Ilya Sorokoumov [http://community.jboss.org/people/ilya40umov] created the discussion "Re: MDB's maxSession property cluster" To view the discussion, visit: http://community.jboss.org/message/578705#578705 -------------------------------------------------------------- In Jboss 4.2.3 messaging service can work only one server at once. Hence it should work on 4.2.3. But I  also suggest you try this annotation @PoolClass in addition to maxSession. I guess it should work for 5.x as well but with annotation @Pool. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/578705#578705] Start a new discussion in EJB3 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]