https://community.cloudera.com/t5/Support-Questions/NiFi-and-NiFi-Registry-authentication-error/m-p/204726#M166715 <P>You will need machine names (DN) for both Nifi and Nifi Registry like "CN=machinename,...dc=example,dc=com" where in CN you will use server name the remaining portion will come under whatever wildcard (sub)domain you have.</P><P>Then you will enter the full DN, manually as a user in both Nifi and Nifi Registry. This method is similar to when setting up site-to-site policies here:</P><P><A href="https://community.hortonworks.com/articles/88473/site-to-site-communication-between-secured-https-a.html" target="_blank">https://community.hortonworks.com/articles/88473/site-to-site-communication-between-secured-https-a.html</A></P><P>Finally, you can check logs files for errors when pulling buckets in both Nifi and Nifi registry in files *-app.log and *-user.log, this may as well give you a full DN Nifi is looking for.</P> Tue, 29 May 2018 21:05:47 GMT umair_khan 2018-05-29T21:05:47Z