Nevermind. My bad. I had an unserializeable object in my class. I'm not getting this error anymore. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3994814#3994814 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3994814