org.springframework.dao.DataAccessResourceFailureException: OJB operation; SQL []; Communications link failure

The last packet successfully received from the server was 5 milliseconds ago.  The last packet sent successfully to the server was 4 milliseconds ago.; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 5 milliseconds ago.  The last packet sent successfully to the server was 4 milliseconds ago.