Fixes to CoarseMesosScheduler

core/src/main/scala/spark/scheduler/mesos/CoarseMesosScheduler.scala

@@ -64,7 +64,7 @@ class CoarseMesosScheduler(
     def receive = {
       case RegisterSlave(slaveId, host) =>
         slaveActor(slaveId) = sender
-        logInfo("Slave actor: " + sender)
+        logInfo("Registered slave: " + sender + " with ID " + slaveId)
         slaveHost(slaveId) = host
         freeCores(slaveId) = coresPerSlave
         makeFakeOffers()
@@ -96,7 +96,7 @@ class CoarseMesosScheduler(
     }
   }
 
-  val masterActor: ActorRef = actorSystem.actorOf(Props[MasterActor], name = actorName)
+  val masterActor: ActorRef = actorSystem.actorOf(Props(new MasterActor), name = actorName)
 
   val taskIdsOnSlave = new HashMap[String, HashSet[String]]
 
@@ -284,24 +284,28 @@ class WorkerTask(slaveId: String, host: String) extends Task[Unit](-1) {
   generation = 0
 
   def run(id: Int): Unit = {
-    val actorSystem = SparkEnv.get.actorSystem
-    val actor = actorSystem.actorOf(Props(new WorkerActor(slaveId, host)), name = "WorkerActor")
+    val env = SparkEnv.get
+    val classLoader = currentThread.getContextClassLoader
+    val actor = env.actorSystem.actorOf(
+      Props(new WorkerActor(slaveId, host, env, classLoader)),
+      name = "WorkerActor")
+    // Wait forever so that our Mesos task doesn't end
     while (true) {
       Thread.sleep(10000)
     }
   }
 }
 
-class WorkerActor(slaveId: String, host: String) extends Actor with Logging {
-  val env = SparkEnv.get
-  val classLoader = currentThread.getContextClassLoader
+class WorkerActor(slaveId: String, host: String, env: SparkEnv, classLoader: ClassLoader)
+  extends Actor with Logging {
+
   val threadPool = new ThreadPoolExecutor(
     1, 128, 600, TimeUnit.SECONDS, new SynchronousQueue[Runnable])
 
   val masterIp: String = System.getProperty("spark.master.host", "localhost")
   val masterPort: Int = System.getProperty("spark.master.port", "7077").toInt
   val masterActor = env.actorSystem.actorFor(
-    "akka://spark@%s:%s/%s".format(masterIp, masterPort, "CoarseMesosScheduler"))
+    "akka://spark@%s:%s/user/%s".format(masterIp, masterPort, "CoarseMesosScheduler"))
 
   class TaskRunner(desc: MTaskInfo)
   extends Runnable {