Is it possible to acknowledge individual messages on a queue without affecting previously received, but as yet unacknowledged, messages?
Created May 4, 2012
If you acknowledge a message, all previously received messages will also be acknowledged. From the javax.jms.Message Javadoc, the acknowledge method will "Acknowledge this and all previous messages received."
So the answer to your question is no, if what you meant by "affecting" is not-yet acknowledged.