1、问题描述
hadoop-3.1.3启动hadoop集群时会报如下错误:
[root@bigdata111 hadoop-3.1.3]# sbin/start-dfs.sh
Starting namenodes on [bigdata111]
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 [bigdata113]
ERROR: Attempting to operate on hdfs secondarynamenode as root
ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation.
2、解决方法
在命令行输入命令:
vim /etc/profile
然后在环境变量中添加如下内容:
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
最后,source一下环境变量
source /etc/profile
3、结果
再次启动就不会报错了