Re: [mqtt-comment] Wildcard Subsriptions, QoS 1 / 2 optional

[André Freyssinet <andre.freyssinet@scalagent.com>]

Hello,

    I agree with Christohp and Roger, optional functions and QoS will 
reduce interoperability, complexify applications and have a negative 
impact on the use of MQTT.

Regards,
Andre.

PS: Some brokers like AWS MQTT already reduce QoS and the 
functionalities without negotiating with the client.

Le 19/03/2017 à 22:19, Roger Light a écrit :
> Hello,
>
> I agree with Christoph here as well, there should be some more
> consideration given to all of the optional options and whether they
> should be required or not.
>
> Regards,
>
> Roger
>
>
> On Tue, Mar 14, 2017 at 12:29 PM, c@ckrey.de <c@ckrey.de> wrote:
> > Dear committee members,
> >
> > Wildcard Subscriptions and QoS 1 and 2 have always been key features of
> > MQTT.
> >
> > You leave it to the decision of the broker implementors to make QoS 1 or QoS
> > 2 available.
> >
> > The existence of a Return Code "0xA2 Wildcard Subscription not support“
> > suggests that the
> > implementation of wildcard subscriptions is another „MAY“ for brokers.
> >
> > Would you include in the v5 specification a section were all features which
> > became optional compared to MQTT3.1.1.
> > And for the broader audience, it would be very helpful to understand why you
> > made such proposals.
> >
> > Please review your decision. Otherwise I see
> > - interoperability issues between applications and brokers (think bridging)
> > - more complex client applications
> > - a decrease in the use of MQTT
> >
> > Christoph Krey
> > <c@ckrey.de> 7582 9188 8D6C E945 15BA  4CD9 900D FB34 2AB0 38D7
> > Breite Strasse 79, 41460 Neuss, Germany
> > +49 1511 874 4526


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Freyssinet Andre
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