What does this mean?
I recently changed my celery install to use postgres instead of MySQL,
and I may have been trying to send an email from a celery task... when this
happened.
2013-09-03 21:56:47,917 ERROR [waitress][Dummy-3] Exception when serving
/api/user
Traceback (most recent call last):
File
"/opt/env/local/lib/python2.7/site-packages/waitress-0.8.5-py2.7.egg/waitress/channel.py",
line 332, in service
task.service()
File
"/opt/env/local/lib/python2.7/site-packages/waitress-0.8.5-py2.7.egg/waitress/task.py",
line 174, in service
self.execute()
File
"/opt/env/local/lib/python2.7/site-packages/waitress-0.8.5-py2.7.egg/waitress/task.py",
line 382, in execute
app_iter = self.channel.server.application(env, start_response)
File
"/opt/env/local/lib/python2.7/site-packages/pyramid-1.4.3-py2.7.egg/pyramid/router.py",
line 251, in __call__
response = self.invoke_subrequest(request, use_tweens=True)
File
"/opt/env/local/lib/python2.7/site-packages/pyramid-1.4.3-py2.7.egg/pyramid/router.py",
line 227, in invoke_subrequest
response = handle_request(request)
File
"/opt/env/local/lib/python2.7/site-packages/pyramid-1.4.3-py2.7.egg/pyramid/tweens.py",
line 40, in excview_tween
response = view_callable(exc, request)
File
"/opt/env/local/lib/python2.7/site-packages/pyramid-1.4.3-py2.7.egg/pyramid/config/views.py",
line 396, in viewresult_to_response
raise ValueError(msg % (view_description(view), result))
ValueError: Could not convert return value of the view callable function
cornice.pyramidhook.handle_exceptions into a response object. The value
returned was UnmappedClassError("Class
'kombu.transport.sqlalchemy.models.Message' is not mapped",).
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