support yarn mode(percentage style)

Author: li-zhihui

core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala

@@ -50,10 +50,10 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, actorSystem: A
   val conf = scheduler.sc.conf
   private val timeout = AkkaUtils.askTimeout(conf)
   private val akkaFrameSize = AkkaUtils.maxFrameSizeBytes(conf)
-  val registeredRatio = conf.getDouble("spark.executor.registeredRatio", 0)
-  val maxRegisteredWaitingTime = conf.getInt("spark.executor.maxRegisteredWaitingTime", 10000)
+  var minRegisteredRatio = conf.getDouble("spark.scheduler.minRegisteredRatio", 0)
+  val maxRegisteredWaitingTime = conf.getInt("spark.scheduler.maxRegisteredWaitingTime", 10000)
   val createTime = System.currentTimeMillis()
-  var ready = if(registeredRatio==0)true else false
+  var ready = if (minRegisteredRatio <= 0) true else false
 
   class DriverActor(sparkProperties: Seq[(String, String)]) extends Actor {
     private val executorActor = new HashMap[String, ActorRef]
@@ -88,7 +88,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, actorSystem: A
           executorAddress(executorId) = sender.path.address
           addressToExecutorId(sender.path.address) = executorId
           totalCoreCount.addAndGet(cores)
-          if (executorActor.size >= totalExecutors.get() * registeredRatio) {
+          if (executorActor.size >= totalExecutors.get() * minRegisteredRatio) {
             ready = true
           }
           makeOffers()

yarn/common/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala

@@ -77,6 +77,12 @@ private[spark] class YarnClientSchedulerBackend(
 
     logDebug("ClientArguments called with: " + argsArrayBuf)
     val args = new ClientArguments(argsArrayBuf.toArray, conf)
+    totalExecutors.set(args.numExecutors)
+    // reset default minRegisteredRatio for yarn mode
+    if (minRegisteredRatio == 0) {
+      minRegisteredRatio = 0.9
+      ready = false
+    }
     client = new Client(args, conf)
     appId = client.runApp()
     waitForApp()