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From ttmdev <>
Subject Re: Networked brokers and durable bridges
Date Wed, 21 Nov 2007 04:33:47 GMT

You may want to consider "Virtual Topics" as a workaround and good
alternative to durable topic subscriptions. Go to this page to find out more
about Virtual Topics and see "Why JMS Durable Topics Suck" d:)


Bidimus wrote:
> I'm working with a configuration of three networked brokers each with a
> bridge to the other two.  The purpose is to provide redundancy as well as
> load balancing.
> It works as expected for Queues and non-durable topic subscriptions.
> Durable topic subscriptions though seem to be exhibiting a problem and I'm
> not sure if it's the release I'm using or a configuration problem.  When a
> durable subscription is made, durable subscriptions are made across the
> bridge on the other two brokers.  When the durable subscription is
> destroyed though, the two durable bridges aren't destroyed with it.
> I'm currently running the 5.0 snapshot from 10-23-2007.  This is necessary
> as I've found leaks and other issues with all of the 4.x releases.
> My configurations look esentially like this:
>    <transportConnectors>
>        <!-- <transportConnector name="openwire"
> uri="tcp://localhost:61616" discoveryUri="multicast://default"/> -->
>        <transportConnector name="openwire" uri="tcp://localhost:61618" />
>     </transportConnectors>
>     <!-- The store and forward broker networks ActiveMQ will listen to -->
>     <networkConnectors>
>       <networkConnector name="bridge"
> uri="static://(tcp://localhost:61617,tcp://localhost:61616)"
> dynamicOnly="true" networkTTL="1" />
>     </networkConnectors> 
> With port numbers and broker names changed on each broker.
> Topics and subscriptions are made by the clients at run time.
> If this is expected behavior then is there a workaround for this scenario?
> Thanks in advance,
> - Jim

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