potiuk opened a new pull request, #33145:
URL: https://github.com/apache/airflow/pull/33145
Recently sqlite started to fail randomly during teardown of
`test_xcom_map_nest` or `test_xcom_map_zip_nest`. This happpened after adding
`test_xcom_map_zip_nest` . It looked very strange:
```
sqlite3.ProgrammingError: SQLite objects created in a thread can only be
used in that same thread
```
By analysing possible reasons it seems that it was a side effect of the
existing `test_xcom_map_nest` that allocated a new session in the run method of
task instance rather than pass the sesion that is created and torrn down in the
pytest fixture.
The hypothesis is that the session created in the ``test_xcom_map_nest``
were being reclaimed and closed while the `test_xcom_map_zip_nest` test was
already starting in a different thread started by Pytest.
The fix is to pass the session object to run method of the taskinstance in
the ``test_xcom_map_nest`` test.
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