Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/22881#discussion_r229103471
--- Diff: core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
---
@@ -26,11 +27,12 @@ import scala.collection.JavaConverters._
import scala.collection.immutable.Map
import scala.collection.mutable
import scala.collection.mutable.HashMap
+import scala.util.Try
--- End diff --
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