Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/945#discussion_r17558868
--- Diff:
streaming/src/test/scala/org/apache/spark/streaming/NetworkReceiverSuite.scala
---
@@ -146,6 +146,44 @@ class NetworkReceiverSuite extends FunSuite with
Timeouts {
assert(recordedData.toSet === generatedData.toSet)
}
+ test("block generator throttling") {
+ val blockGeneratorListener = new FakeBlockGeneratorListener
+ val blockInterval = 50
+ val maxRate = 200
+ val conf = new SparkConf().set("spark.streaming.blockInterval",
blockInterval.toString).
+ set("spark.streaming.receiver.maxRate", maxRate.toString)
+ val blockGenerator = new BlockGenerator(blockGeneratorListener, 1,
conf)
+ val expectedBlocks = 20
+ val waitTime = expectedBlocks * blockInterval
+ val expectedMessages = maxRate * waitTime / 1000
+ val expectedMessagesPerBlock = maxRate * blockInterval / 1000
+ val generatedData = new ArrayBuffer[Int]
+
+ // Generate blocks
+ val startTime = System.currentTimeMillis()
+ blockGenerator.start()
+ var count = 0
+ while(System.currentTimeMillis - startTime < waitTime) {
+ blockGenerator += count
+ generatedData += count
+ count += 1
+ Thread.sleep(1)
+ }
+ blockGenerator.stop()
+
+ val recordedData = blockGeneratorListener.arrayBuffers
+ assert(blockGeneratorListener.arrayBuffers.size > 0)
+ assert(recordedData.flatten.toSet === generatedData.toSet)
+ // recordedData size should be close to the expected rate
+ assert(recordedData.flatten.size >= expectedMessages * 0.9 &&
+ recordedData.flatten.size <= expectedMessages * 1.1 )
+ // the first and last block may be incomplete, so we slice them out
+ recordedData.slice(1, recordedData.size - 1).foreach { block =>
+ assert(block.size >= expectedMessagesPerBlock * 0.8 &&
--- End diff --
This test is still a frequent cause of Jenkins failures; I'm investigating
fixes, but I'd appreciate help.
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