[rabbitmq-discuss] connection and consumer counts all wrong

Aaron Westendorf aaron at agoragames.com
Wed Feb 15 15:58:18 GMT 2012

I need to run reports to figure out which ports are diff'd between
client and server, then mine rabbitmqctl to see what it thinks. That's
on deck for the day but may take awhile or get pushed off in favor of
other needs.

We haven't enabled heartbeats because until recently, we weren't
guaranteed that we could timely acknowledge a heartbeat while also
handling a message. If heartbeats will rid us of any question, I'll
gladly turn them back on.


On Wed, Feb 15, 2012 at 10:22 AM, Simon MacMullen <simon at rabbitmq.com> wrote:
> Do you see these connections in rabbitmqctl / mgmt?
> Have you enabled heartbeats?
> Cheers, Simon
> On 15/02/12 15:17, Aaron Westendorf wrote:
>> We're regularly able to break rabbits tracking of consumer counts on a
>> queue, such that it says "X consumers" whereas the reality is "X - N
>> consumers" where N>0. This seems to be triggered by disagreement as to
>> the state of sockets, likely caused by an unclean disconnect by a
>> client. This could be caused by any number of things, such as
>> rebooting on of our client VMs or maybe just a connection drop inside
>> our providers network (a common and unwelcome event).
>> We've seen this problem on 2.5.1 + R14B01, and are continuing to see
>> it on 2.7.1 + R15B.  I can try to provide additional details on
>> request.
>> My concerns on consumer counts are two-fold. First, we have no way to
>> validate that num_procs==num_consumers, an important metric when
>> validating that our platform is running correctly. Second, we don't
>> know if rabbit is pushing messages to these ghost consumers, and if
>> so, what's happening to them.
>> -Aaron
> --
> Simon MacMullen
> RabbitMQ, VMware
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Aaron Westendorf
Senior Software Engineer
Agora Games
359 Broadway
Troy, NY 12180
Phone: 518.268.1000
aaron at agoragames.com

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