[rabbitmq-discuss] cannot redeclare exchange with different type

Sid Young sid.young at gmail.com
Thu Dec 19 00:20:09 GMT 2013

I have been exploring fanout exchanges for a few nights as part of a stock 
graphing system I'm writing and in the process of recreating the exchange 
numerous times via my c++ programs, it appears once created, you need to 
delete it before redefining it as a different type.


On Wednesday, December 18, 2013 8:01:18 AM UTC+10, Roatin Marth wrote:
> g'day folks,
> just been rummaging through the rabbit mq tutorials and got myself stuck 
> in a slight rut.
> i'm perusing the pub/sub example in python on windows. 
> i've declared an exchange, and having run the script, I can see it's been 
> created through the management console,
> but I keep getting an exception as soon as I run either the producer or 
> the consumer app.
> if I comment out the exchange_declare line, all is well.
> the logger says I cannot redeclare an exchange with a different type.
> in the management window I can see it is of type fanout. the code is 
> declaring it as fanout.
> I was under the impression exchange_declare was idempotent. is this 
> correct?
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