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From Eric Cheung <>
Subject Apollo MQTT QoS 2 issue
Date Wed, 05 Feb 2014 21:09:35 GMT

I am starting to use Apollo with MQTT, and in testing with Paho and
Mosquitto clients I am seeing something strange.  When publisher sends
PUBLISH with qos=2, Apollo changes it to qos=0.

       Publisher   Apollo   Subscriber

                      <-- SUBSCRIBE with qos=2
                      --> SUBACK

 PUBLISH qos=2 -->     --> PUBLISH qos=0
       PUBREC  <--
        PUBREL -->
        PUBCOMP <--

So Apollo is doing the exactly once exchange with publisher, but somehow
downgrades to at most once with the subscriber.  Am I doing something wrong

Thanks in advance
Eric Cheung

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