I'm using CDH 5.1.0, which bundles Spark 1.0.0 with it. Following How-to: Run a Simple Apache Spark App in CDH 5 <http://blog.cloudera.com/blog/2014/04/how-to-run-a-simple-apache-spark-app-in-cdh-5/> , I tried to submit my job in local mode, Spark Standalone mode and YARN mode. I successfully submitted my job in local mode and Standalone mode, however, I noticed the following messages printed on console when I submitted my job in YARN mode:
14/08/29 22:27:29 INFO Client: Submitting application to ASM 14/08/29 22:27:29 INFO YarnClientImpl: Submitted application application_1406949333981_0015 14/08/29 22:27:29 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:30 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:31 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:32 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:33 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:34 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:35 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:36 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:37 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:38 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: -1 appStartTime: 1409365649836 yarnAppState: ACCEPTED 14/08/29 22:27:39 INFO YarnClientSchedulerBackend: Application report from ASM: appMasterRpcPort: 0 appStartTime: 1409365649836 yarnAppState: RUNNING The job finished successfully and produced correct results. But I'm not sure what those messages mean? Does "appMasterRpcPort: -1" indicate an error or exception ? Thanks
