This is more of a java/scala question than spark - it uses java.util.Random : https://github.com/scala/scala/blob/2.11.x/src/library/scala/util/Random.scala
> On 3 Mar 2015, at 15:08, Vijayasarathy Kannan <kvi...@vt.edu> wrote: > > Hi, > > What pseudo-random-number generator does scala.util.Random uses?
