diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java
index b9a3fff8de234..1514ca54a2606 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java
@@ -865,7 +865,7 @@ <T> T invokeOnNs(RemoteMethod method, Class<T> clazz, IOException ioe,
   }
 
   <T> T invokeOnNsAsync(RemoteMethod method, Class<T> clazz, IOException ioe,
-                        Set<FederationNamespaceInfo> nss) throws IOException {
+      Set<FederationNamespaceInfo> nss) throws IOException {
     if (nss.isEmpty()) {
       throw ioe;
     }