Stumbled across this stack trace when setting log level to DEBUG for the scheduler listener:
--- Logging error --- Traceback (most recent call last): File "/usr/lib/python3.5/logging/__init__.py", line 981, in emit msg = self.format(record) File "/usr/lib/python3.5/logging/__init__.py", line 831, in format return fmt.format(record) File "/usr/lib/python3.5/logging/__init__.py", line 568, in format record.message = record.getMessage() File "/usr/lib/python3.5/logging/__init__.py", line 331, in getMessage msg = msg % self.args TypeError: not enough arguments for format string Call stack: File "/home/antoine/.local/bin/swh-scheduler", line 11, in <module> sys.exit(cli()) File "/usr/lib/python3/dist-packages/click/core.py", line 716, in __call__ return self.main(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 696, in main rv = self.invoke(ctx) File "/usr/lib/python3/dist-packages/click/core.py", line 1060, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx)) File "/usr/lib/python3/dist-packages/click/core.py", line 889, in invoke return ctx.invoke(self.callback, **ctx.params) File "/usr/lib/python3/dist-packages/click/core.py", line 534, in invoke return callback(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/decorators.py", line 17, in new_func return f(get_current_context(), *args, **kwargs) File "/home/antoine/swh/swh-environment/swh-scheduler/swh/scheduler/cli.py", line 613, in listener event_monitor(app, backend=scheduler) File "/home/antoine/swh/swh-environment/swh-scheduler/swh/scheduler/celery_backend/listener.py", line 178, in event_monitor recv.capture(limit=None, timeout=None, wakeup=True) File "/usr/lib/python3/dist-packages/celery/events/receiver.py", line 92, in capture return list(self.consume(limit=limit, timeout=timeout, wakeup=wakeup)) File "/usr/lib/python3/dist-packages/kombu/mixins.py", line 192, in consume conn.drain_events(timeout=safety_interval) File "/usr/lib/python3/dist-packages/kombu/connection.py", line 301, in drain_events return self.transport.drain_events(self.connection, **kwargs) File "/usr/lib/python3/dist-packages/kombu/transport/pyamqp.py", line 103, in drain_events return connection.drain_events(**kwargs) File "/usr/lib/python3/dist-packages/amqp/connection.py", line 500, in drain_events while not self.blocking_read(timeout): File "/usr/lib/python3/dist-packages/amqp/connection.py", line 506, in blocking_read return self.on_inbound_frame(frame) File "/usr/lib/python3/dist-packages/amqp/method_framing.py", line 79, in on_frame callback(channel, msg.frame_method, msg.frame_args, msg) File "/usr/lib/python3/dist-packages/amqp/connection.py", line 510, in on_inbound_method method_sig, payload, content, File "/usr/lib/python3/dist-packages/amqp/abstract_channel.py", line 126, in dispatch_method listener(*args) File "/usr/lib/python3/dist-packages/amqp/channel.py", line 1616, in _on_basic_deliver fun(msg) File "/usr/lib/python3/dist-packages/kombu/messaging.py", line 624, in _receive_callback return on_m(message) if on_m else self.receive(decoded, message) File "/usr/lib/python3/dist-packages/kombu/messaging.py", line 590, in receive [callback(body, message) for callback in callbacks] File "/usr/lib/python3/dist-packages/kombu/messaging.py", line 590, in <listcomp> [callback(body, message) for callback in callbacks] File "/home/antoine/swh/swh-environment/swh-scheduler/swh/scheduler/celery_backend/listener.py", line 43, in _receive self.process(type, body, message) File "/home/antoine/swh/swh-environment/swh-scheduler/swh/scheduler/celery_backend/listener.py", line 49, in process handler and handler(event, message) File "/home/antoine/swh/swh-environment/swh-scheduler/swh/scheduler/celery_backend/listener.py", line 111, in task_started event.get('name', 'N/A')) Message: 'task_started: %s %s %s' Arguments: ('task-started', 'N/A')