Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/1810#discussion_r16218675
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisorImpl.scala
---
@@ -20,22 +20,21 @@ package org.apache.spark.streaming.receiver
import java.nio.ByteBuffer
import java.util.concurrent.atomic.AtomicLong
-import scala.collection.mutable.{SynchronizedBuffer, ArrayBuffer}
+import scala.collection.mutable.ArrayBuffer
import scala.concurrent.Await
import akka.actor.{Actor, Props}
import akka.pattern.ask
+import com.google.common.base.Throwables
+
import org.apache.spark.{Logging, SparkEnv}
-import org.apache.spark.storage.StreamBlockId
import org.apache.spark.streaming.scheduler._
import org.apache.spark.util.{Utils, AkkaUtils}
import org.apache.spark.storage.StreamBlockId
import org.apache.spark.streaming.scheduler.DeregisterReceiver
import org.apache.spark.streaming.scheduler.AddBlock
-import scala.Some
import org.apache.spark.streaming.scheduler.RegisterReceiver
-import com.google.common.base.Throwables
--- End diff --
just some import cleanups here
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