jbossall-client.jar is deprecated after JBoss5 only. The reasoning for the deprecation is this: - Think about when a customer or user found a trivial bug. We then change the class and recompile it. Now we have to update at least two jars: -jboss-messaging.jar and jbossall-client.jar. - Now thing about another project doing the same.. say.. jboss-cache also found a bug, and updated jboss-all-client.jar. If we send this customer both updates, you won' t know what version of jbossall-client you should use. It' s a mess. That's why the jar was dropped after jboss5. jbossall-client is still being "supported" on jboss4, however I really think it would be a good idea staying away from it for those reasons I pointed you. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4225126#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...