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Posted to dev@activemq.apache.org by "Netlancer (JIRA)" <ji...@apache.org> on 2014/09/24 05:49:34 UTC
[jira] [Commented] (AMQ-5290) MQTT clients using durable
subscriptions on networked brokers received duplicates
[ 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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