hadoop - HDFS_NAMENODE_USER、HDFS_DATANODE_USER 和 HDFS_SECONDARYNAMENODE_USER 未定义

Question

我是 hadoop 新手。
我正在尝试以伪分布式模式在我的笔记本电脑中安装 hadoop。
我使用 root 用户运行它，但出现以下错误。

root@debdutta-Lenovo-G50-80:~# $HADOOP_PREFIX/sbin/start-dfs.sh
WARNING: HADOOP_PREFIX has been replaced by HADOOP_HOME. Using value of HADOOP_PREFIX.
Starting namenodes on [localhost]
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 [debdutta-Lenovo-G50-80]
ERROR: Attempting to operate on hdfs secondarynamenode as root
ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation.
WARNING: HADOOP_PREFIX has been replaced by  HADOOP_HOME. Using value of HADOOP_PREFIX.

此外，我必须在 root 用户中运行 hadoop，因为 hadoop 无法通过其他用户访问 ssh 服务。
如何解决同样的问题？

Answer 1

只做它要求你做的事:

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"