Github user jiangxb1987 commented on a diff in the pull request: https://github.com/apache/spark/pull/20893#discussion_r177362825 --- Diff: core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala --- @@ -114,10 +114,10 @@ private[spark] abstract class LauncherBackend { override def close(): Unit = { try { + _isConnected = false super.close() } finally { onDisconnected() --- End diff -- I know your meaning, but I'm not referring to `isConnected`, I mean `onDisconnected` seems not doing anything on Spark side.
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