Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/9181#discussion_r42498602
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala
---
@@ -69,9 +69,12 @@ private[streaming] class ReceiverSchedulingPolicy {
* </ol>
*
* This method is called when we start to launch receivers at the first
time.
+ *
+ * @return a map for receivers and their scheduled locations
*/
def scheduleReceivers(
- receivers: Seq[Receiver[_]], executors: Seq[String]): Map[Int,
Seq[String]] = {
+ receivers: Seq[Receiver[_]],
+ executors: Seq[ExecutorCacheTaskLocation]): Map[Int,
Seq[TaskLocation]] = {
--- End diff --
Use `TaskLocation` in the return type because the locations could be host
from `Receiver.preferredLocation`, or `ExecutorCacheTaskLocation`.
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