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From Marlon Santos <>
Subject Re: network of brokers
Date Fri, 29 Dec 2006 02:38:59 GMT


AFAIK, it's still supported. If you want to see the message flow, create a
publisher/producer on brokerA and have a consumer/listener on brokerB which
consumes the messages on the queue on brokerA. 

The messages are only distributed to other brokers or clients when there is
a request for the message on the queue. So you were not seeing the message
flow on your case because maybe you dont have a consumer/client requesting
for the message. 


activemqer wrote:
> I'm trying to achieve some kind of a load balancing in our project. I
> don't think that master/slave can solve that problem. It merely is a
> recovery mechanism, which is good but not good enough for me.
> Just to clarify the reason I'm posting this message. I read on the the doc
> page that ActiveMQ supports distributed queues and the way to achieve that
> is to use a network of brokers. Is this still true? Because I don't see
> messages flow between brokers even when I subscribe to a queue on a broker
> that does not currently have any messages. May be I'm just misinterpreting
> the documentation.
> John Heitmann wrote:
>>> It sounds like you may want to try out the master/slave feature  
>>> instead if you care about both 0 message loss during failure and that  
>>> a message must be consumed once and only once.
>> John
>> On Dec 28, 2006, at 7:32 AM, activemqer wrote:
>>> Hi,
>>> I'm trying to cluster two brokers on two separate machines. I'd  
>>> like to post
>>> messages to broker A and the messages to flow to broker B so I have  
>>> two
>>> brokers with same set of messages. I'd like this to be able to  
>>> failover from
>>> one broker to the other in case of an outage.
>>> The problem is I don't see the messages flow between the two  
>>> brokers, they
>>> stay in the broker A's persistant storage. I found in the  
>>> documentation that
>>> there is a way to enforce the message flow with the dynamicOnly set  
>>> to false
>>> but it did not make any difference. Am I missing anything?
>>> I have the following network connectors configured:
>>> * on host A:
>>> <networkConnector name="A and B" uri="static://(tcp://B:61616)"
>>> failover="true" dynamicOnly="false" networkTTL="10"/>
>>> * on host B:
>>> <networkConnector name="A and B" uri="static://(tcp://A:61616)"
>>> failover="true" dynamicOnly="false" networkTTL="10"/>
>>> One more detail, if it helps, when I'm posting messages to the  
>>> queue, there
>>> are no listeners on either broker.
>>> Thanks.
>>> -- 
>>> View this message in context: 
>>> brokers-tf2890777.html#a8076003
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