Rebooted itself after months of uptime - anyone recognise these logs?

TrueNAS General
1

This morning I found my Scale install has rebooted itself. Here’s the connected logs - does anyone have a clue what might have happened or seen this before?

Mar 26 11:52:19 truenas systemd-journald[707]: /var/log/journal/91f580b012144888
b8f044689940de92/system.journal: Journal header limits reached or header out-of-
date, rotating.
Mar 28 18:10:18 truenas systemd-journald[707]: Data hash table of /var/log/journ
al/91f580b012144888b8f044689940de92/system.journal has a fill level at 75.0 (853
3 of 11377 items, 6553600 file size, 768 bytes per hash table item), suggesting 
rotation.
Mar 28 18:10:18 truenas systemd-journald[707]: /var/log/journal/91f580b012144888
b8f044689940de92/system.journal: Journal header limits reached or header out-of-
date, rotating.
Mar 30 08:33:32 truenas syslog-ng[2586]: syslog-ng starting up; version='3.38.1'
Mar 30 08:32:33 truenas kernel: Linux version 6.12.15-production+truenas (root@t
nsbuilds01.tn.ixsystems.net) (gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutil
s for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Wed Oct 29 14:40:06 UTC 2025
Mar 30 08:32:33 truenas kernel: Command line: BOOT_IMAGE=/ROOT/25.04.2.6@/boot/v
mlinuz-6.12.15-production+truenas root=ZFS=boot-pool/ROOT/25.04.2.6 ro libata.al
low_tpm=1 amd_iommu=on iommu=pt kvm_amd.npt=1 kvm_amd.avic=1 intel_iommu=on zfsf
orce=1 nvme_core.multipath=N

Thanks for looking!

2

Those logs honestly not say anything to me, except for the log gap from Mar 28 18:10:18 to Mar 30 08:33:32.
Do you have an UPS connected to the machine? Cannot just be a casual power issue?

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3

A UPS can also cause unexpected powerloss or reboots. If the unit does an occasional battery selftest and the battery is old, attached devices will lose power.

4

No UPS in use. Seemingly no power interruptions to my house either. Most odd!

5

This seems so odd that honestly, in your place, i wouldn’t start any hunt… unless another reboot occurs.

The only exception, if you are running on NO-ecc ram memory… maybe you can run a full cycle of memtest… just to be sure (and because @winnielinnie come here but not saying anything about it, a much odd fact than your reboots ahah :smile: )

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