diff --git a/core/src/main/java/cn/edu/tsinghua/iot/benchmark/schema/MetaUtil.java b/core/src/main/java/cn/edu/tsinghua/iot/benchmark/schema/MetaUtil.java
index a4680abf6..495c7dc53 100644
--- a/core/src/main/java/cn/edu/tsinghua/iot/benchmark/schema/MetaUtil.java
+++ b/core/src/main/java/cn/edu/tsinghua/iot/benchmark/schema/MetaUtil.java
@@ -126,7 +126,7 @@ public static void distributeDevices(
         deviceSchemasList.add(deviceSchema);
         nameDataSchema.putIfAbsent(deviceSchema.getDevice(), deviceSchema);
         groups.add(deviceSchema.getGroup());
-        if(collectTables){
+        if (collectTables) {
           MetaDataSchema.TABLES.add(deviceSchema.getTable());
         }
         deviceIndex++;
diff --git a/core/src/main/java/cn/edu/tsinghua/iot/benchmark/schema/schemaImpl/GenerateMetaDataSchema.java b/core/src/main/java/cn/edu/tsinghua/iot/benchmark/schema/schemaImpl/GenerateMetaDataSchema.java
index f9fed8b9f..c5b7091ec 100644
--- a/core/src/main/java/cn/edu/tsinghua/iot/benchmark/schema/schemaImpl/GenerateMetaDataSchema.java
+++ b/core/src/main/java/cn/edu/tsinghua/iot/benchmark/schema/schemaImpl/GenerateMetaDataSchema.java
@@ -48,7 +48,12 @@ public boolean createMetaDataSchema() {
         true);
     // dataClient
     MetaUtil.distributeDevices(
-        config.getDATA_CLIENT_NUMBER(), DATA_CLIENT_DATA_SCHEMA, sensors, NAME_DATA_SCHEMA, GROUPS, false);
+        config.getDATA_CLIENT_NUMBER(),
+        DATA_CLIENT_DATA_SCHEMA,
+        sensors,
+        NAME_DATA_SCHEMA,
+        GROUPS,
+        false);
     return true;
   }
 }