I'm trying to migrate an app from Weblogic to JBoss and I have a session bean managing entity beans. In my session bean, I have a method to lookup an entity bean by its String primary key. If the value is null, then JBoss throws an java.lang.IllegalArgumentException: findByPrimaryKey called with null argument. What gives with this? Why can't the EntityContainer just throw an ObjectNotFoundException? I find this very unsettling as this same code works fine under Weblogic and it properly throws an ObjectNotFoundException which my code properly catches and handles... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4261915#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...