If no task if found don't print error (#130)

api/runner/async_runner.go

@@ -34,7 +34,7 @@ func getTask(url string) (*models.Task, error) {
 	}
 
 	if task.ID == "" {
-		return nil, errors.New("Invalid Task: ID empty")
+		return nil, nil
 	}
 	return &task, nil
 }
@@ -124,6 +124,10 @@ func startAsyncRunners(ctx context.Context, wg *sync.WaitGroup, i int, url strin
 				time.Sleep(1 * time.Second)
 				continue
 			}
+			if task == nil {
+				time.Sleep(1 * time.Second)
+				continue
+			}
 			log.Info("Picked up task:", task.ID)
 
 			log.Info("Running task:", task.ID)