Matthew Revell created AIRFLOW-2099:
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Summary: Task details cannot be shown when PythonOperator calls
partial function / class instance with __call__
Key: AIRFLOW-2099
URL: https://issues.apache.org/jira/browse/AIRFLOW-2099
Project: Apache Airflow
Issue Type: Bug
Components: ui
Affects Versions: Airflow 1.8
Reporter: Matthew Revell
Assignee: Matthew Revell
There are several scenarios where the inspect.getsource() method fails with:
{{object at 0x00000000> is not a module, class, method, function, traceback,
frame, or code object}}
One such scenario is described in
[AIRFLOW-1027|https://issues.apache.org/jira/browse/AIRFLOW-1027] where a
partial function is used. Another is when an instance of a class which
implements __call__() is used.
Example:
{{class MyClass(object):}}
{{ def __init__(self):}}
{{ pass}}
{{ def __call__(self):}}
{{ pass}}
{{my_class = MyClass()}}
{{dag_task = PythonOperator(}}
{{ task_id='dag_task',}}
{{ dag=dag, }}
{{ python_callable=my_class,}}
{{)}}
There exists a PR for AIRFLOW-1027, however, this fix does not address this
other scenario, and also does not guard against any other edge cases which my
result in this error in future.
A better solution would be to catch known scenarios with work arounds, and
default to reporting that the source is unavailable for unknown cases. This
would at least display the Task Instance details in every case.
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