Is there something special about EntryDuplicatedException? Also, what is your experience with addDuplicatedMessage()? Does this methog try to access the database in any way? Example of a problem: Let's say UserAction has a method @End | public String save() The UserService tries to merge the user entity bean but an exception occurs (i.e. UniqueConstraint on the First+Last Name). This means that the changes to the object are invalid. In my experience if you try to use the entity manager in the catch clause you will receive a "Transaction not active" error. Then how could I reload the object and return to its persisted state? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4086109#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...