解决hadoop启动报错ERROR: Attempting to operate on hdfs namenode as root的方法

hadoop-3.1.0启动hadoop集群时还有可能可能会报如下错误:

[root@localhost sbin]# start-all.sh

Starting namenodes on [hadoop]

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 [hadoop]

ERROR: Attempting to operate on hdfs secondarynamenode as root

ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation.

2018-07-16 05:45:04,628 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-Java classes where applicable

Starting resourcemanager

ERROR: Attempting to operate on yarn resourcemanager as root

ERROR: but there is no YARN_RESOURCEMANAGER_USER defined. Aborting operation.

Starting nodemanagers

ERROR: Attempting to operate on yarn KHlOrknodemanager as root

ERROR: but there is no YjavascriptARN_NODEMANAGER_USER defined. Aborting operation.

解决方案一：

输入如下命令，在环境变量中添加下面的配编程置

vi /etc/profile

然后向里面加入如下的内容

ex编程客栈port HDFS_NAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_SECONDARYNAMENODE_USER=root
export YARN_RESOURCEMANAGER_USER=ro开发者_Ubuntuot
export YARN_NODEMANAGER_USER=root

输入如下命令使改动生效

source /etc/profile

 解决方案二：

将start-dfs.sh，stop-dfs.sh(在hadoop安装目录的sbin里)两个文件顶部添加以下参数

HDFS_DATANODE_USER=root
HADOOP_SECURE_DN_USER=hdfs
HDFS_NAMENODE_Uhttp://www.devze.comSER=root
HDFS_SECONDARYNAMENODE_USER=root

将start-yarn.sh，stop-yarn.sh(在hadoop安装目录的sbin里)两个文件顶部添加以下参数

YARN_RESOURCEMANAGER_USER=root
HADOOP_SECURE_DN_USER=yarn
YARN_NODEMANAGER_USER=root

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