ashb commented on pull request #11306:
URL: https://github.com/apache/airflow/pull/11306#issuecomment-704313464
With extra logging in scheduler HA this was what we saw:
```
[2020-10-05 22:39:36,362] {{scheduler_job.py:298}} WARNING - TEST: EOFError
received on <DagFileProcessorProcess
file_path='/opt/airflow/tests/dags_with_system_exit/a_system_exit.py'>
Traceback (most recent call last):
File "/opt/airflow/airflow/jobs/scheduler_job.py", line 291, in done
self._result = self._parent_channel.recv()
File "/usr/local/lib/python3.8/multiprocessing/connection.py", line 250,
in recv
buf = self._recv_bytes()
File "/usr/local/lib/python3.8/multiprocessing/connection.py", line 414,
in _recv_bytes
buf = self._recv(4)
File "/usr/local/lib/python3.8/multiprocessing/connection.py", line 383,
in _recv
raise EOFError
EOFError
[2020-10-05 22:39:36,364] {{scheduler_job.py:307}} WARNING - TEST: process
9709 still alive <DagFileProcessorProcess
file_path='/opt/airflow/tests/dags_with_system_exit/a_system_exit.py'>
```
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