Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20424#discussion_r168350555
--- Diff:
core/src/main/scala/org/apache/spark/api/python/PythonWorkerFactory.scala ---
@@ -17,7 +17,7 @@
package org.apache.spark.api.python
-import java.io.{DataInputStream, DataOutputStream, InputStream,
OutputStreamWriter}
+import java.io._
--- End diff --
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