bintocher opened a new issue #15066:
URL: https://github.com/apache/airflow/issues/15066


   Hi,
   i'll try open Admin-XComs (http://url/xcom/list/) and get error page:
   
   Something bad has happened.
   Please consider letting us know by creating a bug report using GitHub.
   
   Python version: 3.7.3
   Airflow version: 2.0.1
   Node: hostname.local
   
-------------------------------------------------------------------------------
   Traceback (most recent call last):
     File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 2447, in 
wsgi_app
       response = self.full_dispatch_request()
     File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1952, in 
full_dispatch_request
       rv = self.handle_user_exception(e)
     File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1821, in 
handle_user_exception
       reraise(exc_type, exc_value, tb)
     File "/usr/local/lib/python3.7/dist-packages/flask/_compat.py", line 39, 
in reraise
       raise value
     File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1950, in 
full_dispatch_request
       rv = self.dispatch_request()
     File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1936, in 
dispatch_request
       return self.view_functions[rule.endpoint](**req.view_args)
     File 
"/usr/local/lib/python3.7/dist-packages/flask_appbuilder/security/decorators.py",
 line 109, in wraps
       return f(self, *args, **kwargs)
     File "/usr/local/lib/python3.7/dist-packages/flask_appbuilder/views.py", 
line 551, in list
       widgets = self._list()
     File 
"/usr/local/lib/python3.7/dist-packages/flask_appbuilder/baseviews.py", line 
1127, in _list
       page_size=page_size,
     File 
"/usr/local/lib/python3.7/dist-packages/flask_appbuilder/baseviews.py", line 
1026, in _get_list_widget
       page_size=page_size,
     File 
"/usr/local/lib/python3.7/dist-packages/flask_appbuilder/models/sqla/interface.py",
 line 435, in query
       query_results = query.all()
     File "/usr/local/lib/python3.7/dist-packages/sqlalchemy/orm/query.py", 
line 3373, in all
       return list(self)
     File "/usr/local/lib/python3.7/dist-packages/sqlalchemy/orm/loading.py", 
line 100, in instances
       cursor.close()
     File 
"/usr/local/lib/python3.7/dist-packages/sqlalchemy/util/langhelpers.py", line 
70, in __exit__
       with_traceback=exc_tb,
     File "/usr/local/lib/python3.7/dist-packages/sqlalchemy/util/compat.py", 
line 182, in raise_
       raise exception
     File "/usr/local/lib/python3.7/dist-packages/sqlalchemy/orm/loading.py", 
line 80, in instances
       rows = [proc(row) for row in fetch]
     File "/usr/local/lib/python3.7/dist-packages/sqlalchemy/orm/loading.py", 
line 80, in <listcomp>
       rows = [proc(row) for row in fetch]
     File "/usr/local/lib/python3.7/dist-packages/sqlalchemy/orm/loading.py", 
line 601, in _instance
       state.manager.dispatch.load(state, context)
     File "/usr/local/lib/python3.7/dist-packages/sqlalchemy/event/attr.py", 
line 322, in __call__
       fn(*args, **kw)
     File "/usr/local/lib/python3.7/dist-packages/sqlalchemy/orm/mapper.py", 
line 3397, in _event_on_load
       instrumenting_mapper._reconstructor(state.obj())
     File "/usr/local/lib/python3.7/dist-packages/airflow/models/xcom.py", line 
66, in init_on_load
       self.value = self.orm_deserialize_value()
     File "/usr/local/lib/python3.7/dist-packages/airflow/models/xcom.py", line 
274, in orm_deserialize_value
       return BaseXCom.deserialize_value(self)
     File "/usr/local/lib/python3.7/dist-packages/airflow/models/xcom.py", line 
251, in deserialize_value
       return pickle.loads(result.value)
   ModuleNotFoundError: No module named 
'unusual_prefix_06d086af3242da40550adef1deae85607495751f_np_run_test_task'


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