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  1. Hadoop Common
  2. HADOOP-9450

HADOOP_USER_CLASSPATH_FIRST is not honored; CLASSPATH is PREpended instead of APpended

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 1-win, 2.1.0-beta, 1.3.0
    • scripts
    • None
    • Reviewed

    Description

      On line 133 of the hadoop shell wrapper, CLASSPATH is set as:

      CLASSPATH=${CLASSPATH}:${HADOOP_CLASSPATH}

      Notice that the built-up CLASSPATH, along with all the libs and unwanted JARS are pre-pended BEFORE the user's HADOOP_CLASSPATH. Therefore there is no way to put your own JARs in front of those that the hadoop wrapper script sets.

      We propose a patch that reverses this order. Failing that, we would like to add a command line option to override this behavior and enable a user's JARs to be found before the wrong ones in the Hadoop library paths.

      We always welcome your opinions.

      Attachments

        1. HADOOP-9450.patch
          3 kB
          Chris Nauroth
        2. HADOOP-9450.patch
          3 kB
          Harsh J
        3. HADOOP-9450-branch-1.patch
          1 kB
          Chris Nauroth
        4. HADOOP-9450-branch-1-win.patch
          2 kB
          Chris Nauroth
        5. HADOOP-9450-branch-2.patch
          2 kB
          Harsh J

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            qwertymaniac Harsh J
            mfw@wyle.org Mitch Wyle
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              Created:
              Updated:
              Resolved:

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