Gordon Sim created DISPATCH-510:
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Summary: handle amqp:link:redirect
Key: DISPATCH-510
URL: https://issues.apache.org/jira/browse/DISPATCH-510
Project: Qpid Dispatch
Issue Type: Improvement
Reporter: Gordon Sim
To scale a topic, multiple brokers can be connected to a router network, and
subscriptions can be spread out over these (some form of forwarding between
brokers is needed also). Subscribers are then link routed through the router
network to one of the brokers. However for durable subscribers, they need to be
rerouted back to the same broker when they reconnect. This requires locating
the right broker, One option for this is to initially route the link to a
locating service that queries the brokers to determine the right target. That
service can then issue a link redirect, specifying a qualified address that
will reach the right broker.
Though clients can be written to handle this redirection, it would be
convenient if the router was able to do this transparently.
In other words, when link routing a link, if the target node for the link
detaches with an amqp:link:redirect error, specifying a different 'address' in
the 'info' field of the error, the router could re-route the link to the new
address.
This pattern could be used for other use cases as well I suspect so could be a
nice addition to the link routing capability.
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