@shamika NiFi based authorization is case sensitive. 2023-07-12 10:46:40,800 INFO [NiFi Web Server-19] o.a.n.w.a.c.AccessDeniedExceptionMapper identity[myuser], groups[bigG, bigdGer] does not have permission to access the requested resource. No applicable policies could be found. Returning Forbidden response the nifi-user.log is telling you that your successfully authenticated user "myuser" is known by NiFi to belong to groups "bigG" and "bigdGer". In Ranger you'll need to make sure that yoru user "myuser" or one of these groups "bigG" and/or "bigdGer" has been authorized for "READ" on the "/flow" NiFi resource Identifier. If Ranger has the group as "bigg" or "BIGG", "bigDGER", etc it will not work because NiFi is case sensitive. You could also share your authorizers.xml if you'd like use to verify your configuration there. If you found that the provided solution(s) assisted you with your query, please take a moment to login and click Accept as Solution below each response that helped. Thank you, Matt
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