We also have this problem, we are trying to use JBoss 4.0.4.GA and Messaging 1.0.1 CR2. If this was a known problem in JBoss MQ and a workaround developed has it been addressed properly in JBoss messaging?. Does Oracle version play any part? we are also using 9i but are planning to upgrade to 10g - however as far as I know this does not invove a change of JDBC thin client driver (still ojdb14.jar)???. A JMS system that does not allow you to persist messages > 4k in size on Oracle doesnt seem particularly useful!. Any advice much appreciated. Thanks, Stuart View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3957125#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...