[rabbitmq-discuss] Load Balanced Consumers?

James Carr james.r.carr at gmail.com
Sun Aug 14 23:40:56 BST 2011

I actually observed some odd behavior on this setup Friday. I began
publishing through the load balancer (which load balanced to node1 and
node2) while I fired up a consumer that was connected to the same
queue on node1 and node2. I got messages from both nodes in the
consumer and decided to take one node off the cluster to see what
happened. It appears that when I brought one node down the other node
was also taken down and didn't return until I brought the other node
back up. I also couldn't stop nodes using rabbitmqctl stop_app as it
never completed and I resorted to a hard stop (killing the rabbitmq

I'm going to experiment more tomorrow, but so far it seems that I
cannot have a cluster running reliably when messages are being
published. I'll provide more details as I get them (I'm betting I did
something moronic configuring the cluster, boo).


On Fri, Aug 12, 2011 at 1:02 PM, James Carr <james.r.carr at gmail.com> wrote:
> Hi All,
> In all the material I've read on clustering and load balancing the
> setup I always see is publishers publishing through a load balancer
> while consumers consume all the nodes on the cluster.
> Is it possible to place the consumers behind a load balancer? I'm just
> asking, we plan on trying it on Monday with our cluster at work. The
> setup we're thinking of is one balancer for publishers, two for
> consumers (which consumers will consume on both) and divide the
> cluster into segments that the consumer balancers forward to.
> Is this an ideal solution? The only problem comes when the nodes that
> both connect to go down at the same time but I am putting money on
> that not happening. We'll see. :)
> Thanks,
> James

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