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  1. Hadoop Map/Reduce
  2. MAPREDUCE-2639

MR-279: Fixup the exponentially smoothed runtime estimator, fix a couple of bugs in DataStatistics, and do a little bit of cleanup.

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: mrv2
    • Labels:
      None
    • Environment:

      All

      Description

      A catch-all JIRA for a pass I took through the v2.app.speculate package.

      1) Fixed the ExponentiallySmoothedTaskRuntimeEstimator so that it can run and pass the test defined in TestRuntimeEstimators.
      2) Fixed two bugs in DataStatistics: 1) a divide by zero in the variance calculation in the case that count == 0 and 2) a synchronization issue in how the updateStatistics method was implemented,
      3) A bunch of typo corrections, formatting fixes, and adding some consistency around the null value checking.

      I probably need to do a couple more passes through this code to get it into better shape, but this seemed like a good start. Will attach my patch momentarily.

        Attachments

        1. MAPREDUCE-2639-1.patch
          7 kB
          Josh Wills
        2. MAPREDUCE-2639-2.patch
          4 kB
          Josh Wills
        3. MAPREDUCE-2639-3.patch
          12 kB
          Josh Wills

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              • Assignee:
                jwills Josh Wills
                Reporter:
                jwills Josh Wills
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                • Created:
                  Updated: