[clue-tech] Unexpected Reboots

[William]

List,

One of my RHEL/CentOS servers appears to be restarting itself 
unexpectedly.  This machine is an unattended server (there is no 
workstation for someone to sit at) which runs 24/7.  After reviewing the 
logs, I cannot identify any reason for this behavior.  In fact, the 
whole reboot process looks clean (no errors, no corruption), as if 
deliberate.  I have included at the end of this message a snippet (in 
brevity) of the /var/log/messages log file right at the point of reboot.

As you can see, the system went down sometime between 15:00 and 16:12 
for no apparent reason.  The system appears to come back up normally and 
I only know that it rebooted because I review the log files daily.  This 
is the third time that I've caught the reboot, and there does not seem 
to be any pattern.  Because of this lack of obvious reason, I need your 
expertise to troubleshoot, and stop, this behavior.  Any ideas?  I 
assume you'll want more information, but I cannot anticipate exactly 
what, so please feel free to ask for specific details.

Thanks!!

=======================
<lots of crond messages>
Jan 18 15:00:01 naruto crond(pam_unix)[25568]: session opened for user 
root by (uid=0)
Jan 18 15:00:02 naruto crond(pam_unix)[25568]: session closed for user root
Jan 18 15:01:01 naruto crond(pam_unix)[25570]: session opened for user 
root by (uid=0)
Jan 18 15:01:01 naruto crond(pam_unix)[25570]: session closed for user root
Jan 18 16:12:29 naruto syslogd 1.4.1: restart.
Jan 18 16:12:29 naruto syslog: syslogd startup succeeded
Jan 18 16:12:29 naruto kernel: klogd 1.4.1, log source = /proc/kmsg started.
Jan 18 16:12:29 naruto kernel: Linux version 2.6.9-11.EL 
(buildcentos at build1.hughesjr.centos.org) (gcc version 3.4.3 20050227 
(Red Hat 3.4.3-22)) #1 Wed Jun 8 16:59:52 CDT 2005
Jan 18 16:12:29 naruto kernel: BIOS-provided physical RAM map:
<normal system boot messages>
=======================

-- 
William Kimball, Jr.
http://www.kimballstuff.com/
"Programming is an art-form that fights back!" (Unknown)

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