Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/4990#discussion_r28531300
--- Diff:
core/src/main/scala/org/apache/spark/deploy/worker/ExternalShuffleService.scala
---
@@ -18,12 +18,15 @@
package org.apache.spark.deploy.worker
import org.apache.spark.{Logging, SparkConf, SecurityManager}
+import org.apache.spark.util.Utils
import org.apache.spark.network.TransportContext
import org.apache.spark.network.netty.SparkTransportConf
import org.apache.spark.network.sasl.SaslRpcHandler
import org.apache.spark.network.server.TransportServer
import org.apache.spark.network.shuffle.ExternalShuffleBlockHandler
+import java.util.concurrent.CountDownLatch
--- End diff --
this needs to be up there above the spark imports (see
https://cwiki.apache.org/confluence/display/SPARK/Spark+Code+Style+Guide)
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