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From Roelof Naude <roelof.na...@gmail.com>
Subject Re: Virtual Topic and missed messages gone missing with selectorAware=true
Date Mon, 01 Nov 2010 09:24:07 GMT
hi maciej,

i've run into the exact same problem:
http://issues.apache.org/activemq/browse/AMQ-3004

would really like some sort of work-around/fix for this myself.

On 11/01/2010 11:20 AM, Maciej Rakowicz wrote:
> All,
>
> amq 5.4.0. jdk 1.6
>
> Scenario:
> broker persistence=true, selectorAware=false
> Virtual Topic with say one queue. There is a consumer A connected to
> that queue with a selector. All works fine. Consumer A dies, messages
> pile up, consumer A starts back up, missed messages are redelivered.
> You can easily verify that queue receives all posted messages while
> consumer's down.
> Now, adding consumer B, since selectorAware=false and consumer B uses
> an exclusive selector messages sent to consumer A are not consumed by
> consumer B. All good save the fact that all unmatched messages end up
> polluting consumer's B queue. All according to the documentation.
> Flipping selectorAware to true solves one problem but introduces
> another (way more important in my setup). Unmatched messages won't
> pile up on consumer's B queue which is fine. However, if consumer A
> dies they are not sent to consumer's A queue (disappearing after
> reaching the topic - I dunno where they go) hence disabling any missed
> message delivery on consumer's A startup.
>
> I there any way around it? I really need to handle all missed messages
> with no exception. At the same time I cannot allow stacking up
> messages in each and every queue although they are not matched.
>
> Btw. I do not have a list of consumers in advance, the subscription is
> fully dynamic, although since broker runs persistence, once subscribed
> I do have an idea of who's subscribed even if connection is currently
> down.
>
> I would appreciate any hints.
>
> mac

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