Thanks for the report. It's probably related to https://github.com/vatesfr/xen-orchestra/pull/8085.

stephane-m-dev opened this pull request in vatesfr/xen-orchestra

closed fix(xen-orchestra/fs): nfs port #8085

@olivierlambert said in XCP-NG server crashes/reboots unexpectedly:

Check the /var/log/xen* stuff (on top of my head, @stormi probably knows that better than me)

I think this would be the output of xl dmesg.

Also, if the kern.log file is empty, this means that there were no messages for this day, but older messages may be visible in kern.log.1, kern.log.2.gz, etc.

Check the /var/log/xen* stuff (on top of my head, @stormi probably knows that better than me)

Have you took a look at Xen logs to see if there's anything? Also, anything in the IPMI? (logs)

I would run a memtest on that machine.