attilapiros commented on a change in pull request #28094:
URL: https://github.com/apache/spark/pull/28094#discussion_r417460822
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File path: core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
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@@ -21,6 +21,7 @@ import java.util.{Properties, UUID}
import scala.collection.JavaConverters._
import scala.collection.Map
+import scala.util.control.NonFatal
Review comment:
Not needed.
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