Backup isn't working (stops at upload directory step)

[MH_MUC]

Hi.I just installed PBS in a test enviroment.

I installed it on top of a PVE installation and added a dataset on top of /rpool/data.
When I try to backup a basis debian CT I get the following output.
A local backup is just 200MB so this shouldn't be stuck at this point for over 30min.

INFO: starting new backup job: vzdump 100 --remove 0 --storage testserver --mode snapshot --node cluster1
INFO: Starting Backup of VM 100 (lxc)
INFO: Backup started at 2021-03-11 16:16:56
INFO: status = stopped
INFO: backup mode: stop
INFO: ionice priority: 7
INFO: CT Name: CT100
INFO: including mount point rootfs ('/') in backup
INFO: creating Proxmox Backup Server archive 'ct/100/2021-03-11T15:16:56Z'
INFO: run: lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- /usr/bin/proxmox-backup-client backup --crypt-mode=none pct.conf:/var/tmp/vzdumptmp3847_100/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid --backup-type ct --backup-id 100 --backup-time 1615475816 --repository root@pam@192.168.1.193:test
INFO: Starting backup: ct/100/2021-03-11T15:16:56Z
INFO: Client name: cluster1
INFO: Starting backup protocol: Thu Mar 11 16:16:56 2021
INFO: No previous manifest available.
INFO: Upload config file '/var/tmp/vzdumptmp3847_100/etc/vzdump/pct.conf' to 'root@pam@192.168.1.193:8007:test' as pct.conf.blob
INFO: Upload directory '/mnt/vzsnap0' to 'root@pam@192.168.1.193:8007:test' as root.pxar.didx


Any idea?
Thank you

EDIT:
syslog shows
Mar 11 17:57:04 cluster2 proxmox-backup-proxy[1313]: created new dynamic index 1 ("ct/100/2021-03-11T16:57:04Z/catalog.pcat1.didx")
Mar 11 17:57:04 cluster2 proxmox-backup-proxy[1313]: created new dynamic index 2 ("ct/100/2021-03-11T16:57:04Z/root.pxar.didx")
Mar 11 18:06:50 cluster2 proxmox-backup-proxy[1313]: error during snapshot file listing: 'unable to load blob '"/rpool/data/backupdataset/ct/100/2021-03-11T16:57:04Z/index.json.blob"' - No such file or directory (os error 2)'

EDIT2:
I have the same problem when trying to upload to the TUXIS-Server, which is using 1.0.8.
My server is running stable.

 

[subjectx]

Got to the same error, cant find anything in syslog like you did.

Backup job is part of multiple instance's backup, did like 5 or 6 VMs or LXCs successfully, got stuck on 7th VM..

/mnt/vzsnap0 is empty directory.

EDIT1:
I stopped task of backuping up 12 instances and ran it again.
Now it stops at first instance with same error..

 

[MH_MUC]

What is really interesting: A few days later it just worked...
(The syslog-entry was on the target pbs server)

 

[subjectx]

Hmm, I guess I just had to wait ALOT of time to task to finish. It did finish eventually on its own, but it took like and hour to pass this step..

 

[andreasc]

Hi together,

I have this issue only if I using IPv6 in combination with DNS. When I have records in the /etc/hosts with IPv4 only its working.
Example:
192.168.1.2 pve.local.domain pve
fd11:192:168:1::2 pve.local.domain pve
192.168.1.3 pbs.local.domain pbs

DNS Resolution for both names gives IPv4 and IPv6 addresses back. With this /etc/hosts settings it es working.

So if you are using IPv6 that cloud be a workaround for you.

BR Andreas