Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/9075#discussion_r42310297
--- Diff:
streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala
---
@@ -80,6 +82,28 @@ class ReceiverTrackerSuite extends TestSuiteBase {
}
}
}
+
+ test("SPARK-11063: TaskSetManager should use Receiver RDD's
preferredLocations") {
+ // Use ManualClock to prevent from starting batches so that we can
make sure the only task is
+ // for starting the Receiver
+ val _conf = conf.clone.set("spark.streaming.clock",
"org.apache.spark.util.ManualClock")
+ withStreamingContext(new StreamingContext(_conf, Milliseconds(100))) {
ssc =>
+ @volatile var receiverTaskLocality: TaskLocality = null
+ ssc.sparkContext.addSparkListener(new SparkListener {
+ override def onTaskStart(taskStart: SparkListenerTaskStart): Unit
= {
+ receiverTaskLocality = taskStart.taskInfo.taskLocality
+ }
+ })
+ val input = ssc.receiverStream(new TestReceiver)
+ val output = new TestOutputStream(input)
+ output.register()
+ ssc.start()
+ eventually(timeout(10 seconds), interval(10 millis)) {
+ // If preferredLocations is set correctly, receiverTaskLocality
should be NODE_LOCAL
+ assert(receiverTaskLocality === TaskLocality.NODE_LOCAL)
--- End diff --
It's `TaskLocality.ANY` without this patch.
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