WebLogic AdminServer Error-“unable to get file lock, will retry”

Cause:

• When WebLogic Server Starts,it creates a lock file with .lok extension under

          $DOMAIN_HOME/server/<Server_Name>/tmp location

• It cleans .lok file when weblogic server stops
• If OS or Server abnormally rebooted during weblogic server stop the .lok file exists in $DOMAIN_HOME/server/<Server_Name>/tmp location
• Remove .lok file before restarting weblogic server or managed server
• Never remove .lok filewhen Admin or Managed Server is running

 Solution:

1. Navigate to $DOMAIN_HOME/server/<Server_Name>/tmp location
2. Remove .lok file in tmp folder using

          rm -rf *.lok

3. Restart Weblogic server or managed server