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Date: Mon, 28 Feb 2011 10:45:30 -0800 (PST)
From: Joe Smith <joesmithcomm@yahoo.com>
Subject: Re: Connection Re-balance Question
To: users@activemq.apache.org
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Hi Gary,

Thanks for the reply.  I've tried to attach the activemq.xml - for some reason 
it's been filtered out.  I do have the updateClusterClientsOnRemove="true" 
attribute on the transport connector.  Sorry I did not list it in the original 
email.

Here is the snippet.

Broker 1:

<networkConnector uri="static://(tcp://host2name:62616)"  
conduitSubscriptions="false"/>

<transportConnector name="openwire" uri="tcp://0.0.0.0:61616" 
updateClusterClients="true" rebalanceClusterClients="true" 
updateClusterClientsOnRemove="true"/>


Broker 2:

<networkConnector uri="static://(tcp://host1name:61616)"  
conduitSubscriptions="false"/>

<transportConnector name="openwire" uri="tcp://0.0.0.0:62616" 
updateClusterClients="true" rebalanceClusterClients="true" 
updateClusterClientsOnRemove="true"/>

Will take a look with the code.  Not sure which module triggers the re-balance.

Thanks, again


________________________________
From: Gary Tully <gary.tully@gmail.com>
To: users@activemq.apache.org
Sent: Mon, February 28, 2011 7:28:49 AM
Subject: Re: Connection Re-balance Question

Just had a peek at the code[1], you need to add
updateClusterClientsOnRemove="true" to your transport connector.

It looks like the cluster info is not aware of the broker failure
(node removal) and as a result does not update then it joins again.

org.apache.activemq.broker.region.RegionBroker#removeBrokerInClusterUpdate
[1] 
http://svn.apache.org/viewvc/activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/RegionBroker.java?view=markup


On 25 February 2011 22:14, Joe Smith <joesmithcomm@yahoo.com> wrote:
> Hi,
>
> I'm using the 5.4.x transport's updateClusterClients="true"
> rebalanceClusterClients="true"  options.
>
>
> It works fine as a broker is added to the cluster - the existing connections 
>are
> rebalanced.
>
>
> When a broker that's already in the cluster when down, the connections failed
> over successfully to the other broker (clients are using failover://). 
> However,
> when I bring up the failed broker, the connections on the other broker are not
> re-balanced.
>
> My questions are:
>
> 1. Does connection re-balancing work in this scenario - where a known broker 
in
> the cluster comes back on line after a crash?
>
> 2. What criteria need to be met before re-balance would occur other than when 
a
> NEW (vs. existing) broker is added to the cluster?  E.g. we have only 24 
client
> connections, is that too low?
>
> We tried both 5.4.1 and 5.4.2. Linux. JVM is 1.6.
>
> Thanks for the help.
>
>
>


-- 
http://blog.garytully.com
http://fusesource.com


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