HADOOP3 Attempting to operate on hdfs namenode as root

1、vi /etc/profile 添加一下内容

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

2、在start-dfs.sh、start-yarn.sh添加也可以