hadoop: Java to DB connection exceptions

We are developing web application our tomcat server and mysql server runs on two different servers and we are getting the errors


org.hibernate.TransactionException: JDBC begin transaction failed: 

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 86,402,200 milliseconds ago.

java.net.SocketException: Broken pipe

org.hibernate.exception.JDBCConnectionException:

need help to solve the issue

have tried the solutions from these links

Hibernate Session Could not open for transaction

First Login: HTTP Status 500 - Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: