diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterPermissionChecker.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterPermissionChecker.java
index 3d8ef219421..b1e68b6de83 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterPermissionChecker.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterPermissionChecker.java
@@ -126,7 +126,7 @@ public class RouterPermissionChecker extends FSPermissionChecker {
     }
 
     // Is the user a member of the super group?
-    List<String> groups = Arrays.asList(ugi.getGroupNames());
+    List<String> groups = ugi.getGroups();
     if (groups.contains(superGroup)) {
       return;
     }