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Posted to issues@spark.apache.org by "fuminglin (JIRA)" <ji...@apache.org> on 2014/10/14 11:03:33 UTC

[jira] [Created] (SPARK-3942) LogisticRegressionWithLBFGS should not use SquaredL2Updater

fuminglin created SPARK-3942:
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             Summary: LogisticRegressionWithLBFGS should not use SquaredL2Updater 
                 Key: SPARK-3942
                 URL: https://issues.apache.org/jira/browse/SPARK-3942
             Project: Spark
          Issue Type: Bug
          Components: MLlib
    Affects Versions: 1.1.0
            Reporter: fuminglin


LBFGS method use line search for step size, in all mllib`s updater use step-size decreasing with the square root of the number of iterations, this may cause Wolfe condition not hold.



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