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From "Johno Crawford (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-1958) JDBC master/slave deadlock when connection is lost
Date Mon, 16 Apr 2012 17:00:18 GMT

    [ https://issues.apache.org/jira/browse/AMQ-1958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13254807#comment-13254807
] 

Johno Crawford commented on AMQ-1958:
-------------------------------------

A lot of talk over @ AMQ-3654 . Can we close this ticket as duplicate?
                
> JDBC master/slave deadlock when connection is lost
> --------------------------------------------------
>
>                 Key: AMQ-1958
>                 URL: https://issues.apache.org/jira/browse/AMQ-1958
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker, Message Store
>    Affects Versions: 4.1.2, 5.0.0, 5.1.0, 5.2.0
>         Environment: oracle 10, mysql 5
>            Reporter: Guy Veraghtert
>             Fix For: NEEDS_REVIEWED
>
>
> In a pure JDBC failover scenario with one master and one slave: when the master loses
its network connection to the database, the lock in the database will not be released. As
such the slave will not know that the master isn't able to perform its work and it will continue
to attempt to acquire a lock (which will never be released), when the master is restarted
(after its connection is restored), it will become slave too, ending up with two slaves.
> This behavior was encountered on Oracle 10 and Mysql 5.

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