[rabbitmq-discuss] Clustering Internals

Jason J. W. Williams jasonjwwilliams at gmail.com
Wed Mar 23 16:14:34 GMT 2011

So mandatory or not, the channel doesn't release the publisher until it's
routed the message? So if a node crash were to occur while a message was
being routed the publisher could assume the message was lost because the the
publisher would still be waiting to be released when they lost connection?

My understanding previously was that when you publish it's fire-and-forget
while the routing occurs...you're instantly released while the routing is in


On Wed, Mar 23, 2011 at 6:36 AM, Matthew Sackman <matthew at rabbitmq.com>wrote:

> On Tue, Mar 22, 2011 at 06:06:43PM -0600, Jason J. W. Williams wrote:
> > So there really are no guarantees as to the contents of an exchange on
> > failure of a node. You can just be sure that the exchange will exist as
> > expected on the other nodes.
> It's wrong to think of an exchange as having "contents". An exchange
> really just names a collection of routing rules (i.e. bindings). At no
> point is a message ever held "in" an exchange.
> But otherwise, yes, exchanges just exist on every node, but the bindings
> of that exchange will vary dynamically with the actions of clients and
> the failure or restoration of nodes within the cluster.
> Matthew
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