[SOLVED] Backup fails: "backup register image failed" / "stream no longer needed"

[sur5r]

After several successful backups, these errors started to occur.

Datastore verification runs successfully. I couldn't find any addition log entries, so I'm a bit at loss what goes wrong here.

INFO: starting new backup job: vzdump 100 --notes-template 'Guest: {{guestname}}' --remove 0 --mode snapshot --storage pbs2.XXX.XXX --notification-mode auto --node XXX
INFO: Starting Backup of VM 100 (qemu)
INFO: Backup started at 2023-12-28 13:04:59
INFO: status = running
INFO: VM Name: XXX
INFO: include disk 'scsi0' 'lvm0:vm-100-disk-0' 64G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: skip unused drive 'local-zfs:vm-100-disk-0' (not included into backup)
INFO: snapshots found (not included into backup)
INFO: creating Proxmox Backup Server archive 'vm/100/2023-12-28T13:04:59Z'
INFO: enabling encryption
INFO: issuing guest-agent 'fs-freeze' command
INFO: issuing guest-agent 'fs-thaw' command
ERROR: VM 100 qmp command 'backup' failed - backup register image failed: command error: stream error received: stream no longer needed
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 100 failed - VM 100 qmp command 'backup' failed - backup register image failed: command error: stream error received: stream no longer needed
INFO: Failed at 2023-12-28 13:05:01
INFO: Backup job finished with errors
ERROR: could not notify via target `mail-to-root`: could not notify via endpoint(s): mail-to-root: At least one recipient has to be specified!
TASK ERROR: job errors

 

[wbk]

Hi sur5r,

Welcome to the forums!

I noticed:

INFO: include disk 'scsi0' 'lvm0:vm-100-disk-0' 64G
INFO: backup mode: snapshot INFO: ionice priority: 7
INFO: skip unused drive 'local-zfs:vm-100-disk-0' (not included into backup)
INFO: snapshots found (not included into backup)

these two vm-100-disk-0 are not the same disk, are they? One being on local-zfs and the other on lvm0.

I intended to compare your log with mine. Where did you find the log? I have the task history of successfully completed tasks, which lists some different details.

Searching /var/log/proxmox-backup/ I got API-access logs, and in task logs I only find APT updates around the times backups were running.

 

[sur5r]

Thanks for pointing me to /var/log/proxmox-backup.

The file /var/log/proxmox-backup/tasks/active was still pointing to a job that got aborted due to network interruption.

I rebooted the PBS and that file got emptied. I guess restarting proxmox-backup.service should have done the same thing.

I guess I never looked at the "Running Tasks" window on the PBS dashboard, so I can't tell whether it's possible to fix it from the WebUI.

Takeaway for me from this error message is: Check for stuck jobs on the PBS.

 

[wbk]

Great, glad to read you have solved!

 

[peterge]

Just for the record:
Our backup jobs to pbs did fail tonigh with a similar error message:

INFO: Starting Backup of VM 120 (qemu)
INFO: Backup started at 2024-04-09 02:00:12
INFO: status = running
INFO: VM Name: MiWeb
INFO: include disk 'scsi0' 'VM-Storage1:vm-120-disk-0' 200G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/120/2024-04-09T00:00:12Z'
INFO: issuing guest-agent 'fs-freeze' command
INFO: issuing guest-agent 'fs-thaw' command
ERROR: VM 120 qmp command 'backup' failed - backup register image failed: command error: stream error received: stream no longer needed
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 120 failed - VM 120 qmp command 'backup' failed - backup register image failed: command error: stream error received: stream no longer needed
INFO: Failed at 2024-04-09 02:00:13
INFO: Backup job finished with errors
TASK ERROR: job errors

After installing the latest updates on pbs and rebotting, the backups are working again, I did not check /var/log/proxmox-backup/tasks/active before executing reboot, but its empty afterwards.