[OASIS Issue Tracker] (MQTT-539) TopicId in PUBACK is superfluous

[ https://issues.oasis-open.org/browse/MQTT-539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Simon Johnson updated MQTT-539:
-------------------------------
    Priority: Trivial  (was: Major)

> TopicId in PUBACK is superfluous
> --------------------------------
>
>                 Key: MQTT-539
>                 URL: https://issues.oasis-open.org/browse/MQTT-539
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: MQTT-SN
>    Affects Versions: MQTT-SN-1.2
>            Reporter: Ian Craggs
>            Priority: Trivial
>
> Via Tomoaki Yamaguchi. "The topicId in the PUBACK packet makes the gateway implementation complicated. The msgId in PUBACK is enough for the client to handle the response."
> This also makes the PUBACK different to the PUBREC, PUBREL and PUBCOMP. Perhaps this was for the purpose of reporting errors as these three acks also lack a return code field (which will be dealt with in another issue).



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