Centos server reboots itself

centoslogging

I am running centos 6.x on my server. It rebooted itself at 10.30am and 11.13am today.

I checked /var/log/messages file and couldn't understand. What can be cause to reboot?

My log file (I couldn't paste it here because character limit):

Best Answer

Check your servers memory by memtest86+. You can install it on the Centos system:

# yum -y install memtest86+
# memtest-setup

Then reboot system and choose memtest at boot grub menu. Before all you need to ensure that klogd is running and kernel log file exists at /var/log/kernel.

I think reboot initiated by watchdog timer. If memory is good then show us dmesg command output and /var/log/kernel file.

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You should perform a ps aux to see if any of the shutdown scripts are hung waiting for a process to finish. It should look something like this:

/etc/rc6.d/K##procname

You can try manually issuing a kill command for that hung script. Strange though, since there's a timeout set on the scripts where it will force a -KILL signal to any leftover process.

Also, what's the uptime of the server/box? I've experienced an issue in the past where a box that has an uptime of over a year refuses to shut down. In that case, I've killed each process manually, run sync several times to flush all data to disk and forced a reboot (power cycle).

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Commenting out the printers section actually does nothing, add this to your smb.conf:

load printers = no
printing = bsd
printcap name = /dev/null
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(spoolss is not a typo)

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