diff --git a/workspace-provider/src/main/java/com/aliware/tianchi/CallbackServiceImpl.java b/workspace-provider/src/main/java/com/aliware/tianchi/CallbackServiceImpl.java
index bf115303a4f9efba82807d021dd9e78e6ecb21f6..e5c15d58c34931972737ed43d726424587aff05e 100644
--- a/workspace-provider/src/main/java/com/aliware/tianchi/CallbackServiceImpl.java
+++ b/workspace-provider/src/main/java/com/aliware/tianchi/CallbackServiceImpl.java
@@ -45,8 +45,8 @@ public class CallbackServiceImpl implements CallbackService {
     private String generateStatusMessage() {
         try {
             List<String> cpuLoadList = getProcessCpuLoad().stream().map(Object::toString).collect(Collectors.toList());
-            //String cpuLoadString = String.join(",", cpuLoadList);
-            return "cpu=" + cpuLoadList[0] ;
+            String cpuLoadString = String.join(",", cpuLoadList);
+            return "cpu=" + cpuLoadString;
         }
         catch(Exception ex) {
             return "error";