diff --git a/apm-collector/apm-collector-core/src/main/java/org/skywalking/apm/collector/core/storage/StorageInstaller.java b/apm-collector/apm-collector-core/src/main/java/org/skywalking/apm/collector/core/storage/StorageInstaller.java
index 01abbf72c886d126ee8c94e4ccefaabef5c81dff..4d167daf163e4d68df59dc4ee75971e8f975ecad 100644
--- a/apm-collector/apm-collector-core/src/main/java/org/skywalking/apm/collector/core/storage/StorageInstaller.java
+++ b/apm-collector/apm-collector-core/src/main/java/org/skywalking/apm/collector/core/storage/StorageInstaller.java
@@ -18,13 +18,14 @@ public abstract class StorageInstaller {
         try {
             List<TableDefine> tableDefines = defineLoader.load();
             defineFilter(tableDefines);
+            Boolean debug = System.getProperty("debug") != null;
 
             for (TableDefine tableDefine : tableDefines) {
                 tableDefine.initialize();
                 if (!isExists(client, tableDefine)) {
                     logger.info("table: {} not exists", tableDefine.getName());
                     createTable(client, tableDefine);
-                } else {
+                } else if (debug) {
                     logger.info("table: {} exists", tableDefine.getName());
                     deleteTable(client, tableDefine);
                     createTable(client, tableDefine);
diff --git a/apm-collector/apm-collector-ui/src/main/java/org/skywalking/apm/collector/ui/dao/ServiceReferenceEsDAO.java b/apm-collector/apm-collector-ui/src/main/java/org/skywalking/apm/collector/ui/dao/ServiceReferenceEsDAO.java
index 9a397c80d8475b3e20a1c84dec729b10eac0fc6c..b6947051c91f8de1b1ae020917bf331bb5e597aa 100644
--- a/apm-collector/apm-collector-ui/src/main/java/org/skywalking/apm/collector/ui/dao/ServiceReferenceEsDAO.java
+++ b/apm-collector/apm-collector-ui/src/main/java/org/skywalking/apm/collector/ui/dao/ServiceReferenceEsDAO.java
@@ -110,13 +110,15 @@ public class ServiceReferenceEsDAO extends EsDAO implements IServiceReferenceDAO
                 .subAggregation(AggregationBuilders.sum(ServiceReferenceTable.COLUMN_SUMMARY).field(ServiceReferenceTable.COLUMN_SUMMARY))
                 .subAggregation(AggregationBuilders.sum(ServiceReferenceTable.COLUMN_COST_SUMMARY).field(ServiceReferenceTable.COLUMN_COST_SUMMARY))));
 
+        Map<String, JsonObject> serviceReferenceMap = new LinkedHashMap<>();
+
         JsonArray serviceReferenceArray = new JsonArray();
         SearchResponse searchResponse = searchRequestBuilder.get();
         Terms frontServiceIdTerms = searchResponse.getAggregations().get(ServiceReferenceTable.COLUMN_FRONT_SERVICE_ID);
         for (Terms.Bucket frontServiceBucket : frontServiceIdTerms.getBuckets()) {
             int frontServiceId = frontServiceBucket.getKeyAsNumber().intValue();
             if (frontServiceId != 0) {
-                parseSubAggregate(serviceReferenceArray, frontServiceBucket, frontServiceId);
+                parseSubAggregate(serviceReferenceMap, serviceReferenceArray, frontServiceBucket, frontServiceId);
             }
         }
 
@@ -126,16 +128,17 @@ public class ServiceReferenceEsDAO extends EsDAO implements IServiceReferenceDAO
             if (StringUtils.isNotEmpty(frontServiceName)) {
                 String[] serviceNames = frontServiceName.split(Const.ID_SPLIT);
                 int frontServiceId = ServiceIdCache.getForUI(Integer.parseInt(serviceNames[0]), serviceNames[1]);
-                parseSubAggregate(serviceReferenceArray, frontServiceBucket, frontServiceId);
+                parseSubAggregate(serviceReferenceMap, serviceReferenceArray, frontServiceBucket, frontServiceId);
             }
         }
+
+        serviceReferenceMap.values().forEach(serviceReferenceArray::add);
         return serviceReferenceArray;
     }
 
