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From "Guy Veraghtert (JIRA)" <>
Subject [jira] Created: (AMQ-1958) JDBC master/slave deadlock when connection is lost
Date Mon, 29 Sep 2008 14:10:53 GMT
JDBC master/slave deadlock when connection is lost

                 Key: AMQ-1958
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker, Message Store
    Affects Versions: 5.2.0, 5.1.0, 5.0.0, 4.1.2
         Environment: oracle 10, mysql 5
            Reporter: Guy Veraghtert

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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