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Subject: [OASIS Issue Tracker] Commented: (MQTT-42) Clean session and random client ids

    [ http://tools.oasis-open.org/issues/browse/MQTT-42?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=34608#action_34608 ] 

Andrew Schofield commented on MQTT-42:

I agree with the previous comment. Within the scope of the charter, we're not permitted to introduce an incompatible change, such as a special meaning for a zero-length ClientId on the CONNECT packet. I like that idea, but I think we can only go as far as the previous comment in this version of the specification.

> Clean session and random client ids
> -----------------------------------
>                 Key: MQTT-42
>                 URL: http://tools.oasis-open.org/issues/browse/MQTT-42
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 3.1.1
>         Environment: N/A
>            Reporter: Raphael Cohen
>            Priority: Minor
>             Fix For: 3.1.1
> Opened on behalf of Roger Light:-
> Hi,
> A lot of MQTT client libraries offer the feature of generating random
> client ids rather than having to supply one. This is good.
> I recently had over 10,000 client connections made to
> test.mosquitto.org using a random client id, but also having set clean
> session to false, which meant that when they disconnected their
> information was stored on the server but there was basically no chance
> they could reconnect.
> It would be nice to have a comment in the spec suggesting that
> implementations may offer to generate random client ids but that they
> must refuse to do so if clean session is set to false.
> Cheers,
> Roger

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