[jira] [Commented] (AMQ-5290) MQTT clients using durable subscriptions on networked brokers received duplicates

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

    [ https://issues.apache.org/jira/browse/AMQ-5290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14088318#comment-14088318 ] 

Timothy Bish commented on AMQ-5290:
-----------------------------------

Added a proof of concept that utilizes virtual topics for subscriptions if the virtual topic subscription strategy is enabled, otherwise uses the standard durable topics subscriptions as always. 

To enable the transport connector needs to add the option:

{noformat}
?transport.subscriptionStrategyName="mqtt-virtual-topic-subscriptions"
{noformat}

> MQTT clients using durable subscriptions on networked brokers received duplicates
> ---------------------------------------------------------------------------------
>
>                 Key: AMQ-5290
>                 URL: https://issues.apache.org/jira/browse/AMQ-5290
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: MQTT
>    Affects Versions: 5.10.0
>            Reporter: Timothy Bish
>             Fix For: 5.11.0
>
>
> MQTT clients that create durable subscriptions and that operate in a network of Brokers can receive duplicate messages when they start failing back and forth between brokers in the network.
> We should investigate using Virtual Destinations under the covers instead of durable topics subscriptions as this is a known problem with the durable topic case.  With Virtual Destinations the client would be subscribed to a Queue that would receive all messages sent to the target Topic.  



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