Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18092#discussion_r122617592
--- Diff:
core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala ---
@@ -1281,6 +1286,59 @@ class BlockManagerSuite extends SparkFunSuite with
Matchers with BeforeAndAfterE
assert(master.getLocations("item").isEmpty)
}
+ test("SPARK-20640: Shuffle registration timeout and maxAttempts conf are
working") {
+ val tryAgainMsg = "test_spark_20640_try_again"
+ // a server which delays response 50ms and must try twice for success.
+ def newShuffleServer(port: Int): (TransportServer, Int) = {
+ val attempts = new mutable.HashMap[String, Int]()
+ val handler = new NoOpRpcHandler {
+ override def receive(client: TransportClient, message: ByteBuffer,
+ callback: RpcResponseCallback): Unit = {
+ val msgObj = BlockTransferMessage.Decoder.fromByteBuffer(message)
+ msgObj match {
+ case exec: RegisterExecutor =>
+ Thread.sleep(50)
+ val attempt = attempts.getOrElse(exec.execId, 0) + 1
+ attempts(exec.execId) = attempt
+ if (attempt < 2) {
+ callback.onFailure(new Exception(tryAgainMsg))
+ return
+ }
+ callback.onSuccess(ByteBuffer.wrap(new Array[Byte](0)))
+ }
+ }
+ }
+
+ val transConf = SparkTransportConf.fromSparkConf(conf, "shuffle",
numUsableCores = 0)
+ val transCtx = new TransportContext(transConf, handler, true)
+ (transCtx.createServer(port,
Seq.empty[TransportServerBootstrap].asJava), port)
+ }
+ val candidatePort = RandomUtils.nextInt(1024, 65536)
+ val (server, shufflePort) = Utils.startServiceOnPort(candidatePort,
--- End diff --
will this be flaky? e.g. the port is occupied by other test suites
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