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https://issues.apache.org/jira/browse/ARTEMIS-1272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16081539#comment-16081539
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ASF GitHub Bot commented on ARTEMIS-1272:
-----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/activemq-artemis/pull/1389
> Artemis incorrectly handle MQTT acknowledgement
> -----------------------------------------------
>
> Key: ARTEMIS-1272
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1272
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: MQTT
> Affects Versions: 1.5.3, 2.1.0
> Reporter: Odyldzhon Toshbekov
>
> When MQTT client send acknowledgement Artemis acknowledge previous sent
> messages.
> Test case:
> 1. Connect to Broker (client 1)
> 2. Connect to Broker (client 2)
> 2. Send two messages with QOS = 1
> 3. Send acknowledgement for second message
> A.R. Artemis will remove from queue first and second message
> E.R. Artemis should remove only second message
> 4. Send acknowledgement for first message
> A.R. WARN message "attempted to Ack already Ack'd message"
> The cause of the problem located in the class MQTTPublisherManager methods
> "handlePubRec", "handlePubComp", "handlePubAck" and "sendMessage"
> Fix: replace "session.getServerSession().acknowledge" to
> session.getServerSession().individualAcknowledge
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