增加0判断

@@ -92,10 +92,8 @@ public class QueueViewJob implements Callable {
             DEBUG.error("Failed to parse queue_view info: {} , error {}", respJson, e);
 
             return;
-        }
-        catch (Exception e)
-        {
-            DEBUG.error("Failed to execute monitor task , error {} ",e);
+        } catch (Exception e) {
+            DEBUG.error("Failed to execute monitor task , error {} ", e);
 
             return;
         }
@@ -122,7 +120,7 @@ public class QueueViewJob implements Callable {
 
                     queueInfo.setAlert_high(alert);
 
-                    if (queueInfo.getMessages() > alert) {
+                    if (0 < alert && queueInfo.getMessages() > alert) {
                         //alert
                         String msg = buildAlarmMsg(queueInfo);