[jira] [Created] (ARTEMIS-6164) support mqtt retain messages in a mirror of address federation

["Gary Tully (Jira)" <ji...@apache.org>]

Gary Tully created ARTEMIS-6164:
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             Summary: support mqtt retain messages in a mirror of address federation
                 Key: ARTEMIS-6164
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-6164
             Project: Artemis
          Issue Type: New Feature
          Components: mirror, AMQP, Federation, MQTT
    Affects Versions: 2.55.0
            Reporter: Gary Tully
            Assignee: Gary Tully


For a pub/sub use case, where publishers get HA and consumers are partitioned a federation or mirror can provide a two way bridge for published messages. If there is little variability a mirror that always published works well and for something demand driven, address federation is better.

MQTT retained messages are ignored in both cases. Having a retain queue federation or mirror gets complicated quickly and can lead to duplicates.

Having the mirror or federation receiver act on retain messages (because they are always published in the normal way) provides a viable solution. 



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