Sarish, there seems to be something wrong here. Can you please create a JIRA issue? If you could give your code the shape of a unit test (that did not require EJBs) that would be great. In particular, the ProcessClassLoader follows the delegation model, meaning that long.class should be resolved by the parent loader and never passed to the ProcessClassLoader. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4243074#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...