- 某次打开很久不用的虚拟机，使用root账号登陆hdfs时候报了以下错误
[root@hadoop102 hadoop]# start-dfs.sh Starting namenodes on [hadoop102] ERROR: Attempting to operate on hdfs namenode as root ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation. Starting datanodes ERROR: Attempting to operate on hdfs datanode as root ERROR: but there is no HDFS_DATANODE_USER defined. Aborting operation. Starting secondary namenodes [hadoop104] ERROR: Attempting to operate on hdfs secondarynamenode as root ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation. 2021-12-01 14:29:33,020 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
- 进入sbin目录，在start-dfs.sh，stop-dfs.sh，start-yarn.sh，stop-yarn.sh四个文件顶部添加参数
- 在start-dfs.sh，stop-dfs.sh两个文件顶部添加如下参数
#!/usr/bin/env bash HDFS_DATANODE_USER=root HADOOP_SECURE_DN_USER=hdfs HDFS_NAMENODE_USER=root HDFS_SECONDARYNAMENODE_USER=root
- 在start-yarn.sh，stop-yarn.sh顶部添加如下参数
#!/usr/bin/env bash YARN_RESOURCEMANAGER_USER=root HADOOP_SECURE_DN_USER=yarn YARN_NODEMANAGER_USER=root
之后就可以使用root账号登陆hdfs和yarn了
