amoghrajesh opened a new issue, #59032: URL: https://github.com/apache/airflow/issues/59032
### Body Context: https://github.com/apache/airflow/pull/58900#discussion_r2577456791 If we use the xcom patch API to perform an update on an XCom via the PATCH API, you wouldn't really get a usable value out in the task. Ways to repro this: 1. Define a dag like this: ```python from datetime import datetime from airflow.decorators import task from airflow.models.dag import DAG with DAG(dag_id="add_dag", schedule=None, start_date=datetime(2022, 3, 4)) as dag: @task def add_one(x: int): return x + 1 @task def add_two(y: int): # y is result of add_one return y + 1 @task def add_all_past_values(**context): xcoms = context['ti'].xcom_pull(task_ids=["add_one", "add_two"], include_prior_dates=True) print(xcoms) res1 = add_one(1) add_two(res1) add_all_past_values() ``` 2. Run the dag a couple times 3. Identify a past run and update its xcom entry: ```shell script curl -X 'PATCH' \ 'http://localhost:28080/api/v2/dags/add_dag/dagRuns/manual__2025-12-02T07%3A34%3A26%2B00%3A00/taskInstances/add_one/xcomEntries/return_value' \ -H 'accept: application/json' \ -H 'Content-Type: application/json' \ -d '{ "value": 7, "map_index": -1 }' ``` 4. Observe the output <img width="1125" height="305" alt="Image" src="https://github.com/user-attachments/assets/0334e3d3-ad22-4380-8642-5e70e2244dea"; /> Note the format of `7` from earlier patch, it is excessively serialised ### Committer - [x] I acknowledge that I am a maintainer/committer of the Apache Airflow project. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
