diff --git a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/entity/IntValues.java b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/entity/IntValues.java
index 20f15ef35..720fbf482 100644
--- a/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/entity/IntValues.java
+++ b/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/query/entity/IntValues.java
@@ -20,13 +20,13 @@ package org.apache.skywalking.oap.server.core.query.entity;
 
 import java.util.LinkedList;
 import java.util.List;
-import lombok.Getter;
 
 /**
  * @author peng-yongsheng
  */
 public class IntValues {
-    @Getter private List<KVInt> values = new LinkedList<>();
+
+    private List<KVInt> values = new LinkedList<>();
 
     public void addKVInt(KVInt e) {
         values.add(e);
diff --git a/oap-server/server-storage-plugin/storage-elasticsearch-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/elasticsearch/query/MetricsQueryEsDAO.java b/oap-server/server-storage-plugin/storage-elasticsearch-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/elasticsearch/query/MetricsQueryEsDAO.java
index 38e93e463..fde2d6d4f 100644
--- a/oap-server/server-storage-plugin/storage-elasticsearch-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/elasticsearch/query/MetricsQueryEsDAO.java
+++ b/oap-server/server-storage-plugin/storage-elasticsearch-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/elasticsearch/query/MetricsQueryEsDAO.java
@@ -81,7 +81,7 @@ public class MetricsQueryEsDAO extends EsDAO implements IMetricsQueryDAO {
             KVInt kvInt = new KVInt();
             kvInt.setId(idBucket.getKeyAsString());
             kvInt.setValue(value);
-            intValues.getValues().add(kvInt);
+            intValues.addKVInt(kvInt);
         }
         return intValues;
     }
@@ -115,7 +115,7 @@ public class MetricsQueryEsDAO extends EsDAO implements IMetricsQueryDAO {
                 Map<String, Object> source = idMap.get(id);
                 kvInt.setValue(((Number)source.getOrDefault(valueCName, 0)).longValue());
             }
-            intValues.getValues().add(kvInt);
+            intValues.addKVInt(kvInt);
         }
 
         return intValues;
diff --git a/oap-server/server-storage-plugin/storage-elasticsearch7-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/elasticsearch7/query/MetricsQueryEs7DAO.java b/oap-server/server-storage-plugin/storage-elasticsearch7-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/elasticsearch7/query/MetricsQueryEs7DAO.java
index 077898bc4..60c2b6bfa 100644
--- a/oap-server/server-storage-plugin/storage-elasticsearch7-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/elasticsearch7/query/MetricsQueryEs7DAO.java
+++ b/oap-server/server-storage-plugin/storage-elasticsearch7-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/elasticsearch7/query/MetricsQueryEs7DAO.java
@@ -91,7 +91,7 @@ public class MetricsQueryEs7DAO extends MetricsQueryEsDAO {
             KVInt kvInt = new KVInt();
             kvInt.setId(idBucket.getKeyAsString());
             kvInt.setValue(value);
-            intValues.getValues().add(kvInt);
+            intValues.addKVInt(kvInt);
         }
         return intValues;
     }
diff --git a/oap-server/server-storage-plugin/storage-jdbc-hikaricp-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/jdbc/h2/dao/H2MetricsQueryDAO.java b/oap-server/server-storage-plugin/storage-jdbc-hikaricp-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/jdbc/h2/dao/H2MetricsQueryDAO.java
index 0c208dc7c..5937252d0 100644
--- a/oap-server/server-storage-plugin/storage-jdbc-hikaricp-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/jdbc/h2/dao/H2MetricsQueryDAO.java
+++ b/oap-server/server-storage-plugin/storage-jdbc-hikaricp-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/jdbc/h2/dao/H2MetricsQueryDAO.java
@@ -91,7 +91,7 @@ public class H2MetricsQueryDAO extends H2SQLExecutor implements IMetricsQueryDAO
                     KVInt kv = new KVInt();
                     kv.setId(resultSet.getString("id"));
                     kv.setValue(resultSet.getLong("value"));
-                    intValues.getValues().add(kv);
+                    intValues.addKVInt(kv);
                 }
             }
         } catch (SQLException e) {
@@ -119,7 +119,7 @@ public class H2MetricsQueryDAO extends H2SQLExecutor implements IMetricsQueryDAO
                     KVInt kv = new KVInt();
                     kv.setId(resultSet.getString("id"));
                     kv.setValue(resultSet.getLong(valueCName));
-                    intValues.getValues().add(kv);
+                    intValues.addKVInt(kv);
                 }
             }
         } catch (SQLException e) {