Github user aarondav commented on a diff in the pull request:
https://github.com/apache/spark/pull/1274#discussion_r14418939
--- Diff:
core/src/main/scala/org/apache/spark/storage/DiskBlockManager.scala ---
@@ -26,6 +26,8 @@ import org.apache.spark.executor.ExecutorExitCode
import org.apache.spark.network.netty.{PathResolver, ShuffleSender}
import org.apache.spark.util.Utils
+import scala.collection.mutable.ArrayBuffer
--- End diff --
nit: this "scala.*" import should go into their own block in between the
java.* and org.* imports. See our [style
guide](https://cwiki.apache.org/confluence/display/SPARK/Spark+Code+Style+Guide#SparkCodeStyleGuide-Imports).
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