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https://issues.apache.org/activemq/browse/AMQ-2753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dejan Bosanac resolved AMQ-2753.
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Resolution: Fixed
Added another test that verifies message rerouting. We can resolve it now.
> Allow duplicate topic subscriptions in a network and use dispatch policy to
> use highest priority subscriptions such that the duplicates are only used for
> redundancy
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: AMQ-2753
> URL: https://issues.apache.org/activemq/browse/AMQ-2753
> Project: ActiveMQ
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 5.3.2
> Reporter: Gary Tully
> Assignee: Gary Tully
> Fix For: 5.4.0
>
>
> duplicate topic subscriptions are suppressed in a cyclic network,
> https://issues.apache.org/activemq/browse/AMQ-2030 but there is a use case
> where they can be usefull.
> imagine a usecase where we produce on the one broker and consume on other.
> These two brokers have a cyclic network connection between them. So usually
> the message is going directly from broker A to broker B, but when that
> network connector goes down, topic consumer on broker B stops receiving
> messages. We want to have a "message rerouting", so that in failure case
> messages start flowing A->C->B route, without a need to re-subscribe.
> With a cyclic network like this, if we allow the duplicate subscriptions we
> need to choose among them to suppress duplicates and reduce network load.
> https://issues.apache.org/activemq/browse/AMQ-2704 added the audit which can
> help if we don't choose among the duplicates.
> A PriorityNetworkDispatchPolicy can choose to dispatch to the highest
> priority subscription in the case of duplicate network consumers so that the
> messages are suppressed at source.
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