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From "Bruce Snyder" <bruce.sny...@gmail.com>
Subject Re: gracefully stop ActiveMQ in a network of broker
Date Tue, 11 Nov 2008 19:50:02 GMT
On Tue, Nov 11, 2008 at 12:40 PM, yinghe0101 <yinghe0101@yahoo.com> wrote:
>
> hi, All,
> first, I have a question. the setup I have is two pair of master/slave
> running on different machines.
> When I use activemq-admin.bat stop --jmxurl to stop one master, what happens
> to the pending message in the queue on this stopped broker?
>
> I have a requirement that when we need to maintain the server that hosts a
> broker, we want to stop one broker in a way that it first stops accepting
> new messages, then it forwards its pending queue messages to the other
> broker and when all the pending messages are forwarded. it will stop its
> network connector.
>
> Is there any way to achieve the above? or I have to change the source to do
> this.

Per the master/slave doc on the ActiveMQ website
(http://activemq.apache.org/masterslave.html#MasterSlave-HowPureMaster/Slaveworks):

'The master broker will only respond to a client when a message
exchange has been successfully passed to the slave. For example, a
commit
in a clients transaction will not complete until the master and the
slave have processed the commit.'

I also have a question for you - are the messages persistent? If so,
the messages will be persisted on both the master and the slave.

Just note that failback must be achieved manually as noted in the
following doc:

http://activemq.apache.org/masterslave.html#MasterSlave-RecoveryingaMasterSlavetopology

Bruce
-- 
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);'

Apache ActiveMQ - http://activemq.org/
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