I'm getting the exact same error on JBoss 4.0.3SP1 with Oracle. 2007-05-25 23:32:34,604 WARN [org.jboss.tm.TransactionImpl] Transaction TransactionImpl:XidImpl[FormatId=257, GlobalId=manta/567, BranchQual=, localId=567] timed out. status=STATUS_ACTIVE I tried increasing TransactionTimeout in jboss-service.xml to a very large number (648000) and my process still dies after about 1.5 hours. I'm pretty sure my process can finish in under 2 hours but can't get past the 1.5 hour mark. The process is being started from the browser and user session is set to expire after 1 hour inactivity. Could this have anything to do with it? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048817#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...