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From "Netlancer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-5290) MQTT clients using durable subscriptions on networked brokers received duplicates
Date Wed, 24 Sep 2014 03:49:34 GMT

    [ https://issues.apache.org/jira/browse/AMQ-5290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14145844#comment-14145844
] 

Netlancer commented on AMQ-5290:
--------------------------------

The following scenario is failing using the virtual topic subscription Strategy

broker A and B are networked 

1. client ( clientID2 ) connects to broker B and subscribes to topic foo with QoS 2 .
2. client ( clientID1 ) connects to broker A and publishes to topic foo with QoS 2.

The message though received by broker B  ( as seen in debug logs ) is not received by the
clientID2. 



> 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
>            Assignee: 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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