Github user mateiz commented on a diff in the pull request:
https://github.com/apache/spark/pull/477#discussion_r11938430
--- Diff: core/src/main/scala/org/apache/spark/rdd/RDD.scala ---
@@ -334,11 +336,11 @@ abstract class RDD[T: ClassTag](
* Randomly splits this RDD with the provided weights.
*
* @param weights weights for splits, will be normalized if they don't
sum to 1
- * @param seed random seed, default to System.nanoTime
+ * @param seed random seed, default to rand.nextLong
--- End diff --
You don't need to say what the seed defaults to here since users won't
understand it; just say `@param seed random seed` and they can guess that if
you don't specify it, we will choose one
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