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

For grails 1.3.X, I had to add the following code to Bootstrap.groovy :

  def init = {servletContext ->
  def ctx=servletContext.getAttribute(ApplicationAttributes.APPLICATION_CONTEXT)

    //implement test on borrow
    def dataSource = ctx.dataSource
    dataSource.targetDataSource.setMinEvictableIdleTimeMillis(1000 * 60 * 30)
    dataSource.targetDataSource.setTimeBetweenEvictionRunsMillis(1000 * 60 * 30)
    dataSource.targetDataSource.setNumTestsPerEvictionRun(3)
    dataSource.targetDataSource.setTestOnBorrow(true)
    dataSource.targetDataSource.setTestWhileIdle(true)
    dataSource.targetDataSource.setTestOnReturn(false)
    dataSource.targetDataSource.setValidationQuery("SELECT 1")

  }

I also had to import org.codehaus.groovy.grails.commons.ApplicationAttributes