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Posted to common-dev@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2013/08/21 20:23:52 UTC

[jira] [Created] (HADOOP-9894) Race condition in Shell leads to logged error stream handling exceptions

Jason Lowe created HADOOP-9894:
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             Summary: Race condition in Shell leads to logged error stream handling exceptions
                 Key: HADOOP-9894
                 URL: https://issues.apache.org/jira/browse/HADOOP-9894
             Project: Hadoop Common
          Issue Type: Bug
          Components: util
    Affects Versions: 2.1.0-beta
            Reporter: Jason Lowe


Shell.runCommand starts an error stream handling thread and normally joins with it before closing the error stream.  However if parseExecResult throws an exception (e.g.: like Stat.parseExecResult does for FileNotFoundException) then the error thread is not joined and the error stream can be closed before the error stream handling thread is finished.  This causes the error stream handling thread to log an exception backtrace for a "normal" situation.

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