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From Steve Hill <>
Subject Re: Can ActiveMQ take advantage of Oracle transparent application failover?
Date Wed, 26 Apr 2017 15:07:16 GMT
I have not used oracle rac but it sounds like active mq is tied to a single instance rather
than any available oracle server. Have you considered putting a load balancer in front that
can determine whether the back end is up and can route requests appropriately?  Not sure if
this would work as not had prior experience .


> On Apr 26, 2017, at 9:08 AM, "" <> wrote:
> Tim,
> Thanks for the detailed reply. I will share with our app design/development
> team for more in-depth discussion and post back with status on any
> workarounds or coding we come up with. 
> Also, may consider entering a feature request as you suggested. Agree it may
> be a bigger update than team wants to tackle but if nothing else it may stir
> some more discussion and brainstorming.
> I've got to believe someone somewhere has had the same architecture with
> similar problem as follows:  Oracle RAC, Active MQ slave/master - take down
> one node of the RAC (for maintenance or unexpected problem) and Active MQ
> survives on the remaining node.
> Just to clarify, I believe the slave broker didn't acquire the lock because
> it appears both master and slave were still pointed to the Oracle RAC node
> that was taken down for maintenance (node 2 was left up and we expected
> Active MQ to connect to the DB though that node.  We’re using an Oracle SCAN
> Listener - Single Client Access Name).  After we did maintenance, and
> rebooted node 1 of the RAC, the Active MQ was back and live (on that node). 
> So... may be able to do some scripting and redirecting from the Oracle side
> when a RAC nodes goes down... we'll see.
> Again, thanks.  You or anyone else with more suggestions or experiences to
> share, be glad to hear and keep the thread alive.
> Thanks,
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