ClassCastException During Hibernate Session.get() when using

[gigsvoo]

Hi there,

I deployed a SAR into JBoss 4.2.2 using shipped hibernate version. The JNDI of the SessionFactory loaded and in my WAR (deployed same with SAR at JBOSS_HOME/server/default/deploy) is able to get SessionFactory and Session object.

When I try to do a

ClassA a = session.get(ClassA.class, id);


I would hit ClassCastException error. During debug session, I had saw the right side return the ClassA object but when it trying to assigned to left side, the error comes out.

The same class of ClassA existed both inside the SAR deployed as well as the WAR deployed.

What could be the reason?

Note: If I turn on the


Java2ClassLoadingCompliance
UseJbossWebLoader



switches in JBOSS_HOME\server\default\deploy\jboss-web.deployer\META-INF\jboss-service.xml then everything works fine. But I can't do that because they are other components requires library from tomcat container.

Please help. Thanks

[jaikiran]

You probably have to enable classloader isolation for your applications. See these for more details

http://wiki.jboss.org/wiki/ClassCastExceptions

http://wiki.jboss.org/wiki/ClassLoadingConfiguration

http://wiki.jboss.org/wiki/JBossClassLoadingUseCases

[gigsvoo]

Thanks for the pointers. After examine using the JMX console and found out that there are duplicate class existed in SAR and WAR deployment, since the classloading task is delegated to tomcat deployer hence the ClassCastException surfaced.