You shouldn't use a clustered connection factory with MDBs - if you look - the default configuration uses a non clustered connection factory. Using a clustered connection factory means subsequent create connection attempts will round robin - this is typically not what you want with MDBs. MDBs should always consume from the local machine. This would explain what you are seeing. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4158271#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...