"semanticLance" wrote : similar issue for me and same exception. the difference for me is that i don't have a class-wide transaction attribute set. just one method calling another. caller does not support transactions and the called method requires a new transaction. | | my methods: | | | | @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) | | public void persistInt(SimpleInt myInt) { | | persistIntImplementation(getUser(), myInt); | | } | | | | | | @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) | | private void persistIntImplementation(User user, SimpleInt myInt) { | | myInt.setValue(myInt.getValue() + 1); | | em.persist(myInt); | | } | | this case is the same issue I posted and solved here: [url] http://www.seamframework.org/Community/EJB3AndSeamNonatomicTransactionsWi... bottom line: you can't use @TransactionAttribute annotation on private methods in a session bean. It just ignores it unfortunately which is what took me so long to figure this limitation out until I read JSR220. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4220403#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...