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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:
------------------------------
Description:
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.
was:
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.
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 linst starting at line 555:
add to line 557 and 558 ", or where transmission to the client has not yet been started"
was:
If a client connects using CleanSession=0:
- the client and server MUST store qos 1 and qos 2 messages, including those new messages due to active subscriptions on the server
- the client and server MAY discard existing and new QoS 0 messages
restructured proposal to fit narrative, previously read:
If a client connects using CleanSession=0:
- the client and server MUST store qos 1 and qos 2 messages, including those new messages due to active subscriptions on the server
- the client and server MAY discard existing and new QoS 0 messages
> 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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