diff --git a/helix-rest/src/main/java/org/apache/helix/rest/common/StoppableInstancesSelector.java b/helix-rest/src/main/java/org/apache/helix/rest/common/StoppableInstancesSelector.java
index 63c3943457..b12b3d2f14 100644
--- a/helix-rest/src/main/java/org/apache/helix/rest/common/StoppableInstancesSelector.java
+++ b/helix-rest/src/main/java/org/apache/helix/rest/common/StoppableInstancesSelector.java
@@ -1,5 +1,24 @@
 package org.apache.helix.rest.common;
 
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -19,24 +38,6 @@
 import org.apache.helix.rest.server.json.cluster.ClusterTopology;
 import org.apache.helix.rest.server.json.instance.StoppableCheck;
 
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
 public class StoppableInstancesSelector {
   // This type does not belong to real HealthCheck failed reason. Also, if we add this type
   // to HealthCheck enum, it could introduce more unnecessary check step since the InstanceServiceImpl
@@ -116,10 +117,9 @@ public void getStoppableInstancesCrossZones() {
    *
    * If `isRandom` is true, the order of zones will be randomized regardless of any previous order.
    *
-   * @param isRandom Indicates whether to randomize the order of zones.
+   * @param random Indicates whether to randomize the order of zones.
    */
-  public void calculateOrderOfZone(boolean isRandom) {
-    // If the orderedZones is not specified, we will order all zones by their instances count in descending order.
+  public void calculateOrderOfZone(boolean random) {
     if (_orderOfZone == null) {
       _orderOfZone =
           new ArrayList<>(getOrderedZoneToInstancesMap(_clusterTopology.toZoneMapping()).keySet());
@@ -129,7 +129,7 @@ public void calculateOrderOfZone(boolean isRandom) {
       return;
     }
 
-    if (isRandom) {
+    if (random) {
       Collections.shuffle(_orderOfZone);
     }
   }