uros-b commented on code in PR #56736:
URL: https://github.com/apache/spark/pull/56736#discussion_r3472537560


##########
core/src/main/scala/org/apache/spark/deploy/Client.scala:
##########
@@ -180,11 +180,14 @@ private class ClientEndpoint(
           System.exit(-1)
         case _ =>
           state.get match {
-            case DriverState.FINISHED | DriverState.FAILED |
-                 DriverState.ERROR | DriverState.KILLED =>
+            case DriverState.FINISHED =>
               logInfo(log"State of driver ${MDC(DRIVER_ID, 
submittedDriverID)}" +
                 log" is ${MDC(DRIVER_STATE, state.get)}, exiting spark-submit 
JVM.")
               System.exit(0)
+            case DriverState.FAILED | DriverState.ERROR | DriverState.KILLED =>

Review Comment:
   ClientSuite.scala has zero coverage of reportDriverStatus, and the logic 
calls System.exit directly (no injectable exitFn) so it is untestable as 
written. "Relying on existing CI integration test suites" is not credible as a 
testing strategy; please consider an injectable exit hook + a 
terminal-state→exit-code unit test.



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