-    private void parseSubAggregate(JsonArray serviceReferenceArray, Terms.Bucket frontServiceBucket,
+    private void parseSubAggregate(Map<String, JsonObject> serviceReferenceMap, JsonArray serviceReferenceArray,
+        Terms.Bucket frontServiceBucket,
         int frontServiceId) {
-        Map<String, JsonObject> serviceReferenceMap = new LinkedHashMap<>();
-
         Terms behindServiceIdTerms = frontServiceBucket.getAggregations().get(ServiceReferenceTable.COLUMN_BEHIND_SERVICE_ID);
         for (Terms.Bucket behindServiceIdBucket : behindServiceIdTerms.getBuckets()) {
             int behindServiceId = behindServiceIdBucket.getKeyAsNumber().intValue();
@@ -205,8 +208,6 @@ public class ServiceReferenceEsDAO extends EsDAO implements IServiceReferenceDAO
                 merge(serviceReferenceMap, serviceReference);
             }
         }
-
-        serviceReferenceMap.values().forEach(serviceReferenceArray::add);
     }
 
     private void merge(Map<String, JsonObject> serviceReferenceMap, JsonObject serviceReference) {
diff --git a/apm-collector/apm-collector-ui/src/main/java/org/skywalking/apm/collector/ui/jetty/handler/time/AllInstanceLastTimeGetHandler.java b/apm-collector/apm-collector-ui/src/main/java/org/skywalking/apm/collector/ui/jetty/handler/time/AllInstanceLastTimeGetHandler.java
index 3a2f47806debf66b1a09fe8b333d530c54d8ff7c..1b5c7f59557629656b6e1c9d325a64c19ef0e387 100644
--- a/apm-collector/apm-collector-ui/src/main/java/org/skywalking/apm/collector/ui/jetty/handler/time/AllInstanceLastTimeGetHandler.java
+++ b/apm-collector/apm-collector-ui/src/main/java/org/skywalking/apm/collector/ui/jetty/handler/time/AllInstanceLastTimeGetHandler.java
@@ -28,18 +28,16 @@ public class AllInstanceLastTimeGetHandler extends JettyHandler {
         Long timeBucket = service.allInstanceLastTime();
         logger.debug("all instance last time: {}", timeBucket);
 
-        long instanceTimeBucket;
         if (timeBucket == 0) {
-            instanceTimeBucket = 0;
-        } else {
-            Calendar calendar = Calendar.getInstance();
-            calendar.setTimeInMillis(TimeBucketUtils.INSTANCE.changeTimeBucket2TimeStamp(TimeBucketUtils.TimeBucketType.SECOND.name(), timeBucket));
-            calendar.add(Calendar.SECOND, -5);
-            instanceTimeBucket = calendar.getTimeInMillis();
+            timeBucket = TimeBucketUtils.INSTANCE.getSecondTimeBucket(System.currentTimeMillis());
         }
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTimeInMillis(TimeBucketUtils.INSTANCE.changeTimeBucket2TimeStamp(TimeBucketUtils.TimeBucketType.SECOND.name(), timeBucket));
+        calendar.add(Calendar.SECOND, -5);
+        timeBucket = calendar.getTimeInMillis();
 
         JsonObject timeJson = new JsonObject();
-        timeJson.addProperty("timeBucket", TimeBucketUtils.INSTANCE.getSecondTimeBucket(instanceTimeBucket));
+        timeJson.addProperty("timeBucket", TimeBucketUtils.INSTANCE.getSecondTimeBucket(timeBucket));
         return timeJson;
     }