While investigating a task failure in Mjolnir (2025-01-15), we found that the DAG references a generic refinery-hive-shaded.jar artifact.
If the artifact is refreshed (e.g., re-deployed by third parties) while a Spark job is running, executors will start to fail.
AC:
- Drop global refinery config variables.
- Version pin the refinery jar to a specific version to use in the DAG execution.