[rabbitmq-discuss] Problem after upgrading to 2.3.1

[Matthew Sackman]

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,

Matthew