vCenter Operations Manager (vCops) errors and not collecting stats (/data out of space)

Recently I logged into vCenter Operations Manager (vCOPS) custom UI and found that all objects stopped collecting stats.

Troubleshooting: 

Logged into vCenter server and tried health status tab but received connection error.
In Custom UI select Environment tab -> Configuration -> Adapter instances.   Edit a vcenter instance and selected test. Received the following error

 "Test was not successful.  Connection refused to host: Secondvm-internal;nested exception is: java.net.ConnectionException: Connection refused"

I ran the same test on our VNX and Brocade adapter instances and received the exact same error.

In vCops Administration page under registration tab i selected the update bottom on vCenter Server registration and re-entered the password.  After a long while i received an exception error.
I went to status tab and saw that some of the vCenter Operations Manager Statuses was not running.
I tried to start the service but did not work and status did not change nor did i get an error message.

I SSH into the Analytics VM and tried to manually restart the service "vcops-admin restart".  showed that the database was not coming online on which i though about looking at space.

Ran "df -h" and found that the /data drive was out of space.

Solution:

Shut down vCops vapp container from vCenter server.
Edit the VM and add new disk.
Power on the vapp container.

vCops will automatically extend the /data drive with the newly added disk.


Links:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2016022