[jira] [Created] (SPARK-19234) AFTSurvivalRegression chokes silently or with confusing errors when any labels are zero

["Andrew MacKinlay (JIRA)" <ji...@apache.org>]

Andrew MacKinlay created SPARK-19234:
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             Summary: AFTSurvivalRegression chokes silently or with confusing errors when any labels are zero
                 Key: SPARK-19234
                 URL: https://issues.apache.org/jira/browse/SPARK-19234
             Project: Spark
          Issue Type: Bug
          Components: ML
    Affects Versions: 2.1.0
         Environment: spark-shell or pyspark
            Reporter: Andrew MacKinlay


If you try and use AFTSurvivalRegression and any label in your input data is 0.0, you get coefficients of 0.0 returned, and in many cases, errors like this:

{{17/01/16 15:10:50 ERROR StrongWolfeLineSearch: Encountered bad values in function evaluation. Decreasing step size to NaN}}





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