ramitkataria opened a new pull request, #51127:
URL: https://github.com/apache/airflow/pull/51127
In `_get_test_name()` called by `set_env_id()`, the call stack is used to
determine the name of the current test. After #50571, `set_env_id()` was being
called from a `PythonOperator` (in addition to another call from the
`SystemTestContextBuilder`) which changed the call stack to not include the
name of the dag. As an example, here's all the files included in the call stack
when called from `SystemTestContextBuilder`:
```
[
'/opt/airflow/providers/amazon/tests/system/amazon/aws/utils/__init__.py',
'/opt/airflow/providers/amazon/tests/system/amazon/aws/utils/__init__.py',
'/opt/airflow/providers/amazon/tests/system/amazon/aws/example_mwaa.py',
'<frozen importlib._bootstrap>',
'<frozen importlib._bootstrap_external>',
'/opt/airflow/airflow-core/src/airflow/models/dagbag.py',
'/opt/airflow/airflow-core/src/airflow/models/dagbag.py',
'/opt/airflow/airflow-core/src/airflow/models/dagbag.py',
'/opt/airflow/airflow-core/src/airflow/models/dagbag.py',
'/opt/airflow/airflow-core/src/airflow/models/dagbag.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/task_runner.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/task_runner.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/task_runner.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/execute_workload.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/execute_workload.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/execute_workload.py',
'<frozen runpy>',
'<frozen runpy>'
]
```
and from the `PythonOperator`:
```
[
'/opt/airflow/providers/amazon/tests/system/amazon/aws/utils/__init__.py',
'/opt/airflow/providers/amazon/tests/system/amazon/aws/utils/__init__.py',
'/opt/airflow/providers/amazon/tests/system/amazon/aws/utils/__init__.py',
'/opt/airflow/providers/amazon/tests/system/amazon/aws/utils/__init__.py',
'/opt/airflow/providers/amazon/tests/system/amazon/aws/utils/__init__.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/callback_runner.py',
'/opt/airflow/providers/standard/src/airflow/providers/standard/operators/python.py',
'/opt/airflow/providers/standard/src/airflow/providers/standard/operators/python.py',
'/opt/airflow/task-sdk/src/airflow/sdk/bases/operator.py',
'/opt/airflow/task-sdk/src/airflow/sdk/bases/decorator.py',
'/opt/airflow/task-sdk/src/airflow/sdk/bases/operator.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/task_runner.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/task_runner.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/task_runner.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/supervisor.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/execute_workload.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/execute_workload.py',
'/opt/airflow/task-sdk/src/airflow/sdk/execution_time/execute_workload.py',
'<frozen runpy>',
'<frozen runpy>'
]
```
So the `StopIteration` error was being caused because it couldn't find the
name of the test (in this case `example_mwaa`) in the call stack. This PR fixes
this by using the test name already computed earlier in the
`SystemTestContextBuilder`, in the `PythonOperator` for `variable_fetcher`.
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