@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" ... View more

@Prateek Behera When exactly do you see this error ? What is the Heap Size for your NmaeNode ? NameNode heap size depends on many factors, such as the number of files, the number of blocks, and the load on the system. Can you please check the following link to know the recommended heap size for NameNode and verify your Name Noe heap settings: https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.6.4/bk_command-line-installation/content/configuring-namenode-heap-size.html ... View more

@Prateek Behera The disk quota in your case works fine as expected. HDFS by default has a replication factor of 3 as you can see in the 3rd column of your CLI output. 500MB *3 (replication factor) = 1.5 GB > 1GB (quota). ... View more