yarn 3.2源码分析之ResourceManager

最新推荐文章于 2025-06-05 00:00:00 发布

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最新推荐文章于 2025-06-05 00:00:00 发布 · 925 阅读

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概述

ResourceManager是一系列组件的集合。它会加载core-site.xml和yarn-site.xml，同时创建yarn scheduler、RMAppManager等一系列组件。

创建yarn scheduler

获取yarn.resourcemanager.scheduler.class配置项，默认是CapacityScheduler

 public static final String RM_SCHEDULER = "yarn.resourcemanager.scheduler.class";
    public static final String DEFAULT_RM_SCHEDULER = "org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler"; 

 protected ResourceScheduler createScheduler() {
    //获取yarn.resourcemanager.scheduler.class配置项，默认是CapacityScheduler 
    String schedulerClassName = conf.get(YarnConfiguration.RM_SCHEDULER,
        YarnConfiguration.DEFAULT_RM_SCHEDULER);
    LOG.info("Using Scheduler: " + schedulerClassName);
    try {
      Class<?> schedulerClazz = Class.forName(