catch more scenarios

jass/tasks.py

@@ -93,7 +93,11 @@ def get_queue_status():
             for worker, queue in getattr(inspect, k)().items():
                 ret[k] += len(queue)
                 workers.add(worker)
-        except ValueError:
+        except (
+                AttributeError,  # when no worker
+                ConnectionResetError,  # when rabbitMQ went down
+                TimeoutError,  # when rabbitMQ is not reachable
+        ):
             pass
     ret['worker'] = len(workers)
     return ret