[rabbitmq-discuss] A question on federation status reporting

Mon Jan 13 18:21:28 GMT 2014

Hi Matt.

Federated exchanges declare queues for internal use. These are the 
queues with names beginning "federation: " which you have probably 
already seen.

It looks like in your case those internal queues are themselves becoming 
federated. This is unlikely to be a useful thing.

You should review your federation policies and make sure those queues 
are not included in them. If you don't intend to federate queues at all 
then the easiest way is to set the federation policy to only apply to 
exchanges.

I'll also file a bug to prevent those queues from ever federating, 
regardless of policy...

Cheers, Simon

On 13/01/2014 18:08, Matt Pietrek wrote:
> We have a bi-directional federation setup between three nodes like this
> on RabbitMQ 3.2.2:
>
> mq_integ/sea <===> mq_integ <===> mq_integ/tuk
>
>
> All three nodes use a "skytap" exchange and the mq_integ/sea
> and mq_integ/tuk are *_not_* federated with each other
>
> Here's what's interesting. In the *mq_integ/sea* broker, the "Federation
> Upstreams" page is what I'd expect it to be, that is, a connection to
> mq_integ:
> Name	URI	Expiry	Message TTL	Max Hops	Prefetch Count	Reconnect Delay
> Ack mode	Trust User-ID
> upstream-integ
> <http://tuk5r1mq1.mgt.integ.skytap.com:15672/#/federation-upstreams/%2F/upstream-integ>
> amqp://foo:bar@sea_m2:5672						?	?
>
>
> However, in the "Federation Status" page for *mq_integ/sea* looks
> strange (see below). In particular, I see four entries, whereas in
> RabbitMQ 3.0.2 I only saw one line.
>
> In addition, the third entry references the mq_integ/tuk broker, even
> though I haven't configured mq_integ/sea to know anything about
> mq_integ/tuk:
>
>
> Connection	URI	Exchange / Queue	Node	State	Inbound message rate	Last
> changed
> upstream-integ	amqp://sea_m2:5672	federation: skytap -> mq_integ_queue
> rabbit at sea_r2	
> running
> 		2014-01-11 1:35:28
> upstream-integ	amqp://sea5_m2:5672	federation: skytap ->
> mq_integ/sea_queue 	rabbit at sea_r2	
> running
> 		2014-01-11 1:35:28
> upstream-integ	amqp://sea_m2:5672	federation: skytap ->
> mq_integ/tuk_queue 	rabbit at sea_r2	
> running
> 		2014-01-11 1:35:29
> upstream-integ	amqp://sea_m2:5672	skytap_exchange 	rabbit at sea_r2	
> running
> 	0.00/s	2014-01-11 1:35:29
>
>
> Is this what you'd expect to see? Am I not understanding something?
>
> Thanks,
>
> Matt
>
>
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