[update] 解决前端报错问题

signal-control-service/src/main/java/net/wanji/web/controller/SituationDetectionController.java

@@ -240,8 +240,13 @@ public class SituationDetectionController extends BaseController {
     public JsonViewObject signalService() throws Exception {
         JsonViewObject jsonViewObject = JsonViewObject.newInstance();
         List<SystemServiceStatusDTO> sysList = SystemServiceStatusTask.sysList;
-        List<SystemServiceStatusDTO> sort = sysList.stream().
+        List<SystemServiceStatusDTO> sort = null;
+        try {
+            sort = sysList.stream().
                     sorted(Comparator.comparing(SystemServiceStatusDTO::getStartDate)).collect(Collectors.toList());
+        } catch (Exception e) {
+            sort = sysList;
+        }
         return jsonViewObject.success(sort);
     }