Message-Driven Beans, Message not send / received

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Problem: When sending a message via JMS (transactions enabled) this message is not received by other MessageListener.

QueueConnection queueConnection = queueConnectionFactory.createQueueConnection();
Session session = queueConnection.createSession(true, 0);
MessageProducer messageProducer = session.createProducer(queue);
ObjectMessage m = session.createObjectMessage(new ObjectMessage());
messageProducer.send(m);
session.close();

Solution: Add an additional session.commit(); before closing the session.

Further information: session.close() will not implicitly invoke session.commit()! This is probably due to the fact that session.commit() throws an exception if this session was created without transaction support. e.g.

Session session = queueConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);

Note: This behavior was observed on JBoss AS 6. As far as I know, parameters to createSession() method should be ignored according to the specifications. But such implementations are certainly vendor specific.