Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/5125#discussion_r26967311
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -986,7 +986,7 @@ class SparkContext(config: SparkConf) extends Logging
with ExecutorAllocationCli
union(Seq(first) ++ rest)
/** Get an RDD that has no partitions or elements. */
- def emptyRDD[T: ClassTag] = new EmptyRDD[T](this)
+ def emptyRDD[T: ClassTag]: EmptyRDD[T] = new EmptyRDD[T](this)
--- End diff --
This is written up a bit more in
https://issues.apache.org/jira/browse/SPARK-2331 which should be reopened for
the new "2+" bucket in JIRA. This should be fixed when binary compatibility can
be broken. Yes, big +1 to tightening up types like this.
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