Sometimes backups to PBS fail with a timeout at 99% with a message " qmp command 'query-backup' failed - got timeout"

[alfe]

Hello,

I am using the latest PBS and Proxmox VE and with some backups I get a message qmp command 'query-backup' failed - got timeout at 99% of the backup:

134: 2020-09-28 07:36:20 INFO: 96% (6.5 GiB of 6.8 GiB) in 11m 59s, read: 8.5 MiB/s, write: 8.5 MiB/s 134: 2020-09-28 07:36:31 INFO: 97% (6.6 GiB of 6.8 GiB) in 12m 10s, read: 7.3 MiB/s, write: 7.3 MiB/s 134: 2020-09-28 07:36:42 INFO: 98% (6.6 GiB of 6.8 GiB) in 12m 21s, read: 5.8 MiB/s, write: 5.8 MiB/s 134: 2020-09-28 07:36:50 INFO: 99% (6.7 GiB of 6.8 GiB) in 12m 29s, read: 8.5 MiB/s, write: 8.5 MiB/s 134: 2020-09-28 07:46:56 ERROR: VM 134 qmp command 'query-backup' failed - got timeout 134: 2020-09-28 07:46:56 INFO: aborting backup job 134: 2020-09-28 07:53:29 ERROR: Backup of VM 134 failed - VM 134 qmp command 'query-backup' failed - got timeout

The problem only started recently with recent PBS versions. It doesn't happen all the time, several backups work without problems.

 

[t.lamprecht]

Hi.

Yes, this is known. We're working on a fix right now.

As a workaround, you can downgrade the backup server package on the PBS host to 0.8.16-1:

apt update
apt install proxmox-backup-server=0.8.16-1

 

[aychprox]

Encountered the same issue.
Does this required to downgrade on each PVE host as well?

 

[t.lamprecht]

Does this required to downgrade on each PVE host as well?

No.