Thanks for reply Karthik.
I tried old way of
JDBC api from my JPA DAO class, to check the connection problem, and realized that I'm able to query the DB from my server by
java.
So I corrected all my config files. there was a discrepancy in db.properies and persistence.xml.
Its all working fine now.
Below are my working configurations.
Spring Config
Persistance XML
db.properties