diff --git a/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/controller/ConfigController.java b/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/controller/ConfigController.java
index 145425b1632..d59e8e633bc 100755
--- a/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/controller/ConfigController.java
+++ b/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/controller/ConfigController.java
@@ -179,8 +179,8 @@ public ApolloConfig queryConfig(@PathVariable String appId, @PathVariable String
         Map<String, String> historyConfigurations = mergeReleaseConfigurations
             (historyReleasesWithOrder);
 
-        List<ConfigurationChange> configurationChanges = configService.calcConfigurationChanges
-            (latestConfigurations, historyConfigurations);
+        List<ConfigurationChange> configurationChanges = configService.calcConfigurationChanges(
+            latestConfigurations, historyConfigurations);
 
         apolloConfig.setConfigurationChanges(configurationChanges);
 
diff --git a/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/AbstractConfigService.java b/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/AbstractConfigService.java
index 8db6756aca5..9d239ac60bc 100644
--- a/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/AbstractConfigService.java
+++ b/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/AbstractConfigService.java
@@ -136,7 +136,7 @@ public List<ConfigurationChange> calcConfigurationChanges(
         continue;
       }
       changes.add(
-          new ConfigurationChange(commonKey, currentValue,"MODIFIED"));
+          new ConfigurationChange(commonKey, currentValue, "MODIFIED"));
     }
 
     return changes;
diff --git a/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/ConfigServiceWithChangeCache.java b/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/ConfigServiceWithChangeCache.java
index 961b08f3b59..aec6ec1d510 100644
--- a/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/ConfigServiceWithChangeCache.java
+++ b/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/ConfigServiceWithChangeCache.java
@@ -51,7 +51,7 @@
  */
 public class ConfigServiceWithChangeCache extends ConfigServiceWithCache {
 
-  private static final Logger logger = LoggerFactory.getLogger(ConfigServiceWithChangeCache.class);
+	private static final Logger logger = LoggerFactory.getLogger(ConfigServiceWithChangeCache.class);
 
 
 	private static final long DEFAULT_EXPIRED_AFTER_ACCESS_IN_SENCONDS = 10;
@@ -70,7 +70,7 @@ public ConfigServiceWithChangeCache(final ReleaseService releaseService,
 		  final BizConfig bizConfig,
 		  final MeterRegistry meterRegistry) {
 
-    super(releaseService, releaseMessageService, grayReleaseRulesHolder, bizConfig, meterRegistry);
+	  super(releaseService, releaseMessageService, grayReleaseRulesHolder, bizConfig, meterRegistry);
 
   }
 
@@ -82,10 +82,10 @@ public void initialize() {
 
 	private void buildReleaseCache() {
 
-	  CacheBuilder releasesCacheBuilder = CacheBuilder.newBuilder()
+		CacheBuilder releasesCacheBuilder = CacheBuilder.newBuilder()
 			  .expireAfterAccess(DEFAULT_EXPIRED_AFTER_ACCESS_IN_SENCONDS, TimeUnit.SECONDS);
 
-	  releasesCache = releasesCacheBuilder.build(new CacheLoader<String, Optional<Release>>() {
+		releasesCache = releasesCacheBuilder.build(new CacheLoader<String, Optional<Release>>() {
       @Override
       public Optional<Release> load(String key) {
 	      Transaction transaction = Tracer.newTransaction(TRACER_EVENT_CHANGE_CACHE_LOAD_KEY, key);
diff --git a/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/IncrementalSyncConfigService.java b/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/IncrementalSyncConfigService.java
index 834e4b5b6a6..2ca37c0d614 100644
--- a/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/IncrementalSyncConfigService.java
+++ b/apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/config/IncrementalSyncConfigService.java
@@ -32,7 +32,8 @@ public interface IncrementalSyncConfigService {
      * @param historyConfigurations
      * @return the ConfigurationChanges
      */
-    List<ConfigurationChange> calcConfigurationChanges(Map<String, String> latestReleaseConfigurations, Map<String, String> historyConfigurations);
+    List<ConfigurationChange> calcConfigurationChanges(
+        Map<String, String> latestReleaseConfigurations, Map<String, String> historyConfigurations);
 
     /**
      * @param releaseKeys