@J. D. Bacolod Can you post content of knox_sample and default topologies? 404 error show topology deployment issue and 401 means problem authenticating. You can check if Knox and Demo LDAP is working properly by logging in to Knox Host and issue below command: curl -iku admin:admin-password -X GET 'https://localhost:8443/gateway/admin/api/v1/version' This should return Knox Server version, something similar to below: HTTP/1.1 200 OK Date: Mon, 30 Jan 2017 09:06:35 GMT Set-Cookie: JSESSIONID=12phoc1xgseuiwm1m48kvs6cw;Path=/gateway/admin;Secure;HttpOnly Expires: Thu, 01 Jan 1970 00:00:00 GMT Set-Cookie: rememberMe=deleteMe; Path=/gateway/admin; Max-Age=0; Expires=Sun, 29-Jan-2017 09:06:35 GMT Content-Type: application/xml Content-Length: 170 Server: Jetty(9.2.15.v20160210) <?xml version="1.0" encoding="UTF-8"?> <ServerVersion> <version>0.11.0.2.6.0.0-405</version> <hash>b4ad4748eeff4c9b9493a0cc082a0825200c4668</hash> </ServerVersion> ... View more

Apache Knox uses Shiro for LDAP authentication. You can put the details of your LDAP server and port in topology file. Knox will use the LDAP Server IP Address and Port to communicate. If you are using OpenLDAP to authenticate, you can safely stop Demo LDAP service in Knox. Yes you need to install openldap, openldap-clients, and openldap-servers package. ... View more

Did you followed this https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.4.0/bk_Ranger_Install_Guide/content/configuring_mysql_for_ranger.html and run those MySQL queries? ... View more

Can you follow this document https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.0/bk_Ranger_Install_Guide/content/configuring_mysql_for_ranger.html Also if you can provide a screenshot or log file, it will be helpful. ... View more

@Kaliyug Antagonist HDP 2.4.0 has Zeppelin Tech Preview only, this issue can not be found in Zeppelin with HDP 2.5.0 which is the version officially supported. ... View more

The earlier created local Ambari "ambari_admin" user should exist even after ldap sync. Please select "All" as Type in Manage Ambari -> User+Group Management section, your user should show up there. ... View more

@Arun A K If you have existing admin user in your AD/LDAP, it will be override the existing Ambari admin user. This is known behaviour. ... View more

Try Distinguished name attribute* (dn): dn ... View more