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From "John Gordon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4368) TaskRunner fails to start jars when the java.library.path contains a quoted path with embedded spaces
Date Mon, 25 Jun 2012 23:55:42 GMT
John Gordon created MAPREDUCE-4368:
--------------------------------------

             Summary: TaskRunner fails to start jars when the java.library.path contains a
quoted path with embedded spaces
                 Key: MAPREDUCE-4368
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4368
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: tasktracker
    Affects Versions: 1-win
         Environment: on Windows: 
set PATH=%PATH%;"C:\this memorable place".
            Reporter: John Gordon
             Fix For: 1-win


TaskRunner splits arguments by space before it adds them back to the vargs list, so it loses
all context of quote escaped strings with embedded spaces.  This gets fixed up later by wrapping
all arguments with " -- so you get something like java "-D<opt>=<value>".  This
is problematic for paths with embedded spaces, where we end up creating "-D<opt>=<first
part" "last part>".  To java, the jar being run is last part.  So with the environment
above, you will see "ClassNoDefFoundError: memorable" and the jar will fail to start.  In
this particular case, we know that java.libarary.path contains paths and the tests often use
%PATH% to seed this, so the fix is to remove embedded quotes in listed path elements because
we know the aggregate will be quoted when the JVM is started.

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