[https://www.cnblogs.com/qingyunzong/p/8634335.html](https://www.cnblogs.com/qingyunzong/p/8634335.html) ## 查看各主节点的状态 namenode ~~~ hdfs haadmin -getServiceState nn1 ~~~ resourceManager ~~~ yarn rmadmin -getServiceState rm1 ~~~ ## 启动单个namenode ``` hadoop-daemon.sh start namenode ```