MatrixManAtYrService opened a new issue #20554:
URL: https://github.com/apache/airflow/issues/20554
### Apache Airflow version
2.2.3 (latest released)
### What happened
Here's a dag, I expect it to create 5 dagruns when unpaused, and it does.
```python3
from airflow import DAG
from airflow.operators.python_operator import PythonOperator
from datetime import datetime, timedelta
from textwrap import dedent
from time import sleep
decade = 31556952 * 10
with DAG(
"count_sla_misses",
start_date=datetime(1970, 1, 1),
schedule_interval=timedelta(seconds=decade),
catchup=True,
doc_md=dedent(
"""
# Purpose
Generate an expected SLA misses
## To Test
1. Unpause the dag
2. Wait for dagruns to complete
3. [browse] -> [SLA Misses]
## Expect
five dagruns, and five SLA misses:
- 1970 - 1980
- 1980 - 1990
- 1990 - 2000
- 2000 - 2010
- 2010 - 2020
"""
),
) as miss:
PythonOperator(
task_id="miss",
python_callable=lambda x: sleep(x),
op_args=[20],
sla=timedelta(seconds=15),
)
```
### What you expected to happen
I also expect it to create five SLA misses, but only four show up:
### How to reproduce
unpause the dag
let catchup run it five times
notice only four misses
### Operating System
docker / debian
### Versions of Apache Airflow Providers
n/a
### Deployment
Astronomer
### Deployment details
`astro dev start` with dockerfile:
```
FROM quay.io/astronomer/ap-airflow:2.2.3-onbuild
```
### Anything else
If this is somehow desired behavior, I can submit a docs change PR if
somebody explains to me why it's desired. But it smells like an actual bug to
me.
### 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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