[rabbitmq-discuss] Entity creation order guarantees with shovel/federation

Mon Mar 5 10:07:31 GMT 2012

Thanks Simon, having that fixed would be great.

-----Original Message-----
From: Simon MacMullen [mailto:simon at rabbitmq.com] 
Sent: lunedì 5 marzo 2012 11:06
To: Busoli, Simone
Cc: rabbitmq-discuss at lists.rabbitmq.com
Subject: Re: [rabbitmq-discuss] Entity creation order guarantees with shovel/federation

Hi Simone.

Both shovel and federation create their entities when the rabbit_shovel or rabbit_federation applications start up - which is after the rabbit application. So yes, there is a race here. Hmm. This could probably be fixed fairly easily, I'll file bugs.

Cheers, Simon

On 05/03/2012 8:01AM, Busoli, Simone wrote:
> Hello, I would like to know if there are any guarantees about the 
> order in which entities like exchanges and queues are created when 
> they are declared in shovel or federation addins with respect to when 
> the broker becomes available for clients to connect.
>
> I had assumed that when the broker would start accepting connections 
> then the plugins were already initialized and the entities they 
> declare available.
>
> What I experienced instead is that after a broker shutdown some 
> clients where a reconnection logic was put in place randomly found the 
> exchanges they were trying to bound their queues to to not exist yet, 
> as if it depended on when exactly the client tried reconnecting.
>
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