anonymous wrote : Anyway Connection conn is an istance variable in the doGet servlet method You mean a local variable? If so, yeah, you're not caching it, so new connection creation should be load balanced. If closing the connection doesn't resolve your problem I suggest you post on the JBoss Messaging user forums. The folks who know the deep details of how the connection factories work are more likely to see your issue there. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4240109#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...