Does anyone know which JMS messages will be resent in CLIENT_ACKNOWLEDGE mode if the client works?

Question

The spectrum says: "Recognizing a consumed message automatically confirms receipt of all messages that were delivered by its session," but I need to know what it means "delivered."

For example, if I call customer.receive () 6 times and then I call. The knowledge on the third message is (a) only the first 3 messages that are ack'd, or (b) all 6?

I really hope this is option a, i.e. messages after you called confirmation on WILL were re-added, otherwise it would be difficult to understand how you could prevent message loss if my receiver process failed before I could save and acknowledge messages. But the specification is worded so that it is not clear. I get the impression that the authors of the JMS specification considered a broker failure, but did not think too long about how to protect against client failure: o (

Thanks Ben

Answer 1

According to the specification, option (b) is the correct behavior. If you get option (a) and rely on it, the application will not be portable.

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