I've had a pretty basic server up and running CentOS with webserver/database, and have noticed that it has locked up a few times in the middle of the night. It seems to happen randomly.

When it locks up I can ssh in, (although it seems to hang once connected), but can't access cpanel/whm and have to reboot the server to get everything back up.

Checking the messages log I see the below like clockwork every 5minutes 1 second, and then it just stops logging anything until I reboot. I can't seem to find any log showing any issue? Is there somewhere I can check to try to figure out what is happening?

Could this be caused by CPU being maxed?

Nov 17 08:01:35 s1 pure-ftpd: (__cpanel__service__auth__ftpd__Q13SKrtaCJCHjBezTfU8Iqmsi@127.0.0.1) [INFO] Logout.
Nov 17 08:06:36 s1 pure-ftpd: ([email protected]) [INFO] New connection from 127.0.0.1
Nov 17 08:06:36 s1 pure-ftpd: ([email protected]) [INFO] __cpanel__service__auth__ftpd__mxidFBSnQXmR0QzqSxlqrXLIH0CmJ0GPh9bZ5V3 is now l
ogged in
Nov 17 08:06:37 s1 pure-ftpd: (__cpanel__service__auth__ftpd__mxidBDaCgnqSxlqrXLIH0CmJ0GPh9bZ5V3@127.0.0.1) [INFO] Logout.
Nov 17 08:11:37 s1 pure-ftpd: ([email protected]) [INFO] New connection from 127.0.0.1
Nov 17 08:11:38 s1 pure-ftpd: ([email protected]) [INFO] __cpanel__service__auth__ftpd__T4B7F71acf1dsdJSeJHdqKNcbOdpzNnN_GttgcM is now l
ogged in
Nov 17 08:11:38 s1 pure-ftpd: (__cpanel__service__auth__ftpd__T4B7F71acf1KNcbOdpzNnN_GttgcM@127.0.0.1) [INFO] Logout.
Nov 17 08:16:38 s1 pure-ftpd: ([email protected]) [INFO] New connection from 127.0.0.1
Nov 17 08:16:38 s1 pure-ftpd: ([email protected]) [INFO] __cpanel__service__auth__ftpd__W5C1RzumtaNwe4cU8Lt1 is now logged in
Nov 17 08:16:38 s1 pure-ftpd: ([email protected]) [INFO] Logout.


Nov 17 09:10:58 s1 kernel: imklog 4.6.2, log source = /proc/kmsg started.
Nov 17 09:10:58 s1 rsyslogd: [origin software="rsyslogd" swVersion="4.6.2" x-pid="1094" x-info="http://www.rsyslog.com"] (re)start
Nov 17 09:10:58 s1 kernel: Initializing cgroup subsys cpuset