[rabbitmq-discuss] upgrading message consumers

[Matthias Radestock]

Petar,

On 07/10/11 09:48, Petar Shomov wrote:
> I have a message that takes relatively long to process. I have a few
> instances of this message consumer running and processing messages. Next
> I have a new version of the consumer that I would like to deploy. I
> would like to upgrade the consumers (one by one or all at the same time,
> not a big difference to me) without crashing whatever they might be
> doing at the moment. Are there any best practices around this process?
>
> I was thinking about writing a file in a well known location which each
> consumers will check for after they are done processing a message and
> before they accept the next one. Something along those lines.
>
> Any ideas are welcome!

Use rabbit! ...to broadcast a message to the consumers telling them to 
stop/upgrade.

Matthias.