turbaszek opened a new issue #11328:
URL: https://github.com/apache/airflow/issues/11328
**Apache Airflow version**:
1.1010, 1.10.12 and probably previous ones. On master it doesn't occur.
**Environment**:
Tested with breeze and 1.1010 and 1.10.12 versions.
**What happened**:
```
____/ ( ( ) ) \___
/( ( ( ) _ )) ) )\
(( ( )( ) ) ( ) )
((/ ( _( ) ( _) ) ( () ) )
( ( ( (_) (( ( ) .((_ ) . )_
( ( ) ( ( ) ) ) . ) ( )
( ( ( ( ) ( _ ( _) ). ) . ) ) ( )
( ( ( ) ( ) ( )) ) _)( ) ) )
( ( ( \ ) ( (_ ( ) ( ) ) ) ) )) ( )
( ( ( ( (_ ( ) ( _ ) ) ( ) ) )
( ( ( ( ( ) (_ ) ) ) _) ) _( ( )
(( ( )( ( _ ) _) _(_ ( (_ )
(_((__(_(__(( ( ( | ) ) ) )_))__))_)___)
((__) \\||lll|l||/// \_))
( /(/ ( ) ) )\ )
( ( ( ( | | ) ) )\ )
( /(| / ( )) ) ) )) )
( ( ((((_(|)_))))) )
( ||\(|(|)|/|| )
( |(||(||)|||| )
( //|/l|||)|\\ \ )
(/ / // /|//||||\\ \ \ \ _)
-------------------------------------------------------------------------------
Node: 72e5af4b0b01
-------------------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2447, in
wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1952, in
full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1821, in
handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 39,
in reraise
raise value
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1950, in
full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1936, in
dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/usr/local/lib/python3.7/site-packages/flask_admin/base.py", line
69, in inner
return self._run_view(f, *args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/flask_admin/base.py", line
368, in _run_view
return fn(self, *args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/flask_login/utils.py", line
258, in decorated_view
return func(*args, **kwargs)
File "/opt/airflow/airflow/www/utils.py", line 290, in wrapper
return f(*args, **kwargs)
File "/opt/airflow/airflow/www/views.py", line 1064, in task
dep_context=dep_context)]
File "/opt/airflow/airflow/www/views.py", line 1062, in <listcomp>
failed_dep_reasons = [(dep.dep_name, dep.reason) for dep in
File "/opt/airflow/airflow/models/taskinstance.py", line 683, in
get_failed_dep_statuses
dep_context):
File "/opt/airflow/airflow/ti_deps/deps/base_ti_dep.py", line 106, in
get_dep_statuses
for dep_status in self._get_dep_statuses(ti, session, dep_context):
File "/opt/airflow/airflow/ti_deps/deps/dagrun_id_dep.py", line 51, in
_get_dep_statuses
if not dagrun.run_id or not match(BackfillJob.ID_PREFIX + '.*',
dagrun.run_id):
AttributeError: 'NoneType' object has no attribute 'run_id'
```
**What you expected to happen**:
There's no error.
**How to reproduce it**:
Follow those steps
```
airflow resetdb -y
airflow webserver -w 1 -D
```
go to the webserver address (`https://0.0.0.0:28080/` in case o breeze).
Click any DAG from the list (for example `example_bash_operator`). Go to
graph view and click on any task (for example 'runme_1') and then click on
"Task Instance Details" you should see the error from above.
In case of breeze just go to:
http://0.0.0.0:28080/admin/airflow/task?task_id=runme_1&dag_id=example_bash_operator&execution_date=2020-10-07T12%3A52%3A03.694478%2B00%3A00
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