hadoop启动报错：Attempting to operate on hdfs namenode as root

刺骨的言语ヽ痛彻心扉 2022-10-17 10:43 18阅读 0赞

解决方案1：

在环境变量中添加如下几个配置：

vim /etc/profile

添加

export HDFS\_NAMENODE\_USER=root  
export HDFS\_DATANODE\_USER=root  
export HDFS\_SECONDARYNAMENODE\_USER=root  
export YARN\_RESOURCEMANAGER\_USER=root  
export YARN\_NODEMANAGER\_USER=root

解决方案2：

写在最前注意：  
1、master，slave都需要修改start-dfs.sh，stop-dfs.sh，start-yarn.sh，stop-yarn.sh四个文件  
2、如果你的Hadoop是另外启用其它用户来启动，记得将root改为对应用户

HDFS格式化后启动dfs出现以下错误：

[root@master sbin]# ./start-dfs.sh
    Starting namenodes on [master]
    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 [slave1]
    ERROR: Attempting to operate on hdfs secondarynamenode as root
    ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation.

查度娘，见一仁兄的博客有次FAQ，故参考处理顺便再做一记录  
参考地址：[https://blog.csdn.net/u013725455/article/details/70147331][https_blog.csdn.net_u013725455_article_details_70147331]

在/hadoop/sbin路径下：  
将start-dfs.sh，stop-dfs.sh两个文件顶部添加以下参数

#!/usr/bin/env bash
    HDFS_DATANODE_USER=root
    HADOOP_SECURE_DN_USER=hdfs
    HDFS_NAMENODE_USER=root
    HDFS_SECONDARYNAMENODE_USER=root

还有，start-yarn.sh，stop-yarn.sh顶部也需添加以下：

#!/usr/bin/env bash
    YARN_RESOURCEMANAGER_USER=root
    HADOOP_SECURE_DN_USER=yarn
    YARN_NODEMANAGER_USER=root
    
    
    # Licensed to the Apache Software Foundation (ASF) under one or more

修改后重启 ./start-dfs.sh，成功！

[root@master sbin]# ./start-dfs.sh
    WARNING: HADOOP_SECURE_DN_USER has been replaced by HDFS_DATANODE_SECURE_USER. Using value of HADOOP_SECURE_DN_USER.
    Starting namenodes on [master]
    上一次登录：日 6月  3 03:01:37 CST 2018从 slave1pts/2 上
    master: Warning: Permanently added 'master,192.168.43.161' (ECDSA) to the list of known hosts.
    Starting datanodes
    上一次登录：日 6月  3 04:09:05 CST 2018pts/1 上
    Starting secondary namenodes [slave1]
    上一次登录：日 6月  3 04:09:08 CST 2018pts/1 上

[https_blog.csdn.net_u013725455_article_details_70147331]: https://blog.csdn.net/u013725455/article/details/70147331