Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/4688#discussion_r25914223
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala ---
@@ -17,15 +17,23 @@
package org.apache.spark.deploy.yarn
-import java.io.File
+import java.io._
+import java.net.URI
+import java.nio.ByteBuffer
+import java.util.concurrent.{ TimeUnit, Executors}
import java.util.regex.Matcher
import java.util.regex.Pattern
import scala.collection.mutable.HashMap
+import scala.collection.JavaConversions._
import scala.util.Try
+import org.apache.hadoop.fs.Options.Rename
+import org.apache.hadoop.fs.{FileUtil, Path, FileSystem}
--- End diff --
nit: sort order (also in other places)
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