We are using Livy 0.7.0 with CDH 6.3 version. We are able to submit the job through Livy to CDH Cluster. We wanted to restrict the User access to the Livy session through Livy ACL.  As per the Apache Documentation added the below parameter values and restarted the Livy. But still livy is allowing all the users to access.    Any other settings needs to be enabled for ACL to work.   # Whether to enable Livy server access control, if it is true then all the income requests will # be checked if the requested user has permission. # livy.server.access-control.enabled = false livy.server.access-control.enabled=true # Allowed users to access Livy, by default any user is allowed to access Livy. If user want to # limit who could access Livy, user should list all the permitted users with comma separated. livy.server.access-control.allowed-users = raj   Thanks Raj ... View more