organize imports

Author: mengxr

core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala

@@ -21,16 +21,16 @@ import java.nio.ByteBuffer
 
 import scala.concurrent.Await
 
-import akka.actor._
-import akka.remote._
+import akka.actor.{Actor, ActorSelection, Props}
 import akka.pattern.Patterns
+import akka.remote.{RemotingLifecycleEvent, DisassociatedEvent}
 
-import org.apache.spark.{SparkEnv, Logging, SecurityManager, SparkConf}
+import org.apache.spark.{Logging, SecurityManager, SparkConf, SparkEnv}
 import org.apache.spark.TaskState.TaskState
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.deploy.worker.WorkerWatcher
-import org.apache.spark.scheduler.cluster.CoarseGrainedClusterMessages._
 import org.apache.spark.scheduler.TaskDescription
+import org.apache.spark.scheduler.cluster.CoarseGrainedClusterMessages._
 import org.apache.spark.util.{AkkaUtils, Utils}
 
 private[spark] class CoarseGrainedExecutorBackend(

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

@@ -20,9 +20,7 @@ package org.apache.spark.scheduler.cluster
 import java.nio.ByteBuffer
 
 import org.apache.spark.TaskState.TaskState
-import org.apache.spark.scheduler.TaskDescription
 import org.apache.spark.util.{SerializableBuffer, Utils}
-import org.apache.spark.SparkConf
 
 private[spark] sealed trait CoarseGrainedClusterMessage extends Serializable