOT_FINISHED_FAILURE(69), Correlation ID: 080af640-bac3-4990-8bf4-6829551b538d, Call Stack: null, Custom Event ID: -1, Message: Failed to complete snapshot 'test' creation for VM '<UNKNOWN>'. 2017-08-22 11:54:57,132+02 ERROR [org.ovirt.engine.core.bll.tasks.CommandCallbacksPoller] (DefaultQuartzScheduler8) [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 2017-08-22 11:54:57,138+02 ERROR [org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand] (DefaultQuartzScheduler8) [54caec87-ba59-4e9f-acf3-7fb5d94658e4] Ending command 'org.ovirt.engine.core.bll.snapshots.CreateAllSnapshotsFromVmCommand' with failure.

The SQL error messages like

ERROR: insert or update on table "step" violates foreign key constraint "fk_step_job"

are gone now. Please give me a hint how to get rid of these tasks.

To trace the original error i'm attaching a minute of engine logs when the error first occurred (i hope this works when sending to the list). We have not tried to reproduce it yet, but we are planning to test cinder/ceph storage more extensively, so we'll be looking at this again. At first i would feel a lot better when i could clean up the last error completely.

Thanks a lot again Best Regards Matthias

Thanks for the logs. If you can add the full engine log maybe I can also look at the reason of the consistent failing.