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Subject: [OASIS Issue Tracker] Updated: (MQTT-130) Qos=3 requested Qos, and Zero byte retained message

     [ http://tools.oasis-open.org/issues/browse/MQTT-130?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Banks updated MQTT-130:

Point 3, it is a deliberate restriction that the # wild card is allowed only at the end of the topic string.

> Qos=3 requested Qos, and Zero byte retained message
> ---------------------------------------------------
>                 Key: MQTT-130
>                 URL: http://tools.oasis-open.org/issues/browse/MQTT-130
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: edits
>            Reporter: Andrew Banks
> Subject: Some Comments
> From: Ian Craggs <icraggs@modelbasedtesting.co.uk>
> To: mqtt-comment@lists.oasis-open.org
> Date: Tue, 14 Jan 2014 15:00:41 +0000
> 1. If a requested QoS is 3 in subscribe, it is not clear whether this is a malformed packet which should cause the session to be terminated, or whether a suback should be returned with invalid request or lower granted QoS. (I think the first case is intended.)
> 2. When receiving a publish with the retained flag set and a payload of 0 length, it is clear that any existing retained message should be removed. But what if there is no existing retained message? In that case it is not clear if we set a retained message of 0 length, or not. (I expect not).
> 3. # wildcards used to be allowed at the beginning of topic filters as well as at the end. Is this a deliberate restriction?
> Ian

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