kaxil opened a new pull request, #55809:
URL: https://github.com/apache/airflow/pull/55809
Resolves circular import that occurs when KubernetesExecutor is dynamically
loaded during Airflow startup. The issue manifests as 'cannot import name from
partially initialized module' errors during scheduler/triggerer initialization.
Root cause: The import chain executor → version_compat → BaseOperator →
taskinstance → sentry → executor creates a circular dependency when sentry is
enabled, as sentry initialization attempts to load the executor while it's
already being imported.
Changes:
- Remove BaseOperator and BaseSensorOperator from version_compat.py
module-level imports
- Add conditional imports directly in operator/sensor files that need these
classes
- Maintain compatibility across Airflow 2.x and 3.x versions
This prevents the circular import by breaking the chain at version_compat,
ensuring sentry initialization doesn't trigger recursive executor loading.
Files affected:
- version_compat.py: Removed BaseOperator/BaseSensorOperator imports
- operators/job.py: Added conditional BaseOperator import
- operators/kueue.py: Added conditional BaseOperator import
- operators/pod.py: Added conditional BaseOperator import
- operators/resource.py: Added conditional BaseOperator import
- sensors/spark_kubernetes.py: Added conditional BaseSensorOperator import
Fixes #55803
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