spark|Spark内核源码深度剖析(Master注册机制原理剖析与源码分析)

1.Master注册机制原理剖析(图解)
【spark|Spark内核源码深度剖析(Master注册机制原理剖析与源码分析)】spark|Spark内核源码深度剖析(Master注册机制原理剖析与源码分析)
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2.部分源码分析
master.scala中的Application注册原理代码分析:

case RegisterApplication(description) => { //如果master的状态是standby,就是当前的这个master,是standby master, //而不是Active Master,那么,当Application来请求注册时,会忽略请求。 if (state == RecoveryState.STANDBY) { // ignore, don't send response } else { logInfo("Registering app " + description.name) //用ApplicationDescription信息,创建ApplicationInfo val app = createApplication(description, sender) //注册Application //将Application加入缓存中,并将Application加入等待调度的队列中-waitingApps registerApplication(app) logInfo("Registered app " + description.name + " with ID " + app.id) //使用持久化引擎,将Application进行持久化 persistenceEngine.addApplication(app) //反向,向SparkDeploySchedulerBackend的APPClient的ClientActor,发送消息,也就是RegisterApplication sender ! RegisteredApplication(app.id, masterUrl) schedule() }

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