added timeout for removing the dead loop state

server/model/monitor.js

@@ -359,8 +359,10 @@ class Monitor extends BeanModel {
                         });
                         bean.status = UP;
                     } catch (error) {
-                        bean.status = DOWN;
-                        bean.msg = error.message;
+                        if (error.message !== "Timeout") {
+                            bean.status = DOWN;
+                            bean.msg = error.message;
+                        }
                     }
                 } else {
                     bean.msg = "Unknown Monitor Type";

server/util-server.js

@@ -131,6 +131,7 @@ exports.mqttAsync = function (hostname, topic, okMessage, options = {}) {
 
         setTimeout(() => {
             client.end();
+            reject("Timeout");
         }, interval * 1000);
 
     });