[SOLVED] Proxmox 6.4-13 - replication stuck at "freeze guest filesystem" leaving the LXC container locked

[albans]

Hi,

I've 2 fresh installations of Proxmox 6.4-13 with ZFS, working as a cluster, let's call them host1 & host2.

1. one of the LXC container is being replicated every 2 hrs from host2 to host1 without any issue
2. another LXC container is being replicated every 2 hrs from host1 to host2 with issues
   • the LXC container gets locked and can't be stopped or shutdown anymore
   • the replication task log is stuck on the line "freeze guest filesystem", and the replication is still "in progress" according to Proxmox web UI
   • after 2hours, I had to physically reboot the proxmox machine as it could not even finalize a soft reboot

Any idea what could be the cause of such problem? Any spcecific logs I shall check?
I've looked at syslog, lxc-monitord.log, 105-0 (replication log), daemon.log, kern.log... nothing special at the time the replication task got stuck at "freeze guest filesystem".

Thank you.

 

[albans]

Alright, replying to myself: I found out the reason for the "freeze guest filesystem" getting stuck:
- the replication of the LXC container from host1 to host2 got stuck AFTER I mounted a folder with s3fs (!) within the LXC container (using the FUSE option on the LXC container config at proxmox UI level)

I've now unmounted the folder and everything has been stable for half a day.