Take a look at https://github.com/celery/celery/blob/v3.0.23/celery/utils/log.py#L250 https://github.com/celery/celery/blob/v3.0.23/celery/utils/l... - it's an

Take a look at https://github.com/celery/celery/blob/v3.0.23/celery/utils/log.py#L250 https://github.com/celery/celery/blob/v3.0.23/celery/utils/l... - it's an older version that I once checked but it seems to be patching loggers unconditionally (i.e. outside any signal handler).