MySQL Connection Timeout Issue - Grails Application on Tomcat using Hibernate and ORM

Question

I have a small grails application running on Tomcat in Ubuntu on a VPS. I use MySql as my datastore and everything works fine unless I leave the application for more than ha

Answer 1

Starting from grails 2.3.6 default configuration already has options for preventing closing connection by timeout

These are the new defaults.

    properties {
       // See http://grails.org/doc/latest/guide/conf.html#dataSource for documentation
       ....
       minIdle = 5
       maxIdle = 25
       maxWait = 10000
       maxAge = 10 * 60000
       timeBetweenEvictionRunsMillis = 5000
       minEvictableIdleTimeMillis = 60000
       validationQuery = "SELECT 1"
       validationQueryTimeout = 3
       validationInterval = 15000
       testOnBorrow = true
       testWhileIdle = true
       testOnReturn = false
       jdbcInterceptors = "ConnectionState;StatementCache(max=200)"
       defaultTransactionIsolation = java.sql.Connection.TRANSACTION_READ_COMMITTED
    }