Server reboots on its own once a night

[zigzam]

For the last two days the server has rebooted itself twice at the same time each night around 12:00AM

Shows this in the log:

Nov 16 00:04:52 saturn exim: exim shutdown succeeded
Nov 16 00:04:52 saturn exim: antirelayd shutdown succeeded
Nov 16 00:04:53 saturn exim: spamd shutdown succeeded
Nov 16 00:04:53 saturn exim: exim startup succeeded
Nov 16 00:04:53 saturn last message repeated 2 times
Nov 16 00:04:53 saturn exim: antirelayd startup succeeded
Nov 16 00:05:00 saturn exim: spamd startup succeeded
Nov 16 00:05:00 saturn antirelayd: antirelayd shutdown succeeded
Nov 16 00:05:01 saturn antirelayd: antirelayd startup succeeded
Nov 16 00:05:11 saturn exim: exim shutdown succeeded
Nov 16 00:05:11 saturn exim: antirelayd shutdown succeeded
Nov 16 00:05:11 saturn exim: spamd shutdown succeeded
Nov 16 00:05:11 saturn exim: exim shutdown failed
Nov 16 00:05:11 saturn exim: antirelayd shutdown failed
Nov 16 00:05:12 saturn exim: spamd shutdown failed
Nov 16 00:05:12 saturn exim: exim shutdown failed
Nov 16 00:05:12 saturn exim: antirelayd shutdown failed
Nov 16 00:05:12 saturn exim: spamd shutdown failed
Nov 16 00:05:12 saturn exim: exim startup succeeded
Nov 16 00:05:12 saturn last message repeated 2 times
Nov 16 00:05:12 saturn exim: antirelayd startup succeeded
Nov 16 00:05:13 saturn exim: spamd startup succeeded
Nov 16 00:05:24 saturn pure-config.pl: Running: /usr/sbin/pure-ftpd -O clf:/var/log/xferlog -lextauth:/var/run/ftpd.sock --daemonize -A -c50 -B -C8 -D -E -fftp -H -I15 -lextaut$
Nov 16 00:05:24 saturn pure-ftpd: pure-config.pl startup succeeded


Nov 17 00:05:15 saturn exim: exim shutdown succeeded
Nov 17 00:05:15 saturn exim: antirelayd shutdown succeeded
Nov 17 00:05:15 saturn exim: spamd shutdown succeeded
Nov 17 00:05:15 saturn exim: exim startup succeeded
Nov 17 00:05:15 saturn last message repeated 2 times
Nov 17 00:05:16 saturn exim: antirelayd startup succeeded
Nov 17 00:05:23 saturn exim: spamd startup succeeded
Nov 17 00:05:23 saturn antirelayd: antirelayd shutdown succeeded
Nov 17 00:05:23 saturn antirelayd: antirelayd startup succeeded
Nov 17 00:05:34 saturn exim: exim shutdown succeeded
Nov 17 00:05:34 saturn exim: antirelayd shutdown succeeded
Nov 17 00:05:34 saturn exim: spamd shutdown succeeded
Nov 17 00:05:34 saturn exim: exim shutdown failed
Nov 17 00:05:34 saturn exim: antirelayd shutdown failed
Nov 17 00:05:34 saturn exim: spamd shutdown failed
Nov 17 00:05:34 saturn exim: exim shutdown failed
Nov 17 00:05:34 saturn exim: antirelayd shutdown failed
Nov 17 00:05:34 saturn exim: spamd shutdown failed
Nov 17 00:05:34 saturn exim: exim startup succeeded
Nov 17 00:05:34 saturn last message repeated 2 times
Nov 17 00:05:35 saturn exim: antirelayd startup succeeded
Nov 17 00:05:36 saturn exim: spamd startup succeeded




What could be causing this? Before the last two nights the server was up 150+ days straight.

[cPanelTodd]

Check for any cronjobs running around this time to be sure there isn't something running that is causing this. You may also want to check /var/log/messages for any errors or log output around the time the reboot was initiated.