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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4106) BPServiceActor#lastHeartbeat, lastBlockReport and lastDeletedReport should be declared as volatile
Date Tue, 23 Oct 2012 00:26:13 GMT
Jing Zhao created HDFS-4106:
-------------------------------

             Summary: BPServiceActor#lastHeartbeat, lastBlockReport and lastDeletedReport
should be declared as volatile
                 Key: HDFS-4106
                 URL: https://issues.apache.org/jira/browse/HDFS-4106
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 3.0.0
            Reporter: Jing Zhao
            Assignee: Jing Zhao
            Priority: Minor
         Attachments: HDFS-4106-trunk.001.patch

All these variables may be assigned/read by a testing thread (through BPServiceActor#triggerXXX)
while also assigned/read by the actor thread. Thus they should be declared as volatile to
make sure the "happens-before" consistency.

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