<meta charset="utf-8"><span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 13px; "><div class="im" style="color: rgb(80, 0, 80); ">On Mon, Jul 18, 2011 at 10:02 AM, Matthias Radestock�<span dir="ltr"><<a href="mailto:matthias@rabbitmq.com" target="_blank" style="color: rgb(42, 93, 176); ">matthias@rabbitmq.com</a>></span>�wrote:<br>
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"absent" durable queues are only forgotten for routing purposes. RabbitMQ prevents re-creation of these queues since that would result in inconsistency when the node re-joins.<br><br>We could change things s.t. absent durable queues still participate in routing and that confirms return a 'nack' when messages are routed to such queues.<br>
</blockquote><div><br></div></div><div>It seems like that is the correct thing to do.</div><div class="im" style="color: rgb(80, 0, 80); "><div>�</div><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; ">
I am concerned though that there may be use cases where the current behaviour is the correct one.<br></blockquote><div><br></div></div><div>I am curious as to what that case may be. �A network partition in a cluster like RabbitMQ's is an error condition. �Thus, I expect the cluster to inform me of the error, not to silently go on as if nothing is wrong.</div>
<div><br></div><div>AMQP is often compared with SMTP, with exchanges acting as MTAs and with senders and receivers. �A topic exchange is akin to a distribution list. �Publisher submit to the list and the message is sent to subscribers. �If there are no subscribers, then the publisher will receive no errors. �But if there are subscribers, but their mailbox is unreachable, then the subscriber (or the MTA, depending on the configuration) will receive an error message. �</div>
<div><br></div><div>At the moment RabbitMQ is failing to generate those error messages, so I have no way of knowing whether the radio silence means there are no subscribers or the subscriber failed to receive the message, actually is worse, since I would actually get a publisher confirm ack, a positive response.</div>
<div><br></div><div>Elias Levy</div></span>