dongjoon-hyun commented on a change in pull request #28708:
URL: https://github.com/apache/spark/pull/28708#discussion_r446475030
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File path: core/src/main/scala/org/apache/spark/SparkContext.scala
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@@ -57,7 +57,7 @@ import org.apache.spark.resource._
import org.apache.spark.resource.ResourceUtils._
import org.apache.spark.rpc.RpcEndpointRef
import org.apache.spark.scheduler._
-import org.apache.spark.scheduler.cluster.StandaloneSchedulerBackend
+import org.apache.spark.scheduler.cluster.{CoarseGrainedSchedulerBackend,
StandaloneSchedulerBackend}
Review comment:
If this is not required, shall we revert this file?
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