aa-matthias opened a new issue, #50530:
URL: https://github.com/apache/airflow/issues/50530
### Apache Airflow version
3.0.0
### If "Other Airflow 2 version" selected, which one?
_No response_
### What happened?
When running DAG processor these errors are shown in stderr - DAGs are not
parsed successfully.
Note: Same DAG seems to parse successful when running `airflow dags
reserialize`
```log
--- Supervised process Last chance exception handler ---
Traceback (most recent call last):
File
"./virtualenvs/airflow/lib/python3.12/site-packages/airflow/sdk/execution_time/supervisor.py",
line 368, in _fork_main
target()
File
"./virtualenvs/airflow/lib/python3.12/site-packages/airflow/dag_processing/processor.py",
line 82, in _parse_file_entrypoint
msg = comms_decoder.get_message()
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"./virtualenvs/airflow/lib/python3.12/site-packages/airflow/sdk/execution_time/task_runner.py",
line 632, in get_message
msg = self.decoder.validate_json(line)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"./virtualenvs/airflow/lib/python3.12/site-packages/pydantic/type_adapter.py",
line 468, in validate_json
return self.validator.validate_json(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"./virtualenvs/airflow/lib/python3.12/site-packages/pydantic/_internal/_mock_val_ser.py",
line 100, in __getattr__
raise PydanticUserError(self._error_message, code=self._code)
pydantic.errors.PydanticUserError:
`TypeAdapter[typing.Annotated[typing.Union[ForwardRef('DagFileParseRequest'),
airflow.sdk.execution_time.comms.ConnectionResult,
airflow.sdk.execution_time.comms.VariableResult,
airflow.sdk.execution_time.comms.ErrorResponse,
airflow.sdk.execution_time.comms.OKResponse], FieldInfo(annotation=NoneType,
required=True, discriminator='type')]]` is not fully defined; you should define
`typing.Annotated[typing.Union[ForwardRef('DagFileParseRequest'),
airflow.sdk.execution_time.comms.ConnectionResult,
airflow.sdk.execution_time.comms.VariableResult,
airflow.sdk.execution_time.comms.ErrorResponse,
airflow.sdk.execution_time.comms.OKResponse], FieldInfo(annotation=NoneType,
required=True, discriminator='type')]` and all referenced types, then call
`.rebuild()` on the instance.
For further information visit
https://errors.pydantic.dev/2.11/u/class-not-fully-defined
```
### What you think should happen instead?
_No response_
### How to reproduce
upgraded from 2.10.5 - migrated db and config, adapted dags, added new
supervisor program for dag-processor
### Operating System
Ubuntu 24.04.2 LTS
### Versions of Apache Airflow Providers
_No response_
### Deployment
Virtualenv installation
### Deployment details
_No response_
### Anything else?
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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