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Subject: [OASIS Issue Tracker] Updated: (MQTT-7) Can the client and server store QoS=0 messages after a client using CleanSession=0 has disconnected?


     [ http://tools.oasis-open.org/issues/browse/MQTT-7?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Richard Coppen updated MQTT-7:
------------------------------

    Proposal: 
From line 541 in WD11

Line 544: restructure the last sentence to say "After disconnection, the Server MUST accumulate further QoS 1 and QoS 2 messages that match any subscriptions that the client had at the time of disconnection". Add a sentence to say  "It MAY accumulate QOS 0 messages that meet the same criteria"

in the list starting at line 555:

add to line 557 and 558 ", or where transmission to the client has not yet been started"

  was:
From line 541 in WD11

Line 544: restructure the last sentence to say "After disconnection, the Server MUST accumulate further QoS 1 and QoS 2 messages that match any subscriptions that the client had at the time of disconnection". Add a sentence to say  "It MAY accumulate QOS 0 messages that meet the same criteria"

in the linst starting at line 555:

add to line 557 and 558 ", or where transmission to the client has not yet been started"


> Can the client and server store QoS=0 messages after a client using CleanSession=0 has disconnected?
> ----------------------------------------------------------------------------------------------------
>
>                 Key: MQTT-7
>                 URL: http://tools.oasis-open.org/issues/browse/MQTT-7
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: core
>            Reporter: Andrew Banks
>
> Can the client and server store QoS=0 messages after a client using CleanSession=0 has disconnected
> or must these messages be discarded. If they must be discarded then a temporary network outage will unnecessarily cause Qos=0 messages to lost.

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