Red Hat 7.1 server rebooting amost daily

In every case the relevant part of the messages file looks like below :

Sep 7 12:43:01 servername systemd: Started Session 4592 of user nginx.
Sep 7 12:44:37 servername rsyslogd: [origin software="rsyslogd" swVersion="7.4.7" x-pid="658" x-info="http://www.rsyslog.com"] start
Sep 7 12:44:37 servername rsyslogd-2307: warning: ~ action is deprecated, consider using the 'stop' statement instead [try http://www.rsyslog.com/e/2307 ]
Sep 7 12:44:28 servername journal: Runtime journal is using 8.0M (max 189.5M, leaving 284.3M of free 1.8G, current limit 189.5M).
Sep 7 12:44:28 servername kernel: Initializing cgroup subsys cpuset
Sep 7 12:44:28 servername kernel: Initializing cgroup subsys cpu
Sep 7 12:44:28 servername kernel: Initializing cgroup subsys cpuacct
Sep 7 12:44:28 servername kernel: Linux version 3.10.0-229.4.2.el7.x86_64 (mockbuild@x86-020.build.eng.bos.redhat.com) (gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC
) ) #1 SMP Fri Apr 24 15:26:38 EDT 2015
Sep 7 12:44:28 servername kernel: Command line: BOOT_IMAGE=/vmlinuz-3.10.0-229.4.2.el7.x86_64 root=/dev/mapper/rhel-root ro rd.lvm.lv=rhel/swap crashkernel=auto rd.lvm.l
v=rhel/root rhgb quiet LANG=en_GB.UTF-8 systemd.debug

Does anyone know if this can be cured with a patch ?
yum update ?

George