Restarting NiFi nodes fails with an error message such as the one below: <br>File "/var/lib/ambari-agent/cache/common-services/NIFI/1.0.0/package/scripts/nifi.py", line 278, in Master().execute() File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 353, in execute method(env) File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 993, in restart self.start(env, upgrade_type=upgrade_type) File "/var/lib/ambari-agent/cache/common-services/NIFI/1.0.0/package/scripts/nifi.py", line 152, in start nifi_cli.create_or_update_reg_client(params.nifi_registry_host, params.nifi_registry_url) File "/u/var/lib/ambari-agent/cache/common-services/NIFI/1.0.0/package/scripts/nifi_cli.py", line 175, in create_or_update_reg_client existing_clients = list_reg_clients() File "/u/var/lib/ambari-agent/cache/common-services/NIFI/1.0.0/package/scripts/nifi_cli.py", line 144, in list_reg_clients outputType="json" File "/u/var/lib/ambari-agent/cache/common-services/NIFI/1.0.0/package/scripts/nifi_cli.py", line 73, in nifi_cli raise Fail("Failed to execute nifi cli.sh command") Cause: This occurs when the nifi.initial.admin.identity does not have permission to access the /controller API. Workaround: Create a local user in Ranger with the name of the initial admin idenity Add a Ranger Policy for NiFi with Read/Write permissions for /controller ... View more