tylermichael commented on issue #11882:
URL: https://github.com/apache/airflow/issues/11882#issuecomment-733864559
We are also seeing this. Here is the full stack trace I get when I hit
clear. We are running version 1.10.12
```
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/flask_admin/base.py", line
69, in inner
return self._run_view(f, *args, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/flask_admin/base.py", line
368, in _run_view
return fn(self, *args, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/flask_login/utils.py", line
258, in decorated_view
return func(*args, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/www/utils.py", line
290, in wrapper
return f(*args, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/www/utils.py", line
337, in wrapper
return f(*args, **kwargs)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/www/views.py", line
1341, in clear
include_upstream=upstream)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/models/dag.py", line
1244, in sub_dag
for t in regex_match + also_include}
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/models/dag.py", line
1244, in <dictcomp>
for t in regex_match + also_include}
File "/usr/local/lib/python3.6/copy.py", line 161, in deepcopy
y = copier(memo)
File
"/home/airflow/.local/lib/python3.6/site-packages/airflow/models/baseoperator.py",
line 690, in __deepcopy__
setattr(result, k, copy.deepcopy(v, memo))
File "/usr/local/lib/python3.6/copy.py", line 180, in deepcopy
y = _reconstruct(x, memo, *rv)
File "/usr/local/lib/python3.6/copy.py", line 280, in _reconstruct
state = deepcopy(state, memo)
File "/usr/local/lib/python3.6/copy.py", line 150, in deepcopy
y = copier(x, memo)
File "/usr/local/lib/python3.6/copy.py", line 240, in _deepcopy_dict
y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/local/lib/python3.6/copy.py", line 180, in deepcopy
y = _reconstruct(x, memo, *rv)
File "/usr/local/lib/python3.6/copy.py", line 280, in _reconstruct
state = deepcopy(state, memo)
File "/usr/local/lib/python3.6/copy.py", line 150, in deepcopy
y = copier(x, memo)
File "/usr/local/lib/python3.6/copy.py", line 240, in _deepcopy_dict
y[deepcopy(key, memo)] = deepcopy(value, memo)
File "/usr/local/lib/python3.6/copy.py", line 169, in deepcopy
rv = reductor(4)
File "/usr/local/lib/python3.6/multiprocessing/process.py", line 290, in
__reduce__
'Pickling an AuthenticationString object is '
TypeError: Pickling an AuthenticationString object is disallowed for
security reasons
```
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