amoghrajesh opened a new pull request, #68133:
URL: https://github.com/apache/airflow/pull/68133
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### What's being solved?
The task and asset store had a hardcoded 64 KB size limit that in core API
datamodels that could not be adjusted without code changes. Users with
legitimate large-payload use case had no way to raise it, and the limit wasn't
enforced consistently too, the core API validated it but the execution API
(worker path) did not.
### Current behaviour
- Core API rejected values over 64 KB with a hardcoded limit.
- Execution API (worker writes) had no size check at all.
- No config key existed to adjust the limit.
### Proposed change
Adds `[state_store] max_value_storage_bytes` (default `65535`) to control
the limit:
- **Core API** (task and asset store): rejects oversized values with HTTP
400. Set to `0` to disable the limit entirely. DB column limits then apply (~1
GB on PostgreSQL, 16 MB on MySQL).
- **Task SDK** (`task_store.set()` and `asset_store.set()`): logs a warning
in task logs when the serialized value exceeds the limit, but allows the write
through to not interrupt the execution mid run. The warning suggests
configuring a custom `[state_store] backend` for large payloads.
### Testing
Running example:
Task Store:
```python
@task
def my_task(**context: Context):
task_state = context["task_store"]
value = "x" * 700000
task_state.set("str_value", value)
```
<img width="2555" height="903" alt="image"
src="https://github.com/user-attachments/assets/737f21ca-55fb-4501-8dcd-772142270130";
/>
Asset store:
```python
with DAG(
dag_id="aip103_asset_producer",
start_date=pendulum.datetime(2026, 1, 1, tz="UTC"),
schedule=None,
catchup=False,
tags=["aip-103", "asset-state-test"],
):
@task(outlets=[aip103_test_asset])
def produce(**context):
print(f"Producer running for {aip103_test_asset.uri!r}")
w = "w" * 700000
context["asset_store"].set("my_asset_value_watermark", w)
produce()
```
<img width="2555" height="903" alt="image"
src="https://github.com/user-attachments/assets/a0c25408-b9f9-482f-926b-e6ba2503e0ad";
/>
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