ephraimbuddy commented on issue #25200:
URL: https://github.com/apache/airflow/issues/25200#issuecomment-1195248602
The error at the scheduler log:
```
2022-07-26 09:26:49,032] {dag.py:3084} INFO - Setting next_dagrun for
break_mapping to 2022-05-21T00:00:00+00:00, run_after=2022-05-22T00:00:00+00:00
[2022-07-26 09:26:49,090] {mappedoperator.py:665} INFO - Marking
<TaskInstance: break_mapping.add_one scheduled__2022-05-07T00:00:00+00:00
[None]> as SKIPPED since the map has 0 values to expand
[2022-07-26 09:26:49,113] {dagrun.py:588} ERROR - Deadlock; marking run
<DagRun break_mapping @ 2022-05-07 00:00:00+00:00:
scheduled__2022-05-07T00:00:00+00:00, state:running, queued_at: 2022-07-26
09:26:46.876995+00:00. externally triggered: False> failed
```
The task log for the successful task with failed dagrun(last lines), the two
other tasks were skipped as expected:
```
[2022-07-26, 09:26:48 UTC] {logging_mixin.py:115} INFO - Hi
[2022-07-26, 09:26:48 UTC] {python.py:173} INFO - Done. Returned value was:
None
[2022-07-26, 09:26:48 UTC] {taskinstance.py:1393} INFO - Marking task as
SUCCESS. dag_id=break_mapping, task_id=say_hi, execution_date=20220507T000000,
start_date=20220726T092647, end_date=20220726T092648
[2022-07-26, 09:26:49 UTC] {local_task_job.py:163} INFO - Task exited with
return code 0
[2022-07-26, 09:26:49 UTC] {local_task_job.py:272} INFO - 0 downstream tasks
scheduled from follow-on schedule check
```
The task log for the successful task with successful dagrun(last lines), the
two other tasks were skipped as expected:
```
[2022-07-26, 09:26:43 UTC] {logging_mixin.py:115} INFO - Hi
[2022-07-26, 09:26:43 UTC] {python.py:173} INFO - Done. Returned value was:
None
[2022-07-26, 09:26:43 UTC] {taskinstance.py:1393} INFO - Marking task as
SUCCESS. dag_id=break_mapping, task_id=say_hi, execution_date=20220503T000000,
start_date=20220726T092641, end_date=20220726T092643
[2022-07-26, 09:26:43 UTC] {local_task_job.py:163} INFO - Task exited with
return code 0
[2022-07-26, 09:26:43 UTC] {mappedoperator.py:665} INFO - Marking
<TaskInstance: break_mapping.add_one scheduled__2022-05-03T00:00:00+00:00
[None]> as SKIPPED since the map has 0 values to expand
[2022-07-26, 09:26:43 UTC] {local_task_job.py:272} INFO - 0 downstream tasks
scheduled from follow-on schedule check
```
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