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https://issues.apache.org/activemq/browse/AMQ-2439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=54580#action_54580
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Hiram Chirino commented on AMQ-2439:
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I confirmed that KahaDB indexes were inconsistent on a restart and that is the
reason the same duplicate message kept getting re-delivered.
I seems the reason the indexes were becoming inconsistent is because it was not
being defensive when it add new messages. If a duplicate message was added to
kahadb it's two of it's btrees would no longer be consistent.
> KahaDB + Network of Brokers + Restart = Duplicate Messages that cannot be
> removed from the data store
> -----------------------------------------------------------------------------------------------------
>
> Key: AMQ-2439
> URL: https://issues.apache.org/activemq/browse/AMQ-2439
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker, Message Store
> Reporter: Hiram Chirino
> Assignee: Hiram Chirino
> Fix For: 5.3.0
>
>
> Every time the broker is restarted, the same set of duplicate messages get
> redelivered to consumers.
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