HDFS_NAMENODE_USER, HDFS_DATANODE_USER & HDFS_SECONDARYNAMENODE_USER not defined

Question

I am new to hadoop.
I\'m trying to install hadoop in my laptop in Pseudo-Distributed mode.
I am running it with root user, but I\'m getting the error below.

Answer 1

Vim ${HADOOP_HOME}sbin/start-dfs.sh & ${HADOOP_HOME}sbin/stop-dfs.sh, then add:

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