Github user lvdongr commented on the issue:
https://github.com/apache/spark/pull/17620
You can see the main method in Master.scala.
def main(argStrings: Array[String]) {
Utils.initDaemon(log)
val conf = new SparkConf
val args = new MasterArguments(argStrings, conf)
val (rpcEnv, _, _) = startRpcEnvAndEndpoint(args.host, args.port,
args.webUiPort, conf)
rpcEnv.awaitTermination()
}
When the rpcEnv is shut down,the main method will finish,and Master process
will stop as I test already. I choose this way ,because the onstop method will
be called before stopping master.So the service in master will also be
closed,such as webui,metrics,persistenceEngine. I think it will be safer.
Thank you for your last reply @jerryshao
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