[rabbitmq-discuss] Fwd: Excessive memory consumption of one server in cluster setup

Mon Aug 27 21:44:36 BST 2012

See comments inline

Thanks
Matthias

On Mon, Aug 27, 2012 at 5:22 PM, Matthias Radestock
<matthias at rabbitmq.com>wrote:

> Matthias,
>
>
> On 27/08/12 16:02, Matthias Reik wrote:
>
>> even though the setup looks slightly differently (since we are not
>> using the shovel plugin), the reason could be the same. We are
>> explicitly ACKing the messages (i.e. no auto-ack), even though the
>> consumers are in the same data-centers (so we should have a reliable
>> network), but if the acks are lost and that causes memory increase in
>> the server then it could be the same bug.
>>
>
> As noted in my analysis, the bug has nothing do with the shovel, or
> consuming/acking - simply publishing to HA queues when (re)starting slaves
> is sufficient to trigger it.

Wasn't sure I understood it 100% correctly (sorry not too experienced with
RabbitMQ yet). Thx for the confirmation.

>
>
>  Is there anything I could do to validate this assumption?
>>
>
> I don't think it's worth the hassle. I am quite certain that you are
> suffering from the same bug.

 OK, if you expect a fix for the issue to appear soon then I could wait
with with "fixing" the cluster and try out any updated version. If it will
take more time, then I will probably go for your (below) suggested
fix/workaround.

>
>  Is there anything I can do in the meantime to get into a state where I
>> have a working cluster again
>>
>
> Pause all publishing before (re)starting any cluster nodes.
>
Yes, that makes sense.

Thank you for your quick response.

>
> Regards,
>
> Matthias.
>
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