From owner-freebsd-questions@freebsd.org  Tue Apr 18 13:19:15 2017
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Subject: Re: 10.3-stable random server reboots - finding the reason
To: tech-lists <tech-lists@zyxst.net>, freebsd-stable@freebsd.org
References: <a7f787f8-486f-8221-ef8a-4535c4e1ae0c@zyxst.net>
Cc: freebsd-questions@freebsd.org
From: Bernt Hansson <bah@bananmonarki.se>
Message-ID: <f777456c-56f6-4432-3135-c085289c88ed@bananmonarki.se>
Date: Tue, 18 Apr 2017 14:21:53 +0200
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On 2017-04-18 13:59, tech-lists wrote:
> Hello stable@
>
> I have an up-to-date 10.3 server that is randomly rebooting, after being
> up for days. Previously it had been up for many months. The problem is,
> nothing seems to be left in the logs to indicate why it's doing this. I
> have all.log and console.log enabled.
>
> So, what I'm asking is, how can I capture its last gasp?
>
> many thanks,
That sounds very much like a hardware issue.
Capacitors, memory is what i would check.

Those errors won't be logged.