[rabbitmq-discuss] cannot redeclare exchange with different type
roatin.marth at gmail.com
Fri Dec 20 17:01:30 GMT 2013
i wasn't actually trying to change the type when i initially posted my
query. which is why i was confused.
based on the samples on the rabbit tutorials, i assumed the call to
declare_exchange was idempotent, meaning if it already existed, it wouldn't
try to recreate it.
in my example, i have an exchange "myExchange" of type fanout. my code was
simply ensuring this exchange existed by calling
when i ran my code the second time, it was giving me that error as if i was
trying to change the type.
i checked the management page and the exchange was there with type fanout.
after i deleted the exchange, the code worked as expected after subsequent
reruns of the app.
On Wednesday, 18 December 2013 19:28:45 UTC-5, Alvaro Videla wrote:
> Yes, to change queues and exchange parameters/types you need to delete
> them and redeclare them.
> > I have been exploring fanout exchanges for a few nights as part of a
> > graphing system I'm writing and in the process of recreating the
> > numerous times via my c++ programs, it appears once created, you need to
> > delete it before redefining it as a different type.
> > Sid
> > 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
> >> 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
> >> 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?
> > _______________________________________________
> > rabbitmq-discuss mailing list
> > https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
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