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Subject: [OASIS Issue Tracker] Updated: (MQTT-19) How Retained publications are deleted.
[ http://tools.oasis-open.org/issues/browse/MQTT-19?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Banks updated MQTT-19:
-----------------------------
Proposal: A PUBLICATION packet with a retain flag set to 1 and a payload containing zero bytes will be processed as normal by the server and sent to clients with a subscription matching the topic name. Additionally any existing retained publication for the topic name will be removed and any future subscribers for the topic will not receive a retained publication. As normal means that the retained bit is not set in the message received by existing subscribers. (was: A PUBLICATION packet with a retain flag set to 1 and a payload containing zero bytes will be processed as normal by the server and sent to clients with a subscription matching the topic name. Additionally any existing retained publication for the topic name will be removed and any future subscribers for the topic will not receive a retained publication. )
> How Retained publications are deleted.
> --------------------------------------
>
> Key: MQTT-19
> URL: http://tools.oasis-open.org/issues/browse/MQTT-19
> Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
> Issue Type: Improvement
> Components: core
> Reporter: Andrew Banks
>
> There specification suggests that a retained message published with a zero byte payload can be used to cause a retained message to be deleted by the server, although it
> leaves this behavior as optional. It is not clear whether the zero length message should be sent to subscribers.
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