[jira] [Commented] (AMQ-5734) Support MQTT 3.1 silent subscription fail

["Dejan Bosanac (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMQ-5734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14521513#comment-14521513 ] 

Dejan Bosanac commented on AMQ-5734:
------------------------------------

Hi Gary, yes this is expected behavior.

{quote}A PUBLISH 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 message with the same topic name MUST be removed and any future subscribers for the topic will not receive a retained message {quote}

Thanks for fixing the test.

> Support MQTT 3.1 silent subscription fail
> -----------------------------------------
>
>                 Key: AMQ-5734
>                 URL: https://issues.apache.org/jira/browse/AMQ-5734
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: MQTT
>    Affects Versions: 5.11.0
>            Reporter: Dejan Bosanac
>            Assignee: Dejan Bosanac
>             Fix For: 5.12.0
>
>
> There's a difference in what 3.1 and 3.1.1 specs say should happen when an unauthorised subscribe happens. In 3.1, the broker don't informs the client so it just silently ignores the problem. In 3.1.1 it sends special QoS back. We currently only implement the later. We need to implement also 3.1 behaviour for older clients.



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