9.2. Notes and Limitations

The following points should be noted in regard to ordering group functionality:

Queues must be used with the ordering group feature. The feature will not work with topics.
The ordering group feature should not be used in conjunction with message selectors and scheduled delivery.
A message is considered completed, and the next message will be available for delivery, if the original message is dead or has expired. A dead message is moved to the DLQ whereas an expired message is moved to the ExpiryQueue.
When using a ConnectionConsumer, the ordering of the messages will be observed. However, the ConnectionConsumer does not control which session will receive the next message.
In the case of a Distributed Queue, the user should use HASingleton to ensure that the ordering group feature functions correctly.