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Date: Wed, 29 Jul 2009 09:50:33 -0700 (PDT)
From: "Gary Tully (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Subject: [jira] Commented: (AMQ-2334) getJMSRedelivered() incorrectly
 returns false after a MasterSlave failover
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    [ https://issues.apache.org/activemq/browse/AMQ-2334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=53022#action_53022 ] 

Gary Tully commented on AMQ-2334:
---------------------------------

that seems like a reasonable (and smart) solution but it may make sense as part of a broker plugin and/or destination filter so that it can be easily enabled or disabled. If redelivery semantics are vital then it can be enabled through config etc.
>From what I can see, any other solution will require storing the message twice which would kill performance.

> getJMSRedelivered() incorrectly returns false after a MasterSlave failover
> --------------------------------------------------------------------------
>
>                 Key: AMQ-2334
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2334
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.2.0
>            Reporter: Kyle Anderson
>         Attachments: SanRedeliver.java
>
>   Original Estimate: 3 hours
>  Remaining Estimate: 3 hours
>
> Shared master/slave setup, described here http://activemq.apache.org/shared-file-system-master-slave.html
> Scenario:
> 1. Transacted consumer receives a message
> 2. Transacted consumer disconnects prior to committing
> 3. Transacted consumer #2 receives the same message.
> Normally consumer #2 sees that message as getJMSRedelivered() = true.  However, if the broker fails and another takes over from the data dir between step 1 and 3, the redelivery is set as false - even though a consumer has, in fact, seen the message before.  See attached unit test.

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