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https://issues.apache.org/jira/browse/AIRFLOW-2263?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16613618#comment-16613618
]
ASF GitHub Bot commented on AIRFLOW-2263:
-----------------------------------------
marklavrynenko-original opened a new pull request #3897: [AIRFLOW-2263] Fix 500
for null DAG
URL: https://github.com/apache/incubator-airflow/pull/3897
### Jira
My PR addresses the following
[AIRFLOW-2263](https://issues.apache.org/jira/browse/AIRFLOW-2263)
### Description
Remove 500-error when opening non-existent DAG in webserver UI
`/admin/airflow/tree?dag_id=some_garbage`
Return 404 response instead
### Tests
My PR do not add new unit tests
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> stack trace from null dag in webserver output
> ---------------------------------------------
>
> Key: AIRFLOW-2263
> URL: https://issues.apache.org/jira/browse/AIRFLOW-2263
> Project: Apache Airflow
> Issue Type: Bug
> Reporter: andy dreyfuss
> Assignee: Mark Lavrynenko
> Priority: Major
>
> webserver is reporting the following
> {code:java}
> Traceback (most recent call last):
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask/app.py", line
> 1988, in wsgi_app
> response = self.full_dispatch_request()
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask/app.py", line
> 1641, in full_dispatch_request
> rv = self.handle_user_exception(e)
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask/app.py", line
> 1544, in handle_user_exception
> reraise(exc_type, exc_value, tb)
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask/_compat.py",
> line 33, in reraise
> raise value
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask/app.py", line
> 1639, in full_dispatch_request
> rv = self.dispatch_request()
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask/app.py", line
> 1625, in dispatch_request
> return self.view_functions[rule.endpoint](**req.view_args)
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask_admin/base.py",
> line 69, in inner
> return self._run_view(f, *args, **kwargs)
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask_admin/base.py",
> line 368, in _run_view
> return fn(self, *args, **kwargs)
> File "/path/to/a/virtualenv/lib/python3.6/site-packages/flask_login.py", line
> 755, in decorated_view
> return func(*args, **kwargs)
> File
> "/path/to/a/virtualenv/lib/python3.6/site-packages/airflow/www/utils.py",
> line 356, in view_func
> return f(*args, **kwargs)
> File
> "/path/to/a/virtualenv/lib/python3.6/site-packages/airflow/www/utils.py",
> line 262, in wrapper
> return f(*args, **kwargs)
> File
> "/path/to/a/virtualenv/lib/python3.6/site-packages/airflow/www/views.py",
> line 1154, in tree
> base_date = dag.latest_execution_date or datetime.utcnow()
> AttributeError: 'NoneType' object has no attribute 'latest_execution_date'
>
> {code}
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