Topics("$sys.mqtt.retain.xxx") sent a MQTT retained message are not automatically deleted even if messageCount=0

Solution Verified - Updated -

Issue

  • Topics("$sys.mqtt.retain.xxx") sent a MQTT retained message are not automatically deleted even if messageCount=0, such as when the message expires or a zero-length payload is sent.

Environment

  • Red Hat AMQ Broker 7.9

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