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Airflow Datafusion Hook: Regression in the work of start_pipeline method for DataFusionHook #60661
Description
Apache Airflow Provider(s)
Versions of Apache Airflow Providers
apache-airflow-providers-google==19.3.0
Apache Airflow version
2.11.0; 3.x.x
Operating System
Ubuntu
Deployment
Other
Deployment details
No response
What happened
After merging this PR #58698 in the main branch the start_pipeline method started to fail with this error:
[2026-01-15, 00:01:17 UTC] {taskinstance.py:3336} ERROR - Task failed with exception
Traceback (most recent call last):
File "/usr/python/lib/python3.11/site-packages/airflow/models/taskinstance.py", line 776, in _execute_task
result = _execute_callable(context=context, **execute_callable_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/site-packages/airflow/models/taskinstance.py", line 742, in _execute_callable
return ExecutionCallableRunner(
^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/site-packages/airflow/utils/operator_helpers.py", line 252, in run
return self.func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/site-packages/airflow/models/baseoperator.py", line 424, in wrapper
return func(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/site-packages/airflow/providers/google/cloud/operators/datafusion.py", line 800, in execute
self.pipeline_id = hook.start_pipeline(
^^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/site-packages/airflow/providers/google/cloud/hooks/datafusion.py", line 488, in start_pipeline
response_json = json.loads(response.data)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/json/__init__.py", line 346, in loads
return _default_decoder.decode(s)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/json/decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/python/lib/python3.11/json/decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
What you think should happen instead
This PR #58698 brought the breaking changes to the start_pipeline method for DataFusionHook. This PR was for handling errors, but it broke the start_pipeline method and a bunch of DataFusion operators. In my opinion we need to revert this PR for returning to the previous behavior and think about another solution for handling errors.
How to reproduce
Run this DAG https://github.com/apache/airflow/blob/main/providers/google/tests/system/google/cloud/datafusion/example_datafusion.py in Breeze environment or any other Airflow environment. The start_pipeline_def task should fail with json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0) error.
Anything else
No response
Are you willing to submit PR?
- Yes I am willing to submit a PR!
Code of Conduct
- I agree to follow this project's Code of Conduct
Activity
chirodip98 commentedon Jan 16, 2026
I would like to work and fix this Issue!