[CentOS] CentOS 6 spontaneous reboots

[Keith Keller]

Hi Bill,

On 2016-05-30, Bill Gee <bgee at campercaver.net> wrote:
>
> By luck I saw the beginning of a reboot on the server console.  Normally I have 
> other systems up on the KVM switch.  It appears to have dumped core.  I don't 
> know where to look for the core dump files.  They are not in /root.

One place you might check is under /var/lib.  I think there may be a
/var/lib/crash directory which contains core dumps.

> I ran MemTest 86+.  No memory errors were found.

Another option is to try Advanced Cluster Breakin, which runs other
tests besides memory.

http://www.advancedclustering.com/products/software/breakin/

I've had it find problems that memtest hasn't (and vice-versa).

> Lm_sensors shows the processor running between 45 and 50C.

If the system supports IPMI, check those sensors and logs, there may be
something useful there.  If you don't have IPMI, there may still be
something in the BIOS logs (how you get to those varies wildly, you may
need to boot into the BIOS to do it).

I hope that helps!

--keith

-- 
kkeller at wombat.san-francisco.ca.us