com.mysql.jdbc.exceptions.jdbc4.CommunicationsException

I have noticed this error in my MySql Outage, suddenly going down due to overload.after my observation I found that this kind of error mostly will cause because of system variables settings of wait_timeout and interactive_timeout on mysql server is set lower than datasourceidle timeout period.my datasource pooling property for conection time out is set to 1 minon server variable wait_timeout is