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From crazysoumya <>
Subject ActiveMQ loadbalancing in Mule ESB
Date Thu, 23 Aug 2012 14:03:07 GMT
I have an issue with ActiveMQ loadbalancing with Mule. I am using Mule 3.2.0
and ActiveMQ 5.5.1

I have a Mule FLow application which uses JMS inbound Endpoint to listen to
queues in ActiveMQ. I have 2 instances of AMQ running each having a queue
called "MyQueue". Lets name them AMQ1 and AMQ2. I also have 2 mule instances
running - each having the same app. Let's name them Mule1 and Mule2.

Now I want each mule instance to pick up messages from either of the AMQ
queues. So say a Message Sender sends the message to the queue MyQueue in
either AMQ1 or AMQ2 (Message sender load balances using failover transport
supported by ActiveMQ - and that bit works fine). Say it reached AMQ1. Now
ideally I would like to have 10 consumers each of Mule1 and Mule2 registered
in each AMQ instance. So both of them are listening for incoming messages in
both the queues. One of them should pick up the message from the queue and
process it.

This is the config I am using in Mule to connect to both the AMQ brokers.

  <jms:activemq-connector name="Active_MQ" 
eagerConsumer="true" numberOfConsumers="10" dynamicNotification="true"
validateConnections="true" clientId="MuleInstance1"  doc:name="Active MQ">
      <reconnect count="5" frequency="3000" blocking="false"/>

kindly note clientId is different for different Mule instances. Also
currently AMQ 1 and Mule1 share the same machine and AMQ2 and Mule2 share
another machine.

However I am noticing soem random behaviour. AT times all consumers(both of
Mule1 and Mule2) register only to one AMQ instance. At times Mule1 is
registering only to AMQ1 and Mule 2 to AMQ2. What ideally I want is
cosnumers of both Mule1 and Mule2 to register to both AM1 and AMQ2 I
followed the instructions here

Basically I wanted to use the network of broker architecture so that there
is no loss of service whether a Mule instance or AMQ instance goes down or
has to be restarted. Not sure the randomize=true query param in helping in
this case.

Can someone kindly advise how to achieve the above using Mule 3.2.0 and
Active MQ 5.5.1?

If there isn't a solution sadly I may have to make Mule1 listen to AMQ1 and
Mule2 listen to only AMQ2 and it won't really be clustered :(

Thanks in advance.

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