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Subject: [OASIS Issue Tracker] Updated: (MQTT-10) Should Qos=0 retained messages be persisted in the server?

     [ http://tools.oasis-open.org/issues/browse/MQTT-10?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Richard Coppen updated MQTT-10:

The Server SHOULD retain QoS 0 messages, but MAY discard them at any time. In the latter case there will be no retained message.

Note to editors: 
For completeness, consider providing a link in Section "Retained" to  Section 4.1 "Store" to help reader with clarity around store.

Retained messages MUST be stored according to the server's capability to store messages as defined in the <new section on QoS and storage>.

Note to editors: non-section considered, however valid use cases exist for Qos 0 retained messages.

> Should Qos=0 retained messages be persisted in the server?
> ----------------------------------------------------------
>                 Key: MQTT-10
>                 URL: http://tools.oasis-open.org/issues/browse/MQTT-10
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 3.1.1
>         Environment: MQTT server
>            Reporter: Andrew Banks
>             Fix For: 3.1.1
> The current specification states that :
> Retained messages should be kept over restarts of the server.
> Is this correct even for Qos=0 retained publications?

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