[jira] [Created] (AIRFLOW-2384) Flask 0.12.3+ breaks Airflow webserver

["Kyle Hamlin (JIRA)" <ji...@apache.org>]

Kyle Hamlin created AIRFLOW-2384:
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             Summary: Flask 0.12.3+ breaks Airflow webserver
                 Key: AIRFLOW-2384
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-2384
             Project: Apache Airflow
          Issue Type: Bug
          Components: webserver
    Affects Versions: 1.10.0
            Reporter: Kyle Hamlin
             Fix For: 1.10.0


Flask 12.3.0 and 1.0.0 were released about an hour ago with breaking changes to Airflows webserver
{code:java}
File "/usr/local/lib/python3.6/site-packages/gunicorn/workers/sync.py", line 135, in handle
self.handle_request(listener, req, client, addr)
File "/usr/local/lib/python3.6/site-packages/gunicorn/workers/sync.py", line 176, in handle_request
respiter = self.wsgi(environ, resp.start_response)
File "/usr/local/lib/python3.6/site-packages/werkzeug/wsgi.py", line 826, in __call__
return app(environ, start_response)
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1997, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1978, in wsgi_app
ctx.push()
File "/usr/local/lib/python3.6/site-packages/flask/ctx.py", line 332, in push
self.session = self.app.open_session(self.request)
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 912, in open_session
return self.session_interface.open_session(self, request)
File "/usr/local/lib/python3.6/site-packages/flask/sessions.py", line 324, in open_session
s = self.get_signing_serializer(app)
File "/usr/local/lib/python3.6/site-packages/flask/sessions.py", line 321, in get_signing_serializer
signer_kwargs=signer_kwargs)
File "/usr/local/lib/python3.6/site-packages/itsdangerous.py", line 519, in __init__
self.is_text_serializer = is_text_serializer(serializer)
File "/usr/local/lib/python3.6/site-packages/itsdangerous.py", line 69, in is_text_serializer
return isinstance(serializer.dumps({}), text_type)
File "/usr/local/lib/python3.6/site-packages/flask/sessions.py", line 85, in dumps
return json.dumps(_tag(value), separators=(',', ':'))
File "/usr/local/lib/python3.6/site-packages/flask/json/__init__.py", line 177, in dumps
_dump_arg_defaults(kwargs)
File "/usr/local/lib/python3.6/site-packages/flask/json/__init__.py", line 98, in _dump_arg_defaults
bp.json_encoder if bp and bp.json_encoder
AttributeError: 'Blueprint' object has no attribute 'json_encoder'{code}



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