[MQTT-19] How Retained publications are deleted. - OASIS Technical Committees Issue Tracker

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Type: Improvement
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: 3.1.1
Fix Version/s: 3.1.1
Component/s: core
Labels:
None

Proposal:

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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.

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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.
Resolution:

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Fixed in WD10 line 372

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Fixed in WD10 line 372

Description

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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Assignee:

Unassigned

Reporter:

Andrew Banks (Inactive)

Watchers:

1 Start watching this issue

Dates

Created:

28/May/13 10:06 AM

Updated:

04/Oct/13 10:51 AM

Resolved:

15/Aug/13 4:26 PM