nathadfield edited a comment on issue #10790:
URL: https://github.com/apache/airflow/issues/10790#issuecomment-737899403
Not sure if this is relevant but, when the task was rescheduled five minutes
later, I saw this.
```
[2020-12-03 11:57:07,266] {scheduler_job.py:1237} ERROR - Executor reports
task instance <TaskInstance: target_dag.wait-task 2020-12-02 00:00:00+00:00
[queued]> finished (success) although the task says its queued. (Info: None)
Was the task killed externally?
Process ForkProcess-34:
Traceback (most recent call last):
File "/usr/local/lib/python3.7/multiprocessing/process.py", line 297, in
_bootstrap
self.run()
File "/usr/local/lib/python3.7/multiprocessing/process.py", line 99, in run
self._target(*self._args, **self._kwargs)
File
"/usr/local/lib/python3.7/site-packages/airflow/utils/dag_processing.py", line
365, in _run_processor_manager
processor_manager.start()
File
"/usr/local/lib/python3.7/site-packages/airflow/utils/dag_processing.py", line
596, in start
return self._run_parsing_loop()
File
"/usr/local/lib/python3.7/site-packages/airflow/utils/dag_processing.py", line
659, in _run_parsing_loop
self._processors.pop(processor.file_path)
KeyError: '/usr/local/airflow/dags/target_dag.py'
[2020-12-03 11:57:09,101] {dag_processing.py:399} WARNING -
DagFileProcessorManager (PID=157) exited with exit code 1 - re-launching
[2020-12-03 11:57:09,105] {dag_processing.py:250} INFO - Launched
DagFileProcessorManager with pid: 33432
```
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