Github user andrewor14 commented on a diff in the pull request: https://github.com/apache/spark/pull/2577#discussion_r18238499 --- Diff: yarn/alpha/src/main/scala/org/apache/spark/deploy/yarn/YarnRMClientImpl.scala --- @@ -66,14 +70,16 @@ private class YarnRMClientImpl(args: ApplicationMasterArguments) extends YarnRMC appAttemptId } - override def shutdown(status: FinalApplicationStatus, diagnostics: String = "") = { - val finishReq = Records.newRecord(classOf[FinishApplicationMasterRequest]) - .asInstanceOf[FinishApplicationMasterRequest] - finishReq.setAppAttemptId(getAttemptId()) - finishReq.setFinishApplicationStatus(status) - finishReq.setDiagnostics(diagnostics) - finishReq.setTrackingUrl(uiHistoryAddress) - resourceManager.finishApplicationMaster(finishReq) + override def unregister(status: FinalApplicationStatus, diagnostics: String = "") = synchronized { + if (registered) { + val finishReq = Records.newRecord(classOf[FinishApplicationMasterRequest]) + .asInstanceOf[FinishApplicationMasterRequest] --- End diff -- You probably don't need this cast
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