HugoCornu opened a new issue, #25942:
URL: https://github.com/apache/airflow/issues/25942
### Apache Airflow version
Other Airflow 2 version
### What happened
Every time we make a new dag. The first time we launch it, it runs twice.
### What you think should happen instead
The dag should run only once.
### How to reproduce
Here is a dag with the issue :
```
from datetime import datetime, timedelta
from textwrap import dedent
# The DAG object; we'll need this to instantiate a DAG
from airflow import DAG
# Operators; we need this to operate!
from airflow.operators.bash import BashOperator
with DAG(
"tutorial",
# These args will get passed on to each operator
# You can override them on a per-task basis during operator
initialization
default_args={
"depends_on_past": False,
"email": ["[email protected]"],
"email_on_failure": False,
"email_on_retry": False,
"retries": 1,
"retry_delay": timedelta(minutes=5),
},
description="A simple tutorial DAG",
schedule_interval=timedelta(days=1),
start_date=datetime(2021, 1, 1),
catchup=False,
tags=["example"],
) as dag:
# t1, t2 and t3 are examples of tasks created by instantiating operators
t1 = BashOperator(
task_id="print_date",
bash_command="date",
)
t2 = BashOperator(
task_id="sleep",
depends_on_past=False,
bash_command="sleep 5",
retries=3,
)
t1.doc_md = dedent(
"""\
#### Task Documentation
You can document your task using the attributes `doc_md` (markdown),
`doc` (plain text), `doc_rst`, `doc_json`, `doc_yaml` which gets
rendered in the UI's Task Instance Details page.
"""
)
dag.doc_md = (
__doc__ # providing that you have a docstring at the beginning of
the DAG
)
dag.doc_md = """
This is a documentation placed anywhere
""" # otherwise, type it like this
templated_command = dedent(
"""
{% for i in range(5) %}
echo "{{ ds }}"
echo "{{ macros.ds_add(ds, 7)}}"
{% endfor %}
"""
)
t3 = BashOperator(
task_id="templated",
depends_on_past=False,
bash_command=templated_command,
)
t1 >> [t2, t3]
```
### Operating System
its on AWS MWAA (linux I guess)
### Versions of Apache Airflow Providers
<html><body>
<!--StartFragment-->
Package Name | Version | Description
-- | -- | --
apache-airflow-providers-amazon | 2.4.0 | Amazon integration (including
Amazon Web Services (AWS)).
apache-airflow-providers-celery | 2.1.0 | Celery
apache-airflow-providers-docker | 3.1.0 | Docker
apache-airflow-providers-ftp | 2.0.1 | File Transfer Protocol (FTP)
apache-airflow-providers-http | 2.0.1 | Hypertext Transfer Protocol (HTTP)
apache-airflow-providers-imap | 2.0.1 | Internet Message Access Protocol
(IMAP)
apache-airflow-providers-postgres | 2.3.0 | PostgreSQL
apache-airflow-providers-sqlite | 2.0.1 | SQLite
<!--EndFragment-->
</body>
</html>
### Deployment
MWAA
### Deployment details
MWAA with airflow 2.2.2
### 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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