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From "Hadrian Zbarcea (JIRA)" <j...@apache.org>
Subject [jira] Updated: (AMQ-2414) JDBC datastore locking does not work when using MYSQL cluster
Date Tue, 10 Aug 2010 13:27:17 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-2414?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hadrian Zbarcea updated AMQ-2414:
---------------------------------

    Fix Version/s: 5.4.1
                       (was: 5.4.0)

> JDBC datastore locking does not work when using MYSQL cluster
> -------------------------------------------------------------
>
>                 Key: AMQ-2414
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2414
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Message Store
>    Affects Versions: 5.3.0
>            Reporter: Alexander Fisher
>             Fix For: 5.4.1
>
>         Attachments: mysql-cluster-locking-r818849.patch
>
>
> JDBC Master/Slave doesn't work properly for mysql cluster when the master and slave brokers
are using different MYSQL frontends as would be required in a HA setup.  The code currently
locks the database using a TABLE lock which are not cluster wide in mysql.
> http://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-limitations-multiple-nodes.html
> The default code path uses a SELECT FOR UPDATE to get a lock.  This is supported in mysql
cluster.
> The attached patch works for me.

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