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From "James Strachan" <>
Subject Re: Message groups, failover, recovery problem
Date Tue, 24 Apr 2007 07:11:48 GMT
Message Groups are a feature used within a single broker to implement
sticky load balancing across consumers. They are not intented as a way
to load balance across brokers.

My recommendation would be to use one of the Master/Slave approaches
with Message Groups.

On 4/20/07, prylance <> wrote:
> I'm testing a HA configuration, using activeMQ 4.1.1. I have two brokers and
> a client sending messages with failover between the brokers. I tried using
> the message groups feature to ensure that messages always went to the same
> broker, unless that broker failed. This works well ... very cool feature.
> I failed one of my brokers and confirmed that subsequent messages for the
> message group were automatically redirected to the remaining broker. Then I
> brought my failed broker back up, and sent another bunch of messages using
> the same message group. This time the messages were distributed across the
> two brokers. The message group feature didn't work any more. Is this a bug?
> I'm running with embedded AMQ brokers in JBoss 4.0.5, using the
> activemq-rar.
> Thanks,
> Pete
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