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From "Nakarikanti, Nageswara" <>
Subject RE: Failover, how does it work?
Date Mon, 28 Mar 2011 22:06:13 GMT
And, adding  my question...

When Master Broker goes down, is there any way that administrators get a notification(e-mail
etc...) that it went down.

Should Only a "manual" restart to bring it up again?

Thank You,

-----Original Message-----
From: Timothy Bish [] 
Sent: Thursday, March 24, 2011 10:32 AM
Subject: Re: Failover, how does it work?

On Thu, 2011-03-24 at 13:27 +0100, Oscar Pernas wrote:
> Hi all (again),
> Im trying to understand well, how the failover transport works. I know 
> that if you have an active-pasive architecture and your active broker 
> goes down, all messages are send to the pasive broker. But, for 
> example, if we have a machine that have configured an active-pasive 
> brokers configuration like
> this:
> failover://(tcp://localhost:61616,localhost2:61616)?randomize=false
> If you remove the ethernet network cable, this machine couldnt connect 
> to any broker, but if I plug-in the cable again, to which broker the 
> connection will be stablished? if is developed like a pooling, could 
> really happen that this machine connect to the pasive broker instead to the first one?
> If this could happen, what is the usual way to change this machine to 
> the active? Im using activemq-cpp.

The slave broker won't accept connections until it becomes the master so the client won't
connect to a slave.  It will just keep moving through the list of URI's attempting to connect
until a broker becomes available.


Tim Bish
Twitter: tabish121

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