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  1. Spark
  2. SPARK-29818 Missing persist on RDD
  3. SPARK-29826

Missing persist on data in mllib.feature.ChiSqSelector.fit

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Duplicate
    • 2.4.3
    • None
    • MLlib
    • None

    Description

      The rdd data in mllib.feature.ChiSqSelector.fit() is used by an action in Statistics.chiSqTest(data) and other actions in the following code, but it is not persisted.

       
  def fit(data: RDD[LabeledPoint]): ChiSqSelectorModel = {
    val chiSqTestResult = Statistics.chiSqTest(data).zipWithIndex
    val features = selectorType match {
      case ChiSqSelector.NumTopFeatures =>
        chiSqTestResult
          .sortBy { case (res, _) => res.pValue }
          .take(numTopFeatures)

      This issue is reported by our tool CacheCheck, which is used to dynamically detecting persist()/unpersist() api misuses.

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          duplicates

          Improvement - An improvement or enhancement to an existing feature or task. SPARK-29818 Missing persist on RDD

          • Major - Major loss of function.
          • Resolved

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              Unassigned Unassigned
              spark_cachecheck IcySanwitch
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              Dates

                Created:
                Updated:
                Resolved: