@Prateek Behera
You can find more information about the "dfs.cluster.administrators" property which sets the ACL-for-admins. The administrators for the cluster specified as an ACL. This controls who can access the default servlets, etc. in the HDFS.
We can set this property with a comma separated value containing list of users or groups who can access and execute these administrative commands from any host.
Example:
<property>
<name>dfs.cluster.administrators</name>
<value>testuser1,testuser2,testuser3,testgroup1,testgroup2</value>
</property>
.
NOTE: by default the property "dfs.cluster.administrators" value is set to "hdfs"