Github user kishorvpatil commented on a diff in the pull request:
https://github.com/apache/spark/pull/15009#discussion_r99849329
--- Diff:
core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala ---
@@ -71,6 +100,9 @@ private[spark] abstract class LauncherBackend {
if (connection != null && lastState != state) {
connection.send(new SetState(state))
lastState = state
+ if (!_isConnected && stopOnShutdown) {
--- End diff --
The `LauncherBackend` is supposed to run within `Spark App` JVM. The
`connection` is `LauncherConnection` used to report back Spark Job status to
User App. So, if this connection is lost - the User App requesting/waiting for
the job completion is no longer available. So User app is not available
shutdown flag would decide whether to kill the Spark job or not.
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