Hi,
Since upgrading to PBS 4.0 backups randomly fail with a message like this:
INFO: issuing guest-agent 'fs-freeze' command
INFO: issuing guest-agent 'fs-thaw' command
ERROR: VM 129 qmp command 'backup' failed - got timeout
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 129 failed - VM 129 qmp command 'backup' failed - got timeout
On another occasion I got the following error:
INFO: 23% (14.1 GiB of 61.4 GiB) in 2m 55s, read: 38.5 MiB/s, write: 38.5 MiB/s
INFO: 24% (15.1 GiB of 61.4 GiB) in 3m 24s, read: 36.1 MiB/s, write: 35.7 MiB/s
INFO: 24% (15.1 GiB of 61.4 GiB) in 3m 25s, read: 0 B/s, write: 0 B/s
ERROR: backup write data failed: command error: write_data upload error: pipelined request failed: stream closed because of a broken pipe
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 124 failed - backup write data failed: command error: write_data upload error: pipelined request failed: stream closed because of a broken pipe
INFO: Failed at 2025-08-25 21:03:40
If I repeat it manually, it seems to work.
My versions are as the following:
- PVE 8.4.11
- Backup Server 4.0.14
The cluster used Ceph 17 as storage, I upgraded to Ceph 19 - but this made no difference.
How can I solve this problem?
Best Regards,
Hermann
Since upgrading to PBS 4.0 backups randomly fail with a message like this:
INFO: issuing guest-agent 'fs-freeze' command
INFO: issuing guest-agent 'fs-thaw' command
ERROR: VM 129 qmp command 'backup' failed - got timeout
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 129 failed - VM 129 qmp command 'backup' failed - got timeout
On another occasion I got the following error:
INFO: 23% (14.1 GiB of 61.4 GiB) in 2m 55s, read: 38.5 MiB/s, write: 38.5 MiB/s
INFO: 24% (15.1 GiB of 61.4 GiB) in 3m 24s, read: 36.1 MiB/s, write: 35.7 MiB/s
INFO: 24% (15.1 GiB of 61.4 GiB) in 3m 25s, read: 0 B/s, write: 0 B/s
ERROR: backup write data failed: command error: write_data upload error: pipelined request failed: stream closed because of a broken pipe
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 124 failed - backup write data failed: command error: write_data upload error: pipelined request failed: stream closed because of a broken pipe
INFO: Failed at 2025-08-25 21:03:40
If I repeat it manually, it seems to work.
My versions are as the following:
- PVE 8.4.11
- Backup Server 4.0.14
The cluster used Ceph 17 as storage, I upgraded to Ceph 19 - but this made no difference.
How can I solve this problem?
Best Regards,
Hermann
