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From "Gary Tully (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-2704) Non durable TopicSubscriptions can get duplicate messages in a network of brokers ring - suppression works in the stores and for durables
Date Wed, 21 Apr 2010 14:03:15 GMT
Non durable TopicSubscriptions can get duplicate messages in a network of brokers ring - suppression
works in the stores and for durables
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                 Key: AMQ-2704
                 URL: https://issues.apache.org/activemq/browse/AMQ-2704
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 5.3.1
            Reporter: Gary Tully
            Assignee: Gary Tully
             Fix For: 5.4.0


With a ring topology some duplicates are inevitable, Brokers A,B,C,D - producer on A, consumer
on C, paths A-B-C and A-D-C are identical. When the subscription is backed by a store, the
store traps/suppresses the duplicate. A regular Topic sub does not have such suppression as
it does not use a message cursor, just regular direct dispatch.
A regular topic sub needs some duplicate suppression in line with the PolicyEntry enableAudit.

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