hadoop启动报错“ org/apache/hadoop/yarn/server/timelineservice/collector/TimelineCollectorManager”，主要是缺少timelineCollectorManager的jar包，解决方案： 将hadoop3.1.2 版本将share\hadoop\yarn\timelineservice\hadoop-yarn-server-timelineservice-3.1.2.jar放到share\hadoop\yarn\lib 下也可以。
：
