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List:       activemq-dev
Subject:    [jira] [Created] (AMQ-3301) LockFile in-jvm check is not
From:       "Arthur Naseef (JIRA)" <jira () apache ! org>
Date:       2011-04-29 17:47:03
Message-ID: 211835523.12112.1304099223683.JavaMail.tomcat () hel ! zones ! apache ! org
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LockFile in-jvm check is not thread-safe
----------------------------------------

                 Key: AMQ-3301
                 URL: https://issues.apache.org/jira/browse/AMQ-3301
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.4.2
            Reporter: Arthur Naseef
            Priority: Minor


kahadb/src/main/java/org/apache/kahadb/util/LockFile.java adds in-JVM locking to \
Channel.tryLock() using system properties.  However, there is time between the \
read-and-check for an existing lock and setting a new lock.

I found this problem while running multiple brokers in a single JVM for diagnostic \
purposes with two brokers using a shared directory to simlute a production H/A \
environment.

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