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From Christian Posta <christian.po...@gmail.com>
Subject Re: VirtualTopic propagation question
Date Tue, 08 Oct 2013 19:24:34 GMT
By default, consumers drive demand for the demand forwarding bridge
(network connectors).

Gary has written a little about the terms:

http://blog.garytully.com/2012/07/activemq-broker-networks-think-demand.html

So if you have consumers popping up, you can expect messages to flow toward
those consumers.


On Mon, Oct 7, 2013 at 8:01 AM, Frazer Irving <
Frazer.Irving@mailonline.co.uk> wrote:

> Hi,
>
> I have a potential problem with my activemq setup, and I would appreciate
> any feedback. My setup is as follows:
>
> I have 2 activeMQ nodes, running in clustered mode. On these nodes I have
> a VirtualTopic "article". I subscribe to this topic using the following url
> using camel:
>
>
> failover://(tcp://amq-node-1:61616,tcp://amq-node-2:61616)?jms.watchTopicAdvisories=false&randomize=false
>
> Recently, to support another application, we have enabled stomp on
> amq-node-2. A client is connecting to the aforementioned virtualTopic from
> NodeJs.
>
> What we are seeing is that the queues associated with the VirtualTopic for
> the camel clients (Consumer.ConsumerX.VirtualTopic.article) are appearing
> on amq-node-2, and the pending messages for those queues keep going up.
>
> Messages are being processed by both the Node and Camel consumers. The
> pending messages on amq-node-1   show 0 pending.
>
> Can you tell me what is happening here? I presume the addition of the
> consumer on node2 is causing some form of replication to node2 that does
> not normally occur in our failover mode. Is this harmful? I'm particularly
> interested in whether the actual messages are being replicated to
> amq-node-2 or we are just seeing the increased number due to metadata being
> replicated. And is there something we could do differently to avoid this?
>
> Thanks
>
> f
>
>
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-- 
*Christian Posta*
http://www.christianposta.com/blog
twitter: @christianposta

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