Close SessionFactory in Hibernate 4.3

Question

I\'m upgrading my Hibernate to the latest version. With my old HibernateUtil.java I had no problems but when upgrading it, the SessionFactory doesn\'t seem to c

Answer 1

You're right, there appears to be a bug in Hibernate 4.3.x in which a thread spawned by Hibernate's default connection pool doesn't get cleaned up on shutdown. I filed a bug here (please vote!):

https://hibernate.atlassian.net/browse/HHH-8896

Until it's fixed, you have two choices. You can add a method to your HibernateUtil and use it to force the connection pool to clean itself up at the end of your app's execution:

public static void stopConnectionProvider() {
    final SessionFactoryImplementor sessionFactoryImplementor = (SessionFactoryImplementor) sessionFactory;
    ConnectionProvider connectionProvider = sessionFactoryImplementor.getConnectionProvider();
    if (Stoppable.class.isInstance(connectionProvider)) {
        ((Stoppable) connectionProvider).stop();
    }        
}

This works, but it's ugly, hacky, uses a deprecated method, etc. The better solution would be to just use a "real" connection pool, like c3p0, which can be enabled just by adding the following properties to your hibernate.cfg.xml:

1
100
10
10
10
100

Note that if you use another connection pool, you should remove this connection pool property which is currently in your config:

1

Edit: to use c3p0 connection pooling you'll also need the hibernate-c3p0 dependency. Maven example for 4.3.0-SNAPSHOT from the Hibernate snapshots repo:

  ...
  
    hibernate-snapshots
    http://snapshots.jboss.org/maven2/
  
  ...



 ...
 
   org.hibernate
   hibernate-c3p0
   4.3.0-SNAPSHOT
 
 ...