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https://issues.apache.org/jira/browse/ARTEMIS-2888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17187501#comment-17187501
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Florian Meister commented on ARTEMIS-2888:
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Hi Justin,
thanks for the quick feedback. I did a bit troubleshooting on weekend and
discovered that it does not occur when the queue is empty. I published a lot of
messages (around 9M) without subscribers. Today I tried to subscribe with a new
customer (new session) to the topic and voila - I get messages with the
wildcard topic in it. Maybe it has something to do with paging?
I'll get the logs for you now.
> MQTT spec violation when subscribed to wildcard topic
> -----------------------------------------------------
>
> Key: ARTEMIS-2888
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2888
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: MQTT
> Affects Versions: 2.14.0
> Environment: *Message Producer:*
> MQTTnet Client
> published Message to
> 0e5ed50e-ccea-4a42-8c3e-db0e2780222b/from-smart-acquisition-device/machine-state/event/off
>
> *Message Consumer:*
> MQTT Paho Java Client, also tested with HiveMQ Java Client.
> Subscribed to +/from-smart-acquisition-device/machine-state/event/off
> Reporter: Florian Meister
> Priority: Major
> Attachments: image-2020-08-27-12-37-01-479.png
>
>
> Sometimes the topic name of published messages contains the topic filter
> instead of the topic name.
> This is neither correct nor allowed in the MQTT 3.1.1 specification:
> [http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Toc398718106]
>
> Below a screenshot of an example MQTT Packet sent from the Artemis Broker
> !image-2020-08-27-12-37-01-479.png!
>
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