jenmalloy commented on a change in pull request #532: DISPATCH-1381: Create
procedure for handling undeliverable messages
URL: https://github.com/apache/qpid-dispatch/pull/532#discussion_r301689181
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File path: docs/books/user-guide/routing.adoc
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@@ -551,6 +551,88 @@ autoLink {
For information about additional attributes, see
link:{qdrouterdConfManPageUrl}#_autolink[autoLink] in the `qdrouterd.conf` man
page.
--
+=== Handling Undeliverable Messages for an Address
+
+You handle undeliverable messages for an address by configuring _fallback
destinations_.
+A fallback destination is a queue on a broker that stores messages that are
not directly routable to any consumers.
+
+During normal message delivery,
+{RouterName} delivers messages to the consumers that are attached to the
router network.
+However, if no consumers are reachable,
+the messages are diverted to any fallback destinations that were configured
for the address.
+When a consumer reconnects and becomes reachable again,
+it receives the messages stored at the fallback destination.
+
+[NOTE]
+====
+{RouterName} does not preserve delivery order for messages stored at a
fallback destination. When a consumer reconnects, it will receive the stored
messages interleaved with any new messages sent by producers.
+====
+
+.Prerequisites
+
+* The router is connected to a broker.
++
+For more information, see xref:connecting-to-external-amqp-containers-router[].
+
+.Procedure
+
+This procedure enables fallback for an address
+and configures autolinks to connect to the broker queue
+that provides the fallback destination for the address.
+
+. Enable fallback destinations for the address.
Review comment:
Change the period to a colon? (I realize this is a stylistic element that
might conflict with the rest of the docs)
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