Michal Toth created ARTEMIS-1244:
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Summary: [mqtt] Retain flag of received message is lost (caught by
outgoing interceptor)
Key: ARTEMIS-1244
URL: https://issues.apache.org/jira/browse/ARTEMIS-1244
Project: ActiveMQ Artemis
Issue Type: Bug
Components: MQTT
Affects Versions: 2.1.0
Reporter: Michal Toth
Priority: Minor
Upstream test:
[https://github.com/michalxo/activemq-artemis/commit/119e90c6c5bd2ae523e01368544ae3cb66987c4a#diff-d2a66663368a8238bae6dc85ccbd5a5d|org/apache/activemq/artemis/tests/integration/interceptors/MQTTInterceptorPropertiesTest.java]
Asked for PR.
While implementing an upstream test and checking MQTT Outgoing interceptor, I
have noticed that retain flag set to true is being lost when sending message
out.
However I did not manage to get information about this specific in [3.3.1.3.
Retain|http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Toc398718038].
On the other hand I have found a sentence in
[HiveMQ|http://www.hivemq.com/blog/mqtt-essentials-part-8-retained-messages]
part 8 article:
{quote}
Also the subscribing client can identify if a received message was a retained
message or not, because the broker sends out retained messages with the
retained flag still set to true.
{quote}
So after all this might be a matter of implementation. (feature enhancement or
rejected bug)
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