We investigated the application code and Ibatis sources. 1. All the application classes (Beans, Actionforms, Decorators) are serializable. (This takes care of all the objects in chain) 2. We suspected that Ibatis could be problem area and made all the classes serializable (For sanity sake) Yet the java.io.NotSerializableException: java.lang.Object is seen. Its becomming impossible to understand what could be the reason for this. Help Appreciated. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3960438#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...