astentx1 opened a new issue, #27954:
URL: https://github.com/apache/airflow/issues/27954
### Apache Airflow version
Other Airflow 2 version (please specify below)
### What happened
AirFlow version 2.3.3.
When we use TaskFlow API for the DAG and have some task with
`trigger_rule="none_failed"` this task fails when its predecessor is skipped.
The error occurs during XCom read:
```
File "/usr/local/lib/python3.8/site-packages/airflow/models/xcom_arg.py",
line 152, in resolve
raise AirflowException(
airflow.exceptions.AirflowException: XComArg result from exec at skip_test
with key="return_value" is not found!
```
### What you think should happen instead
It should execute its code with empty input. This behaviour existed in
version 2.2.3. Also it's well aligned with behaviour of general tasks connected
by arrows: downstream task executes successfully with empty input.
### How to reproduce
1. Create a DAG.
2. Add `@task`-decorated task that raises `AirflowSkipException`
3. Add another `@task`-decorated task that checks if its input is empty.
4. Pass an output of the first task to the second task.
5. Add DummyOperator task as a downstream of the first task.
`trigger_rule="none_failed"`
6. Execute a DAG.
7. The second task fails.
```py
from airflow.decorators import dag, task
from airflow.utils.dates import days_ago
from airflow.exceptions import AirflowSkipException
from airflow.operators.dummy import DummyOperator
@dag(start_date=days_ago(1))
def skip_test():
@task
def exec():
raise AirflowSkipException("skipping")
# This will fail
@task(trigger_rule="none_failed")
def finish(prev_res):
print(prev_res is None)
# While this will not
finish_2 = DummyOperator(
task_id = "finish_2",
trigger_rule="none_failed"
)
exec_res = exec()
finish(exec_res)
exec_res >> finish_2
return
G_DUMMY = skip_test()
```
### Operating System
Debian GNU/Linux 10 (buster)
### Versions of Apache Airflow Providers
_No response_
### Deployment
Docker-Compose
### Deployment details
_No response_
### Anything else
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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