Server rebooted unexpectedly

Issue

• Below messages are seen in the logs:

host1 init: Switching to runlevel: 0
host1 gpm[5283]: *** info [mice.c(1766)]: 
host1 gpm[5283]: imps2: Auto-detected intellimouse PS/2
host1 OVCtrl: ovc instance NOT running
host1 OVCtrl: 
host1 rc: Stopping OVCtrl:  succeeded
host1 haldaemon: haldaemon -TERM succeeded
host1 messagebus: messagebus -TERM succeeded
host1 rhnsd[5545]: Exiting
host1 rhnsd: rhnsd shutdown succeeded
host1 atd: atd shutdown succeeded
host1 opcagt: Stopping OVO agent:
host1 opcagt: (ctrl-111) Ovcd is not yet started.
host1 opcagt: 
host1 opcagt: 
host1 rc: Stopping opcagt:  succeeded
host1 xfs[5346]: terminating 
host1 xfs: xfs shutdown succeeded
host1 gpm: gpm shutdown succeeded
host1 sshd: sshd shutdown succeeded
host1 sendmail: sm-client shutdown succeeded
host1 sendmail: sendmail shutdown succeeded
host1 xinetd[5192]: Exiting...
host1 xinetd: xinetd shutdown succeeded
host1 acpid: acpid shutdown succeeded
host1 crond: crond shutdown succeeded
ntpd[5210]: ntpd exiting on signal 15
ntpd: ntpd shutdown succeeded
host1 auditd[5007]: The audit daemon is exiting.
host1 kernel: audit(1328632051.459:4429): audit_pid=0 old=5007 by auid=4294967295
host1 auditd: auditd shutdown succeeded
host1 irqbalance: irqbalance shutdown succeeded
host1 portmap: portmap shutdown succeeded
host1 kernel: Kernel logging (proc) stopped.
host1 kernel: Kernel log daemon terminating.
host1 syslog: klogd shutdown succeeded
host1 exiting on signal 15