@wbivp You need to create /proxy policy for Nifi in ranger, Refer to below document for more info   https://community.cloudera.com/t5/Community-Articles/NiFi-Ranger-based-policy-descriptions/ta-p/246586 https://docs.cloudera.com/HDPDocuments/HDP3/HDP-3.1.4/authorization-ranger/content/resource_policy_create_a_nifi_policy.html ... View more

@ajck  Can you share the stack trace of the error ... View more

@enirys Free ipa with Ambari 2.6.x  is not supported, Free ipa is supported from Ambari 2.7.x onwards     ... View more

@enirys In Ambari 2.7.x below tables should exists whether your cluster is kerberized or not   Can you check and confirm does below table exists in Ambari DB   kerberos_descriptor kerberos_keytab kerberos_keytab_principal kerberos_principal key_value_store kkp_mapping_service   ... View more

@SSRIL Can you check the ambari server logs which are getting generating while clicking on Save button in the repository page ... View more

@enirys  Follow the below steps on ambari db 1. Take ambari DB backup 2. Execute the below mentioned SQL commands on ambari DB    # DELETE FROM ambari.kkp_mapping_service where kkp_id in (select kkp_id from ambari.kerberos_keytab_principal where principal_name = 'HTTP/cnode28.26f5de01-5e40-4d8a-98bd-a4353b7bf5e3.datalake@26F5DE01-5E40-4D8A-98BD-A4353B7BF5E3.DATALAKE'); # DELETE FROM kerberos_keytab_principal WHERE principal_name='HTTP/cnode28.26f5de01-5e40-4d8a-98bd-a4353b7bf5e3.datalake@26F5DE01-5E40-4D8A-98BD-A4353B7BF5E3.DATALAKE'; # DELETE FROM kerberos_principal WHERE principal_name='HTTP/cnode28.26f5de01-5e40-4d8a-98bd-a4353b7bf5e3.datalake@26F5DE01-5E40-4D8A-98BD-A4353B7BF5E3.DATALAKE';  3. After executing above command restart ambari server and regenerate the keytabs ... View more