I've started looking through the log files you sent, and while this doesn't solve your problem, why do you have your transaction timeout set as low as this? Is this intentional? You would minimise your error rate by increasing this so that not as many transactions time out. anonymous wrote : 2009-02-11 16:05:32,325 68671 DEBUG[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)' Setting tx as Name=[EJB uk.co.cdl.servercomponent.admin.service.AdminServiceEJB.bounceCache(int)],Xid=BEA1-0003479EAA486F45BCD8(32306485),Status=Marked rollback. [Reason=weblogic.transaction.internal.TimedOutException: Transaction timed out after 64 seconds | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4209461#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...