> So If i want to fetch all defined mapreduce properties,can i use this Api or it does have any pre-requisites? Yes you can. The default role group mostly always exists even if role instances do not, but if not (such as in a heavily API driven install) you can create one before you fetch. > Also does it require any privileges to access this api? A read-only user should also be able to fetch configs as a GET call over API. However, if there are configs marked as secured (such as configs that carry passwords, etc.) then the value retrieval will require admin privileges - they will otherwise appear redacted. ... View more