Pandry commented on issue #44685:
URL: https://github.com/apache/airflow/issues/44685#issuecomment-2746486219
Hi
I can observe the same behavior, and I'd like to drop the request body of
the second call,
`/api/v1/dags/<dag_id>/dagRuns/<run_id>/taskInstances/<task_id>/dependencies`,
which is a bit different:
```
{
"detail": null,
"status": 404,
"title": "Task Instance not found for dag_id=<dag_id>,
run_id=scheduled__2025-03-23T21:00:00+00:00, task_id=<task_id>",
"type":
"https://airflow.apache.org/docs/apache-airflow/2.10.0/stable-rest-api-ref.html#section/Errors/NotFound";
}
```
In my case the behavior is not consistent (so I'm starting to suspect an
error on the database side, perhaps too slow) and it tends to happen on
failures (but perhaps that's a bias of mine, as I tend to open errored tasks)
I'm also trying to reproduce it (locally, with `airflow standalone`),
without much success (perhaps SQLite is too fast?)
<details><summary>Code that does not reproduce the error</summary>
```python
import random, pendulum
from airflow.decorators import task, task_group, dag
@task(retries=0)
def may_fail(perc=0.1):
r = random.uniform(0, 1)
if r <= perc:
raise RuntimeError("foo")
return
@task
def echo():
return "Hi!"
@dag(schedule_interval='*/1 * * * *', start_date=pendulum.datetime(2021, 1,
1, tz="UTC"), catchup=False)
def error_test():
@task_group
def fail(foo):
may_fail()
a = may_fail(.2)
b = may_fail(foo)
a >> b
f = fail.expand(foo=[i/10 for i in range (1,7)])
echo() >> f >> echo()
error_test()
```
</details>
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