#8615 fix DeleteUserSubCommand command failed when acl2.0 authenticat…

…ion enabled and authorization disabled

auth/src/main/java/org/apache/rocketmq/auth/authentication/manager/AuthenticationMetadataManagerImpl.java

@@ -146,7 +146,8 @@ public CompletableFuture<Void> deleteUser(String username) {
                 throw new AuthenticationException("username can not be blank");
             }
             CompletableFuture<Void> deleteUser = this.getAuthenticationMetadataProvider().deleteUser(username);
-            CompletableFuture<Void> deleteAcl = this.getAuthorizationMetadataProvider().deleteAcl(User.of(username));
+            CompletableFuture<Void> deleteAcl = this.getAuthorizationMetadataProvider() == null ? CompletableFuture.completedFuture(null)
+                    : this.getAuthorizationMetadataProvider().deleteAcl(User.of(username));
             return CompletableFuture.allOf(deleteUser, deleteAcl);
         } catch (Exception e) {
             this.handleException(e, result);
@@ -214,9 +215,6 @@ private AuthenticationMetadataProvider getAuthenticationMetadataProvider() {
     }
 
     private AuthorizationMetadataProvider getAuthorizationMetadataProvider() {
-        if (authorizationMetadataProvider == null) {
-            throw new IllegalStateException("The authorizationMetadataProvider is not configured");
-        }
         return authorizationMetadataProvider;
     }
 }

auth/src/test/java/org/apache/rocketmq/auth/authentication/manager/AuthenticationMetadataManagerTest.java

@@ -138,6 +138,10 @@ public void deleteUser() {
         Assert.assertNull(user);
 
         this.authenticationMetadataManager.deleteUser("no_user").join();
+
+        this.authConfig.setAuthorizationEnabled(false);
+        this.authenticationMetadataManager = AuthenticationFactory.getMetadataManager(this.authConfig);
+        this.authenticationMetadataManager.deleteUser("no_user").join();
     }
 
     @Test