hadoop集群启动失败YARN_RESOURCEMANAGER_USER=root HADOOP_SECURE_DN_USER=yarn YARN_NODEMANAGER_USER=root_error: attempting to operate on yarn nodemanager a

 

[root@hadoop102 job]# myhadoop.sh start
 =================== 启动 hadoop集群 ===================
 --------------- 启动 hdfs ---------------
Starting namenodes on [hadoop102]
Starting datanodes
ERROR: Attempting to operate on hdfs namenode as root
ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation.
ERROR: Attempting to operate on hdfs datanode as root
ERROR: but there is no HDFS_DATANODE_USER defined. Aborting operation.
Starting secondary namenodes [hadoop104]
ERROR: Attempting to operate on hdfs secondarynamenode as root
ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation.
 --------------- 启动 yarn ---------------
Starting resourcemanager
Starting nodemanagers
ERROR: Attempting to operate on yarn resourcemanager as root
ERROR: but there is no YARN_RESOURCEMANAGER_USER defined. Aborting operation.
ERROR: Attempting to operate on yarn nodemanager as root
ERROR: but there is no YARN_NODEMANAGER_USER defined. Aborting operation.
 --------------- 启动 historyserver ---------------
historyserver is running as process 13059.  Stop it first.
 

错误原因：

Hadoop中没有默认root的用户，需要手动添加 

两种解决方法 

1、输入如下命令，在环境变量中添加下面的配置 ，然后向里面加入如下的内容。输入命令使改动生效

vi /etc/profile

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

source /etc/profile

 

 

 2、方案1不成功使用2方案hadoop中sbin路径下文件

添加再顶部

vim start-dfs.sh
添加：
	HDFS_DATANODE_USER=root
	HADOOP_SECURE_DN_USER=hdfs
	HDFS_NAMENODE_USER=root
	HDFS_SECONDARYNAMENODE_USER=root

vim stop-dfs.sh
添加：
	HDFS_DATANODE_USER=root
	HADOOP_SECURE_DN_USER=hdfs
	HDFS_NAMENODE_USER=root
	HDFS_SECONDARYNAMENODE_USER=root

vim start-yarn.sh
添加：
	YARN_RESOURCEMANAGER_USER=root
	HADOOP_SECURE_DN_USER=yarn
	YARN_NODEMANAGER_USER=root

vim stop-yarn.sh
添加：
	YARN_RESOURCEMANAGER_USER=root
	HADOOP_SECURE_DN_USER=yarn
	YARN_NODEMANAGER_USER=root

vim  /etc/selinux/config 
修改：
	SELINUX=enforcing 改为 SELINUX=disabled

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