You get an transaction timeout after the default duration of 5 minutes. You can change the default value of the transaction manger by changing the xml config file or you can specify other timeouts by using the following annotation: @TransactionTimeout(value = 3600). You'll have to define this at the business method which starts the transaction implicitly. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4257226#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...