MapR 5.0 Documentation : Connecting to WebHCat

The method that WebHCat clients use to connect to WebHCat is based on the WebHCat Authentication method: 

WebHCat AuthenticationConnection Requirements
Simple

Clients pass the username as the user.name parameter in the REST call. No password is required. 
Example: 
http://<hostname>:50111/templeton/v1/ddl/database/default/table/table01?user.name=juser

PAM

Clients enter username and password authentication through a pop-up dialog box in the web browser session.

Kerberos with SPNEGO

Clients can use one of the following methods:

With either method you must also have a Kerberos ticket in the cache. See Example: Generating a Kerberos Ticket