[rabbitmq-discuss] Problem after upgrading to 2.3.1

Matthew Sackman matthew at rabbitmq.com
Thu Feb 24 14:31:12 GMT 2011

On Thu, Feb 24, 2011 at 04:27:08PM +0200, mysurf mail wrote:
> reply-code=406,reply-text=PRECONDITION_FAILED - unknown delivery tag
> 1,class-id=60,method-id=80),null,""}

Older versions of Rabbit didn't error if you acked the same message
multiple times. Currenty versions do, in order to conform with the AMQP
0-9-1 spec. It's very likely you're acknowledging the same message
multiple times in order to get this error message.

Can you check your application to see if this is the case?

Best wishes,


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