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Posted to hdfs-dev@hadoop.apache.org by "Jing Zhao (JIRA)" <ji...@apache.org> on 2012/10/23 02:26:13 UTC

[jira] [Created] (HDFS-4106) BPServiceActor#lastHeartbeat, lastBlockReport and lastDeletedReport should be declared as volatile

Jing Zhao created HDFS-4106:
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             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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