olk opened a new issue, #46297:
URL: https://github.com/apache/airflow/issues/46297
### Apache Airflow version
2.10.4
### If "Other Airflow 2 version" selected, which one?
_No response_
### What happened?
The joning task after branching is always skipped with trigger
policy="none_failed_min_one_success":
```
from airflow.utils.dates import days_ago
from airflow.decorators import dag, task, task_group
@task
def start():
return [ 1, 2, 3 ]
@task_group
def expanding(n):
@task.branch
def branching(n):
print(n)
if n == 1:
return "expanding.foo"
else:
return "expanding.bar"
@task
def foo(n):
print(n)
return n + 1
@task
def bar(n):
print(n)
return n + 3
@task(trigger_rule='none_failed_min_one_success')
def finalize(x, y):
if x is not None:
return x
if y is not None:
return y
return None
choose_tech_branch_result = branching(n)
foo_result = foo(n)
bar_result = bar(n)
choose_tech_branch_result >> [ foo_result, bar_result ]
finalize_result = finalize(foo_result, bar_result)
[ foo_result, bar_result ] >> finalize_result
return finalize_result
@task
def finalize_all(group_results):
print(group_results)
return group_results
@dag(dag_id="branching",
start_date=days_ago(1),
schedule_interval=None)
def branch_example():
group_results = expanding.expand(n=start())
finalizer_result = finalize_all(group_results)
print(finalizer_result)
branch_example()
```
Workaround: pass argument `n` to task ´finalize` even if it's not used.
seams to be an issue with upstream evaluation.
```
from airflow.utils.dates import days_ago
from airflow.decorators import dag, task, task_group
@task
def start():
return [ 1, 2, 3 ]
@task_group
def expanding(n):
@task.branch
def branching(n):
print(n)
if n == 1:
return "expanding.foo"
else:
return "expanding.bar"
@task
def foo(n):
print(n)
return n + 1
@task
def bar(n):
print(n)
return n + 3
@task(trigger_rule='none_failed_min_one_success')
def finalize(_, x, y):
if x is not None:
return x
if y is not None:
return y
return None
choose_tech_branch_result = branching(n)
foo_result = foo(n)
bar_result = bar(n)
choose_tech_branch_result >> [ foo_result, bar_result ]
finalize_result = finalize(n, foo_result, bar_result)
[ foo_result, bar_result ] >> finalize_result
return finalize_result
@task
def finalize_all(group_results):
print(group_results)
return group_results
@dag(dag_id="branching",
start_date=days_ago(1),
schedule_interval=None)
def branch_example():
group_results = expanding.expand(n=start())
finalizer_result = finalize_all(group_results)
print(finalizer_result)
branch_example()
```
### What you think should happen instead?
_No response_
### How to reproduce
see comment/code
### Operating System
Linux
### Versions of Apache Airflow Providers
_No response_
### Deployment
Official Apache Airflow Helm Chart
### 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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