potiuk opened a new issue, #58907:
URL: https://github.com/apache/airflow/issues/58907
The TestEmrCreateJobFlowOperator is flaky. Sometimes it fails with:
```
=================================================================================================
ERRORS
=================================================================================================
____________________________________________________________ ERROR at
teardown of TestEmrCreateJobFlowOperator.test_render_template_from_file
____________________________________________________________
devel-common/src/tests_common/pytest_plugin.py:1965: in
clean_dags_dagruns_and_dagbundles
clear_db_dags()
devel-common/src/tests_common/test_utils/db.py:267: in clear_db_dags
).delete() # todo: this should not be necessary because the fk to
DagVersion should be ON DELETE SET NULL
^^^^^^^^
/usr/python/lib/python3.12/site-packages/sqlalchemy/orm/query.py:3222: in
delete
result = self.session.execute(
/usr/python/lib/python3.12/site-packages/sqlalchemy/orm/session.py:1720: in
execute
result = compile_state_cls.orm_setup_cursor_result(
/usr/python/lib/python3.12/site-packages/sqlalchemy/orm/persistence.py:1889:
in orm_setup_cursor_result
cls._do_post_synchronize_evaluate(session, result, update_options)
/usr/python/lib/python3.12/site-packages/sqlalchemy/orm/persistence.py:2483:
in _do_post_synchronize_evaluate
attributes.instance_state(obj)
E AttributeError: 'NoneType' object has no attribute '_sa_instance_state'
------------------------------------------------------------------------------------------
Captured stdout call
------------------------------------------------------------------------------------------
2025-12-01T13:55:12.129141Z [info ] Creating ORM DAG for test_dag_id
[airflow.dag_processing.collection]
2025-12-01T13:55:12.158303Z [info ] Creating job flow using aws_conn_id:
aws_default, emr_conn_id: emr_default
[airflow.task.operators.airflow.providers.amazon.aws.operators.emr.EmrCreateJobFlowOperator]
2025-12-01T13:55:12.164657Z [info ] Job flow with id j-8989898989
created
[airflow.task.operators.airflow.providers.amazon.aws.operators.emr.EmrCreateJobFlowOperator]
------------------------------------------------------------------------------------------
Captured stderr call
------------------------------------------------------------------------------------------
2025-12-01T13:55:12.122810Z [info ] Sync 1 DAGs
[airflow.serialization.serialized_objects]
-------------------------------------------------------------------------------------------
Captured log call
--------------------------------------------------------------------------------------------
INFO airflow.serialization.serialized_objects:serialized_objects.py:2952
Sync 1 DAGs
------------------------------------------------------------------ generated
xml file: /files/test_result-providers_amazon-postgres.xml
------------------------------------------------------------------
```
For example here:
https://github.com/apache/airflow/actions/runs/19824640938/job/56795807970#step:8:2342
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