Jms message acknowledgement

Question

I have an issue related to java messaging service ... Problem: suppose my JMS publisher sends me 5 messages... When I receive first two messages my app processes them and acknowledges them... So that it is removed from the topic... Wen I receive 3rd message, because of some problem my app cannot process it and doesn't acknowledge... But 4th and 5th message got processed and acknowledged... But wen I checked the admin console I found out that the 3rd message is also acknowledged...

I want to know how to acknowledge each message individually. Anybody has idea???

Note: I'm using CLIENT_ACKNOWLEDGE mode.

Answer 1

According to JMS specification CLIENT_ACKNOWLEDGE - acknowledging a consumed message automatically acknowledges the receipt of all messages that have been delivered by its session.

Many JMS providers have implemented above specification and hence don't provide acknowledging one message. But some JMS providers (AcitveMQ ??) do implement per message acknowledgement. So you will need to check with your JMS provider if it supports per message acknowledgement feature.