# CentOs安装Hadoop单机伪分布式启动报错处理

CentOs安装Hadoop单机伪分布式启动报错处理

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报错如下

[root@localhost hadoop-3.1.3]# ./sbin/start-dfs.sh
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 [localhost.localdomain]
ERROR: Attempting to operate on hdfs secondarynamenode as root
ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation.

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修改hadoop安装目录下的sbin文件夹下的脚本

[root@localhost sbin]# vi start-dfs.sh 
[root@localhost sbin]# vi stop-dfs.sh 
[root@localhost sbin]# vi start-yarn.sh 
[root@localhost sbin]# vi stop-yarn.sh

分别加上如下内容：

HDFS_DATANODE_USER=root
HADOOP_SECURE_DN_USER=hdfs
HDFS_NAMENODE_USER=root
HDFS_SECONDARYNAMENODE_USER=root

YARN_RESOURCEMANAGER_USER=root
HADOOP_SECURE_DN_USER=yarn
YARN_NODEMANAGER_USER=root