I'm trying to get WebSphere MQ 7.0.0.0 (90-day evaluation copy) to work transactionally.

The commit() and rollback() methods work, but only if you call them. If you fail the JVM or just exit the app ungracefully, any uncommitted messages are committed - they should be rolled back.

What am I doing wrong?

Test code follows:

public static void main(String[] args)
{
try{
// Fiddled non-JNDI provided factory.
MQQueueConnectionFactory factory = new MQQueueConnectionFactory();
factory.setTransportType(JMSC.MQJMS_TP_CLIENT_MQ_T CPIP);
factory.setHostName("MQ_SERVER");
factory.setPort(1415);

// Standard JMS API classes.
QueueConnection connection = factory.createQueueConnection("", "");
QueueSession session = connection.createQueueSession(true, Session.SESSION_TRANSACTED);
Queue queue = session.createQueue("queue://TEST_Q_MAN/TEST_Q");
QueueSender sender = session.createSender(queue);
TextMessage message = session.createTextMessage();
message.setText("Hello World");
sender.send(message);
//session.rollback();
//sender.close();
//session.close();
//connection.close();
}catch(Exception e){
e.printStackTrace();
}
}