diff --git a/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/core/route/strategy/ExecutorRouteFailover.java b/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/core/route/strategy/ExecutorRouteFailover.java
index a2e4c909..fea76aa1 100644
--- a/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/core/route/strategy/ExecutorRouteFailover.java
+++ b/jero-boot/jero-cloud-module/jero-cloud-xxljob/src/main/java/com/xxl/job/admin/core/route/strategy/ExecutorRouteFailover.java
@@ -17,7 +17,7 @@ public class ExecutorRouteFailover extends ExecutorRouter {
     @Override
     public ReturnT<String> route(TriggerParam triggerParam, List<String> addressList) {
 
-        StringBuffer beatResultSB = new StringBuffer();
+        StringBuilder beatResultSB = new StringBuilder();
         for (String address : addressList) {
             // beat
             ReturnT<String> beatResult = null;
@@ -26,7 +26,7 @@ public class ExecutorRouteFailover extends ExecutorRouter {
                 beatResult = executorBiz.beat();
             } catch (Exception e) {
                 logger.error(e.getMessage(), e);
-                beatResult = new ReturnT<String>(ReturnT.FAIL_CODE, ""+e );
+                beatResult = new ReturnT<>(ReturnT.FAIL_CODE, ""+e );
             }
             beatResultSB.append( (beatResultSB.length()>0)?"<br><br>":"")
                     .append(I18nUtil.getString("jobconf_beat") + "：")
@@ -42,7 +42,7 @@ public class ExecutorRouteFailover extends ExecutorRouter {
                 return beatResult;
             }
         }
-        return new ReturnT<String>(ReturnT.FAIL_CODE, beatResultSB.toString());
+        return new ReturnT<>(ReturnT.FAIL_CODE, beatResultSB.toString());
 
     }
 }