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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.scheduler.cluster
import org.apache.spark.{Logging, SparkConf, SparkContext, SparkEnv}
import org.apache.spark.deploy.{ApplicationDescription, Command}
import org.apache.spark.deploy.client.{AppClient, AppClientListener}
import org.apache.spark.scheduler.{ExecutorExited, ExecutorLossReason, SlaveLost, TaskSchedulerImpl}
import org.apache.spark.util.Utils
private[spark] class SparkDeploySchedulerBackend(
scheduler: TaskSchedulerImpl,
sc: SparkContext,
masters: Array[String])
extends CoarseGrainedSchedulerBackend(scheduler, sc.env.actorSystem)
with AppClientListener
with Logging {
var client: AppClient = null
var stopping = false
var shutdownCallback : (SparkDeploySchedulerBackend) => Unit = _
var appId: String = _
val registrationLock = new Object()
var registrationDone = false
val maxCores = conf.getOption("spark.cores.max").map(_.toInt)
val totalExpectedCores = maxCores.getOrElse(0)
override def start() {
super.start()
// The endpoint for executors to talk to us
val driverUrl = "akka.tcp://%s@%s:%s/user/%s".format(
SparkEnv.driverActorSystemName,
conf.get("spark.driver.host"),
conf.get("spark.driver.port"),
CoarseGrainedSchedulerBackend.ACTOR_NAME)
val args = Seq(driverUrl, "{{EXECUTOR_ID}}", "{{HOSTNAME}}", "{{CORES}}", "{{WORKER_URL}}")
val extraJavaOpts = sc.conf.getOption("spark.executor.extraJavaOptions")
.map(Utils.splitCommandString).getOrElse(Seq.empty)
val classPathEntries = sc.conf.getOption("spark.executor.extraClassPath").toSeq.flatMap { cp =>
cp.split(java.io.File.pathSeparator)
}
val libraryPathEntries =
sc.conf.getOption("spark.executor.extraLibraryPath").toSeq.flatMap { cp =>
cp.split(java.io.File.pathSeparator)
}
// Start executors with a few necessary configs for registering with the scheduler
val sparkJavaOpts = Utils.sparkJavaOpts(conf, SparkConf.isExecutorStartupConf)
val javaOpts = sparkJavaOpts ++ extraJavaOpts
val command = Command("org.apache.spark.executor.CoarseGrainedExecutorBackend",
args, sc.executorEnvs, classPathEntries, libraryPathEntries, javaOpts)
val appUIAddress = sc.ui.map(_.appUIAddress).getOrElse("")
val eventLogDir = sc.eventLogger.map(_.logDir)
val appDesc = new ApplicationDescription(sc.appName, maxCores, sc.executorMemory, command,
appUIAddress, eventLogDir)
client = new AppClient(sc.env.actorSystem, masters, appDesc, this, conf)
client.start()
waitForRegistration()
}
override def stop() {
stopping = true
super.stop()
client.stop()
if (shutdownCallback != null) {
shutdownCallback(this)
}
}
override def connected(appId: String) {
logInfo("Connected to Spark cluster with app ID " + appId)
this.appId = appId
notifyContext()
}
override def disconnected() {
notifyContext()
if (!stopping) {
logWarning("Disconnected from Spark cluster! Waiting for reconnection...")
}
}
override def dead(reason: String) {
notifyContext()
if (!stopping) {
logError("Application has been killed. Reason: " + reason)
scheduler.error(reason)
// Ensure the application terminates, as we can no longer run jobs.
sc.stop()
}
}
override def executorAdded(fullId: String, workerId: String, hostPort: String, cores: Int,
memory: Int) {
logInfo("Granted executor ID %s on hostPort %s with %d cores, %s RAM".format(
fullId, hostPort, cores, Utils.megabytesToString(memory)))
}
override def executorRemoved(fullId: String, message: String, exitStatus: Option[Int]) {
val reason: ExecutorLossReason = exitStatus match {
case Some(code) => ExecutorExited(code)
case None => SlaveLost(message)
}
logInfo("Executor %s removed: %s".format(fullId, message))
removeExecutor(fullId.split("/")(1), reason.toString)
}
override def sufficientResourcesRegistered(): Boolean = {
totalCoreCount.get() >= totalExpectedCores * minRegisteredRatio
}
override def applicationId(): Option[String] = Option(appId)
private def waitForRegistration() = {
registrationLock.synchronized {
while (!registrationDone) {
registrationLock.wait()
}
}
}
private def notifyContext() = {
registrationLock.synchronized {
registrationDone = true
registrationLock.notifyAll()
}
}
}
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