Warnings when there are more than expected members in the cluster

["Page, Jeremy" <je...@gilbarco.com>]

I'm been running running ActiveMQ on AWS EC2 instances and have been investigating using Zookeeper to cluster it. Using 5.13.2 it's working but when I add more than the # specified in the replicas it complains.

Is this something I should worry about? I will normally have the right number of replicas but there will be times (deploying a new configuration) where there will be more. Is the impact more significant than just the warning?
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Re: Warnings when there are more than expected members in the cluster

[Tim Bain <tb...@alumni.duke.edu>]

As I understand it, Zookeeper bases certain decisions on whether the number
of actors taking a certain action is above or below a threshold that's set
based on the total number of actors, so I'd think that changing the number
of actors in the cluster might cause unexpected actions to be taken because
there are suddenly more than the expected number of actors (making it more
likely that you'll get over any particular threshold).  I'm not sure if
there would be any other negative consequences.

Tim

On Thu, Apr 7, 2016 at 11:55 AM, Page, Jeremy <je...@gilbarco.com>
wrote:

> I'm been running running ActiveMQ on AWS EC2 instances and have been
> investigating using Zookeeper to cluster it. Using 5.13.2 it's working but
> when I add more than the # specified in the replicas it complains.
>
> Is this something I should worry about? I will normally have the right
> number of replicas but there will be times (deploying a new configuration)
> where there will be more. Is the impact more significant than just the
> warning?
> Please be advised that this email may contain confidential information. If
> you are not the intended recipient, please notify us by email by replying
> to the sender and delete this message. The sender disclaims that the
> content of this email constitutes an offer to enter into, or the acceptance
> of, any agreement; provided that the foregoing does not invalidate the
> binding effect of any digital or other electronic reproduction of a manual
> signature that is included in any attachment.
>