com.mysql.jdbc.exceptions.jdbc4.CommunicationsExce ption

com.mysql.jdbc.exceptions.jdbc4.CommunicationsExce ption: The last packet successfully received from the server was276150 seconds ago.The last packet sent successfully to the server was 276150 seconds ago, which is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.

This exception is coming while logging into the application for the first time in a day. Have given the 'autoReconnect=true' option in context.xml of the application.