diederikwp commented on issue #4339: [AIRFLOW-3303] Deprecate old UI in favor of FAB URL: https://github.com/apache/airflow/pull/4339#issuecomment-455897948 I have a problem where the webserver keeps repeating "some workers are starting up, waiting...", and I think it might be because of these changes. It seems that the worker processes no longer get the proper prefix after initialization, because the file gunicorn_config.py was deleted and it is no longer part of run_args in def webserver in cli.py. Before deletion, it contained the post_worker_init function: https://github.com/apache/airflow/blob/cb8b2a1dc64c3ea6ba445893c65c6c953dfb476a/airflow/www/gunicorn_config.py#L25-L28 At this point, get_num_ready_workers still expects the prefix: https://github.com/apache/airflow/blob/c030729dcbe35a2a4869e46b57a761c8376ede8d/airflow/bin/cli.py#L691-L704 @verdan Could you please confirm/refute
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