minnieshi edited a comment on issue #13542:
URL: https://github.com/apache/airflow/issues/13542#issuecomment-821258217
**My situation**
- kubenetes
- celery executor
- only 1 dag is 'on', the rest 20 dags are 'off'
- dag is correct as it works in other environment.
- pool (default_pool), 32 slots, 0 used slots, queued slots =1)
- tasks in the dag can be run manually (by clear it), but it does not
automatically run the next task.
- one situation: after restarting the scheduler manually (to restart
configuration is set to never, value -1), it decided to run 3 out of 4 tasks,
and the last one just **stuck at the queued state**
- after that, tried to load the dag with different name and different id,
the 1st task of the dag
**stuck at the 'scheduled' state** after clear the task.
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