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From "Berge Stillingen (JIRA)" <>
Subject [jira] [Created] (AMQ-6424) Duplicate dead letter queues using journaling
Date Fri, 09 Sep 2016 09:13:22 GMT
Berge Stillingen created AMQ-6424:

             Summary: Duplicate dead letter queues using journaling
                 Key: AMQ-6424
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker, KahaDB
    Affects Versions: 5.14.0, 5.13.3
            Reporter: Berge Stillingen

In version 5.14 (and 5.13.3) it appears the broker is able to 'occasionally' create extra
DLQ-queues holding duplicate messages. 
Browsing the admin console, you will sometimes see something like this: 

- DLQ.myEventQueue 
- DLQ.DLQ.myEventQueue 

That both hold the samme message ID, eg. ID:ClientABC-61753-1471513949441-1:4:1:3:1	

The one from DLQ.myEventQueue is a standard entry caused by a client transaction rollback.

The (unwanted) one from DLQ.DLQ.myEventQueue has a 
- dlqDeliveryFailureCause: java.lang.Throwable: duplicate paged in from store for queue://DLQ.myEventQueue

At some point you can even get a third queue named 
- DLQ.DLQ.DLQ.myEventQueue holding another message with the samme MessageID and the same dlqDeliveryFailureCause

Reproduce: Haven't found a way to provoke the error. It happens occasionally in a semi-active
test environment running with Mule 3.6.2. 
Best guess is that there is some issue with the use of Journaling and synchronization between
Kahadb and the MSSQL-database. Configuration file is attached 

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