Redelivery in Auto Acknowledge Mode

Question

Hi all,
On reading the JMS spec I found the following text
�AUTO_ACKNOWLEDGE - With this option, the session automatically acknowledges a client�s receipt of a message when it has either successfully returned from a call to receive or the MessageListener it has called to process the message successfully returns.�
I take this to mean if the call to process the message returns unsuccessfully i.e. by throwing a runtime exception. Then it will redeliver the message. It works fine in Weblogic 5.1. I was wondering if this is the correct way to do this or is there another proper way to do this?
Cheers,
Ben.

Answer 1

According to the spec, throwing a RuntimeException marks the client as errorneous. It might be that the provider disables the client or the client's session. At least this is what SwiftMQ does, for example. So if you throw a RuntimeException, the message is redelivered but not to the client which throwed the exception because it's disabled. However, this depends how the provider implements it.
If you want clean redelivery, I recommend to use client ack or transacted sessions.
-- Andreas