Proxmox backup stop working


Renowned Member
Dec 8, 2009
proxmox backup was working on active cluster, do daily backups for nodes
today, Without any change on cluster, backup stop working on all nodes
the example log:
INFO: starting new backup job: vzdump --node serv04 --all 1 --mode snapshot --mailnotification failure --storage ILPBS --quiet 1
INFO: Starting Backup of VM 146 (qemu)
INFO: Backup started at 2021-11-16 23:30:02
INFO: status = running
INFO: VM Name: serverdomain352.tld
INFO: include disk 'scsi0' 'zfs:vm-146-disk-0' 200G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/146/2021-11-16T21:30:02Z'
ERROR: VM 146 qmp command 'backup' failed - backup register image failed: command error: unable to get shared lock - EBADF: Bad file number
INFO: aborting backup job
INFO: resuming VM again


Please check the datastore on the backup server. Seems there is a problem with the lock file. What is the output of:

Hi dietmar
thanks for your response!
upgrade the pbs to latest version solved the issue



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