diff --git a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/EssCallbackController.java b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/EssCallbackController.java
index 751e1448..5fe45958 100644
--- a/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/EssCallbackController.java
+++ b/ess/ess-server/src/main/java/cn/axzo/nanopart/ess/server/ess/EssCallbackController.java
@@ -126,7 +126,8 @@ class EssCallbackController implements EssCallbackApi, InitializingBean {
         String callbackTypeStr = callbackType == null ? "" : "[" + callbackType + "]";
         essLog.setContext(String.format("callback:%s%s", request.getMsgType(), callbackTypeStr));
         essLog.setSubject("");
-        if (subject != null) essLog.setSubject(String.valueOf(subject));
+        if (subject != null)
+            essLog.setSubject(String.valueOf(subject));
         essLog.addLogContent("request", request);
         essLogDao.save(essLog);
     }