job运行流程（3）---NodeManager运行APPLICATION

11、接着上篇文章ApplicationMasterLaunch.handle(AMLaunchEventType.LAUNCH)被触发，接着开始调用RPC服务向NodeManager请求启动container,并触发RMAppAttemptEventType.LAUNCHED事件;   12、调用ContainerManagementProtocolPBClientImpl.startConta

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