[rabbitmq-discuss] Unacked messages going back in the queue

[Tim Watson]

Hi Pierpaolo!

On 03/22/2013 08:11 AM, Tim Watson wrote:
> If the channel is disappearing (because rabbit considers the connection to have dropped) then I would suggest configuring heartbeats in your client too ensure the connection stays alive.

Someone just kindly pointed out that you're using 3.0.4 - which means my 
advice isn't all that helpful as the server will negotiate heartbeats 
with the client by default (and pika has support for heartbeats). So my 
suspicion, is that if un-acked messages are disappearing and the client 
has not rejected them, that the connection must have been
disrupted somehow (network failure, packet loss, ?) causing the broker 
to re-queue them, or the consumer must have crashed or a channel error 
generated. Is there anything in the logs to indicate what might be 
happening?

Cheers,
Tim