Airflow Xcom Exclusive -

Push only once, never overwrite a key. Use execution_date + task_id as part of the key. Enable exclusive mode to prevent accidental re-push.

XCom is exclusive to . Do not use it to pass large datasets between tasks; instead, write the large data to a file in cloud storage (S3/GCS) and pass the file path via XCom to the next task. airflow xcom exclusive

XComs are a mechanism for between tasks. Push only once, never overwrite a key

for building dynamic DAGs where downstream tasks depend on the output of upstream tasks. Push only once

If exclusive XCom access is critical for correctness, consider: