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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