Not sure why it shutdown by itself but it did. Here are logs. Any help would be great!
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/rrdcached/counter-journal-rotates.rrd, [1463252422:0], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-0/cpu-nice.rrd, [1463252422:0], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-0/cpu-system.rrd, [1463252422:7652], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-0/cpu-idle.rrd, [1463252422:144210], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-0/cpu-wait.rrd, [1463252422:42473], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-0/cpu-interrupt.rrd, [1463252422:0], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-0/cpu-softirq.rrd, [1463252422:743], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-0/cpu-steal.rrd, [1463252422:0], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-1/cpu-user.rrd, [1463252422:7838], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-1/cpu-nice.rrd, [1463252422:0], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-1/cpu-system.rrd, [1463252422:4635], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-1/cpu-idle.rrd, [1463252422:134990], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-1/cpu-wait.rrd, [1463252422:57371], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-1/cpu-interrupt.rrd, [1463252422:0], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-1/cpu-softirq.rrd, [1463252422:10], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:22 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/cpu-1/cpu-steal.rrd, [1463252422:0], 1) failed with status -1.
May 14 12:00:22 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:00:24 openmediavault collectd: Not sleeping because the next interval is 43.788 seconds in the past!
May 14 12:00:54 openmediavault CRON: pam_unix(cron:session): session opened for user root by (uid=0)
May 14 12:00:54 openmediavault /USR/SBIN/CRON: (root) CMD (/usr/sbin/omv-mkgraph >/dev/null 2>&1)
May 14 12:00:54 openmediavault rrdcached: Received FLUSHALL
May 14 12:00:58 openmediavault CRON: pam_unix(cron:session): session closed for user root
May 14 12:06:05 openmediavault shutdown: shutting down for system halt
May 14 12:06:22 openmediavault init: Switching to runlevel: 0
May 14 12:06:22 openmediavault shutdown: shutting down for system halt
May 14 12:06:32 openmediavault monit: Shutting down monit HTTP server
May 14 12:06:35 openmediavault watchdog: stopping daemon (5.12)
May 14 12:06:35 openmediavault monit: monit HTTP server stopped
May 14 12:06:35 openmediavault monit: monit daemon with pid [2237] killed
May 14 12:06:35 openmediavault monit: 'localhost' Monit stopped
May 14 12:06:37 openmediavault wd_keepalive: starting watchdog keepalive daemon (5.12):
May 14 12:06:37 openmediavault wd_keepalive: int=10 alive=/dev/watchdog realtime=yes
May 14 12:06:37 openmediavault wd_keepalive: hardware wartchdog identity: Software Watchdog
May 14 12:06:37 openmediavault wd_keepalive: unable to disable oom handling!
May 14 12:06:51 openmediavault kernel: [ 2426.615802] nfsd: last server has exited, flushing export cache
May 14 12:06:51 openmediavault collectd: Exiting normally.
May 14 12:06:51 openmediavault collectd: collectd: Stopping 5 read threads.
May 14 12:06:51 openmediavault rrdcached: caught SIGTERM
May 14 12:06:51 openmediavault rrdcached: starting shutdown
May 14 12:06:51 openmediavault collectd: rrdcached plugin: rrdc_update (/var/lib/rrdcached/db/localhost/rrdcached/gauge-tree_depth.rrd, [1463252802:7.000000], 1) failed with status -3.
May 14 12:06:51 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:06:51 openmediavault collectd: rrdcached plugin: rrdc_connect (unix:/var/run/rrdcached.sock) failed with status 2.
May 14 12:06:51 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:06:51 openmediavault collectd: rrdcached plugin: rrdc_connect (unix:/var/run/rrdcached.sock) failed with status 2.
May 14 12:06:51 openmediavault collectd: Filter subsystem: Built-in target `write': Dispatching value to all write plugins failed with status -1.
May 14 12:06:51 openmediavault rpc.mountd: Caught signal 15, un-registering and exiting.
May 14 12:07:05 openmediavault rrdcached: clean shutdown; all RRDs flushed
May 14 12:07:09 openmediavault rrdcached: removing journals
May 14 12:07:09 openmediavault rrdcached: removing old journal /var/lib/rrdcached/journal/rrd.journal.1463243091.433554
May 14 12:07:09 openmediavault rrdcached: removing old journal /var/lib/rrdcached/journal/rrd.journal.1463246691.434795
May 14 12:07:09 openmediavault rrdcached: removing old journal /var/lib/rrdcached/journal/rrd.journal.1463250439.712229
May 14 12:07:09 openmediavault rrdcached: goodbye
May 14 12:07:39 openmediavault wd_keepalive: stopping watchdog keepalive daemon (5.12)
May 14 12:07:39 openmediavault acpid: exiting
May 14 12:07:39 openmediavault ntpd: ntpd exiting on signal 15