weblogic.common.ResourceException: Could not create pool connection. The DBMS driver exception was: null in Weblogic 10.3

weblogic.common.ResourceException: Could not create pool connection. The DBMS driver exception was: null  in Weblogic 10.3


1. Check DataSource xml It's in the domain's

config/jdbc directory. 

2.     Check DB Port 

3. Check user=xxx in properties

4. Some times JRF template causing issue due to ojdbcdms.jar is loaded first 

       Solution: - remove JRF

                      - or exclude ojdbcdms.jar from CLASSPATH

                      - or Upgrade to Weblogic12c