I’ve been working through problems with the stability of TrueNAS Scale for months. At this point, I’m not looking for advice on trial-and-error suggestions about hardware. (I’m using a number of systems in a lab and seeing similar results)
My question. I’m see TrueNAS Scale (ElectricEel-24.10.2.1) periodically reboot with no obvious reason. Can someone please provide advice on where to look in the Kernel Logs? I’ve enabled logging but nothing is jumping out about the rebooting.
Thanks
In syslog I’m seeing the following at the time of restarting (I’ve obscured the actually host names):
Apr 14 08:23:28 evergreen dockerd[7554]: time=“2025-04-14T08:23:28.854944429-05:00” level=error msg=“[resolver] failed to query external DNS server” client-addr=“udp:172.16.1.2:58336” dns-server=“udp:192.168.102.1:53” error=“read udp 172.16.1.2:58336->192.168.102.1:53: i/o timeout” question=“;stun.syncthing.net.hxxxxx.net.\tIN\t A”
Apr 14 08:23:32 evergreen dockerd[7554]: time=“2025-04-14T08:23:32.889657258-05:00” level=error msg=“[resolver] failed to query external DNS server” client-addr=“udp:172.16.1.2:42149” dns-server=“udp:192.168.102.1:53” error=“read udp 172.16.1.2:42149->192.168.102.1:53: i/o timeout” question=“;stun.syncthing.net.tail8xxxxx.ts.net.\tIN\t AAAA”
Apr 14 08:23:32 evergreen dockerd[7554]: time=“2025-04-14T08:23:32.889644232-05:00” level=error msg=“[resolver] failed to query external DNS server” client-addr=“udp:172.16.1.2:49981” dns-server=“udp:192.168.102.1:53” error=“read udp 172.16.1.2:49981->192.168.102.1:53: i/o timeout” question=“;stun.syncthing.net.tail8xxxxx.ts.net.\tIN\t A”
Apr 14 08:28:36 evergreen dockerd[7554]: time=“2025-04-14T08:28:36.987361178-05:00” level=error msg=“[resolver] failed to query external DNS server” client-addr=“udp:172.16.1.2:53115” dns-server=“udp:192.168.102.1:53” error=“read udp 172.16.1.2:53115->192.168.102.1:53: i/o timeout” question=“;stun.syncthing.net.hxxxxx.net.\tIN\t A”
Apr 14 08:28:41 evergreen dockerd[7554]: time=“2025-04-14T08:28:41.012623917-05:00” level=error msg=“[resolver] failed to query external DNS server” client-addr=“udp:172.16.1.2:50813” dns-server=“udp:192.168.102.1:53” error=“read udp 172.16.1.2:50813->192.168.102.1:53: i/o timeout” question=“;stun.syncthing.net.tail8xxxxx.ts.net.\tIN\t A”
Apr 14 08:28:41 evergreen dockerd[7554]: time=“2025-04-14T08:28:41.012649667-05:00” level=error msg=“[resolver] failed to query external DNS server” client-addr=“udp:172.16.1.2:49518” dns-server=“udp:192.168.102.1:53” error=“read udp 172.16.1.2:49518->192.168.102.1:53: i/o timeout” question=“;stun.syncthing.net.tail8xxxxx.ts.net.\tIN\t AAAA”
Apr 14 08:30:09 evergreen systemd[1]: Starting sysstat-collect.service - system activity accounting tool…
Apr 14 08:30:09 evergreen systemd[1]: sysstat-collect.service: Deactivated successfully.
Apr 14 08:30:09 evergreen systemd[1]: Finished sysstat-collect.service - system activity accounting tool.
Apr 14 08:30:24 evergreen nscd[3003985]: 3003985 monitoring file /etc/hosts (1)
Apr 14 08:30:24 evergreen nscd[3003985]: 3003985 monitoring directory /etc (2)
Apr 14 08:30:24 evergreen nscd[3003985]: 3003985 monitoring file /etc/resolv.conf (3)
Apr 14 08:30:24 evergreen nscd[3003985]: 3003985 monitoring directory /etc (2)
Apr 14 08:30:24 evergreen nscd[3003985]: 3003985 monitoring file /etc/nsswitch.conf (4)
Apr 14 08:30:24 evergreen nscd[3003985]: 3003985 monitoring directory /etc (2)
I can’t imagine why failed DNS queries would cause a problem and I can’t imagine how an application could cause a reboot. But so far, this is all I’m seeing.
I’m also curious why syncthing is generating this error - but I’m focusing on the system reboot in this thread…
Any suggestions of other logs to review?
