[jira] [Resolved] (AMQ-5298) MQTT Transport can generate class cast exception when subscription is to a Virtual Topic

["Timothy Bish (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMQ-5298?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Timothy Bish resolved AMQ-5298.
-------------------------------

    Resolution: Fixed

Fixed the NPE scenario.  The issue with retained messages is not really related to this code so a separate issue will be opened to cover that.

> MQTT Transport can generate class cast exception when subscription is to a Virtual Topic
> ----------------------------------------------------------------------------------------
>
>                 Key: AMQ-5298
>                 URL: https://issues.apache.org/jira/browse/AMQ-5298
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: MQTT
>    Affects Versions: 5.10.0
>            Reporter: Timothy Bish
>             Fix For: 5.11.0
>
>
> When a client subscribes to a Virtual Topic and sends a duplicate subscription request the method that resends the old retained messages tries to cast the destination from the TopicRegion is finds to a Topic but in this case it would be a VirtualTopicIntercepter and an exception is thrown disconnecting the client.



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