Apache NiFi Registry System Administrator's Guide
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The default Authorizer is the StandardManagedAuthorizer, however, you can develop additional Authorizers as extensions. The StandardManagedAuthorizer has the following properties:

Property Name Description

Access Policy Provider

The identifier for an Access Policy Provider defined above.

The managed authorizer is comprised of a UserGroupProvider and a AccessPolicyProvider. The users, group, and access policies will be loaded and optionally configured through these providers. The managed authorizer will make all access decisions based on these provided users, groups, and access policies.

During startup there is a check to ensure that there are no two users/groups with the same identity/name. This check is executed regardless of the configured implementation. This is necessary because this is how users/groups are identified and authorized during access decisions.