psigen opened a new issue #13602:
URL: https://github.com/apache/airflow/issues/13602
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**Apache Airflow version**: 2.0.0
**Kubernetes version (if you are using kubernetes)** (use `kubectl
version`): N/A
**Environment**:
- **Cloud provider or hardware configuration**: docker-compose
- **OS** (e.g. from /etc/os-release): Docker `apache/airflow`
`sha256:b4f957bef5a54ca0d781ae1431d8485f125f0b5d18f3bc7e0416c46e617db265`
- **Kernel** (e.g. `uname -a`): Linux c697ae3a0397 5.4.0-58-generic
#64~18.04.1-Ubuntu SMP Wed Dec 9 17:11:11 UTC 2020 x86_64 GNU/Linux
- **Install tools**: docker
- **Others**:
**What happened**:
When an event that does not include a DAG is logged in the UI, this event
lists the DAG ID as "None". This "None" is treated as an actual DAG ID with a
link, which throws an error if clicked.
```
Something bad has happened.
Please consider letting us know by creating a bug report using GitHub.
Python version: 3.6.12
Airflow version: 2.0.0
Node: 9097c882a712
-------------------------------------------------------------------------------
Traceback (most recent call last):
File "/home/airflow/.local/lib/python3.6/site-packages/flask/app.py", line
2447, in wsgi_app
response = self.full_dispatch_request()
File "/home/airflow/.local/lib/python3.6/site-packages/flask/app.py", line
1952, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/airflow/.local/lib/python3.6/site-packages/flask/app.py", line
1821, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/airflow/.local/lib/python3.6/site-packages/flask/_compat.py",
line 39, in reraise
raise value
File "/home/airflow/.local/lib/python3.6/site-packages/flask/app.py", line
1950, in full_dispatch_request
rv = self.dispatch_request()
File "/home/airflow/.local/lib/python3.6/site-packages/flask/app.py", line
1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/www/auth.py", line
34, in decorated
return func(*args, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/www/decorators.py",
line 97, in view_func
return f(*args, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/www/decorators.py",
line 60, in wrapper
return f(*args, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/utils/session.py",
line 65, in wrapper
return func(*args, session=session, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/www/views.py", line
2028, in graph
dag = current_app.dag_bag.get_dag(dag_id)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/utils/session.py",
line 65, in wrapper
return func(*args, session=session, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/models/dagbag.py",
line 171, in get_dag
self._add_dag_from_db(dag_id=dag_id, session=session)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/models/dagbag.py",
line 227, in _add_dag_from_db
raise SerializedDagNotFound(f"DAG '{dag_id}' not found in serialized_dag
table")
airflow.exceptions.SerializedDagNotFound: DAG 'None' not found in
serialized_dag table
```
<!-- (please include exact error messages if you can) -->
**What you expected to happen**:
I expected `None` to not be a link or have it link to some sort of error
page. Instead it throws an error.
**How to reproduce it**:
Run a CLI command such as `airflow dags list`, then go to `/log/list/` in
the web UI, and click on the `None` *Dag Id* for the logged event for the
command.
**Anything else we need to know**:
This problem appears to occur every time.
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