Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/2455#discussion_r18423429
--- Diff:
core/src/main/scala/org/apache/spark/util/random/RandomSampler.scala ---
@@ -39,13 +42,46 @@ trait RandomSampler[T, U] extends Pseudorandom with
Cloneable with Serializable
/** take a random sample */
def sample(items: Iterator[T]): Iterator[U]
+ /** return a copy of the RandomSampler object */
override def clone: RandomSampler[T, U] =
throw new NotImplementedError("clone() is not implemented.")
}
+@DeveloperApi
--- End diff --
`@DeveloperApi` is not necessary for package private classes.
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