I was trying to unlock it but every time I had to do a complete Tomcat shut down wait for 5-10 mins and bring it up.
I was searching for an appropriate answer but the closest one was the one from the threads in Stack Overflow.
It solved my problem immediately.
"Try using antiResourceLocking='true' in your
$tomcat_home/conf/context.xml. This should at least help to release the locks"
Hopefully some one gets this benefit from my forum.