[rabbitmq-discuss] detecting publish failure across restart

Sat May 29 17:31:49 BST 2010

Hi Sylvain -

Thanks for your response.

In my case, I am publishing the messages with the mandatory flag set to 
true and I am registering a ReturnListener with the channel. However, I 
do not see any messages being returned. For what it's worth, I do see 
messages returned if I set the immediate flag to true and do not have a 
consumer running, but that's a different scenario.

Jesse

On 5/29/10 1:12 AM, Sylvain Hellegouarch wrote:
> Hi Jesse,
>
>
>     I understand that publishing a message is asynchronous, but surely
>     there
>     must be a way to discover that message was not successfully
>     published. What
>     am I missing?
>
>
>
>
> The protocol (I assume 0-8 here) suggests that you set the "mandatory" 
> flag to 1 for each message. If a message cannot be routed from an 
> exchange to at least one queue, it'll be returned to the publisher 
> with a "312 unroutable" error code. You must define a handler for 
> those errors on the publisher side [1] and decide what to do with the 
> returned message. Personally I just keep trying publishing it with 
> after a small period of time. This means my publisher becomes 
> responsible for not losing messages in that specific use case.
>
> -- 
> - Sylvain
> http://www.defuze.org <http://www.defuze.org/>
>
> [1] http://www.rabbitmq.com/api-guide.html#returning
>
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