Github user zhengruifeng commented on a diff in the pull request:
https://github.com/apache/spark/pull/16661#discussion_r97478414
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/clustering/GaussianMixture.scala ---
@@ -486,6 +491,9 @@ class GaussianMixture @Since("2.0.0") (
@Since("2.0.0")
object GaussianMixture extends DefaultParamsReadable[GaussianMixture] {
+ /** Limit number of features such that numFeatures^2^ < Integer.MaxValue
*/
+ private[clustering] val MAX_NUM_FEATURES = 46000
--- End diff --
In https://github.com/apache/spark/pull/15413, the symmetry of covariance
matrix is taken into account and only the upper triangular part is store. So
this number seems to be 65535? (`math.sqrt(Int.MaxValue.toDouble * 2)`)
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