Another point: ClientMessage:isLargeMessage() ClientMessage:setLargeMessage() is only getting called for file messages, not large messages in general. Also in ServerConsumerImpl: Ugly instanceof check: if (message instanceof ServerLargeMessage) { Instead, how about moving isLargeMessage to the Message interface so it's implemented by both ClientMessage and ServerMessage, and it can be specified in the constructor? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4191468#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...