Github user AnthonyTruchet commented on a diff in the pull request:
https://github.com/apache/spark/pull/17076#discussion_r103249915
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/LinearSVC.scala ---
@@ -440,19 +440,9 @@ private class LinearSVCAggregator(
private val numFeatures: Int = bcFeaturesStd.value.length
private val numFeaturesPlusIntercept: Int = if (fitIntercept)
numFeatures + 1 else numFeatures
- private val coefficients: Vector = bcCoefficients.value
private var weightSum: Double = 0.0
private var lossSum: Double = 0.0
- require(numFeaturesPlusIntercept == coefficients.size, s"Dimension
mismatch. Coefficients " +
- s"length ${coefficients.size}, FeaturesStd length ${numFeatures},
fitIntercept: $fitIntercept")
-
- private val coefficientsArray = coefficients match {
- case dv: DenseVector => dv.values
- case _ =>
- throw new IllegalArgumentException(
- s"coefficients only supports dense vector but got type
${coefficients.getClass}.")
- }
- private val gradientSumArray =
Array.fill[Double](coefficientsArray.length)(0)
+ private lazy val gradientSumArray = new
Array[Double](numFeaturesPlusIntercept)
--- End diff --
I'm not very confident in my understanding of @transcient annotation when
comined with lazy but I would expect it here. Can s.o. more versed confirm or
infirm ?
http://fdahms.com/2015/10/14/scala-and-the-transient-lazy-val-pattern/
http://stackoverflow.com/questions/34769220/difference-when-serializing-a-lazy-val-with-or-without-transient
(unanswered)
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