[rabbitmq-discuss] when are auto_delete queues actually deleted?

[Matthias Radestock]

Gojko,

Gojko Adzic wrote:
> so this is a bug then?
> 
> -bash-3.2# rabbitmqctl list_queues name auto_delete consumers | grep 0$
> amq.gen-v6OnaGmZrKj3vDNWy3B0pA==        true    0
> amq.gen-meDIMMmWVzZlgNIYmWySJg==        true    0
> amq.gen-+kWwe8PtGrO/4AtsqwzqJg==        true    0
> amq.gen-0vOWLk96SDEWD6rcLG9H1A==        true    0
> amq.gen-FFEHkUo6lzYTmvXXt2evSg==        true    0
> amq.gen-Z8Ob8BZDJFBNPXoN7oyV4g==        true    0
> amq.gen-1d9lXsBZwiTM/tVG3cUcug==        true    0
> amq.gen-OyEzVIng+Z8LgXaF/sXTlA==        true    0
> amq.gen-Vl3QAu0kbw+WJYZJSrsq3g==        true    0
> amq.gen-ayBsF3TVUrB/gziaeFd6gg==        true    0
> amq.gen-hSiCo7cXHduxIWhKm+/6UA==        true    0
> amq.gen-EzUDC0tIlDbS7lmSgiNxAQ==        true    0
> amq.gen-dZHzHom4n7Az7yZDdjhuQA==        true    0
> amq.gen-6Le+Ex6JhIpR32JOCSbPEQ==        true    0

A chose my words carefully: "auto_delete queues are deleted when the 
*last consumer disappears*". In other words it's the event of the last 
consumer disappearing that triggers auto-deletion, not the fact that 
there are no consumers. An auto-delete queue that has not had any 
consumers does survive. It has to, since it would have to be deleted 
straight after creation otherwise. I suspect the queues listed above 
have never had any consumers.


Regards,

Matthias.