requirement for ACLs

[#1]

I have a document showing how to set ACLs in hadoop but it has a pre-requisite of setting the following policy. but this policy is missing from my HDP 2.5 ?

set the "dfs.namenode.acls.enabled" to true (HDFS configs).

[#2 · Accepted solution]

By default, ACLs are disabled, so you'll have to add the property to HDFS service.

1. In Ambari, select the HDFS service.
2. Select the Configs tab.
3. Find or scroll to "Custom hdfs-site"
4. Click Add Property.
5. Enter the value: dfs.namenode.acls.enabled=true
6. Save your changes and add a comment.

[#3]

Do I need to restart the services.I added the below property but no luck.

dfs.namenode.acls.enabled=true

[#4]

Read below very good article about HDFS Acls:

https://hortonworks.com/blog/hdfs-acls-fine-grained-permissions-hdfs-files-hadoop/

As mentioned by @bhagan, Acls are turned off by default. You would need to enable them by setting dfs.namenode.acls.enabled=true in hdfs-site