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From "Kaustubh Khasnis (JIRA)" <>
Subject [jira] [Commented] (AMQ-1853) Optional non-blocking redelivery
Date Wed, 24 Aug 2011 09:41:29 GMT


Kaustubh Khasnis commented on AMQ-1853:

Hi all,
but doesn't JMS spec says that the message delivery should stop and start from the oldest
acknowledged message?? Just a thought

> Optional non-blocking redelivery
> --------------------------------
>                 Key: AMQ-1853
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Wish
>          Components: Broker
>    Affects Versions: 5.1.0
>            Reporter: Demian Mrakovich
>             Fix For: 5.6.0
> When a message is redelivered the consumer blocks for the amount of time specified by
the redelivery delay. For a high load scenario where message order is irrelevant this is just
reducing performance and will result in a complete halt if the delay is long and several bad
messages are consumed in a short time. 
> I think what I basically wish for is how it worked in versions 3.x, prior to fix for
AMQ-268. So I would very much like to have configurable option to NOT block consumers when
redelivering messages. 
> If no-one feels up to it, I'd still appreciate some hints and I could try to fix it myself.
Looking at ActiveMQMessageConsumer.rollback(), I was thinking something in the lines of just
scheduling a task to put the message back on queue after a delay - if configured to, instead
of stopping delivery and a schedule a task to resume delivery again. But I do not possess
an understanding of AMQ thorough enough to predict potential side effects of this, so any
analysis would be helpful.

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