Scan with no body fails with 500

[Ajaya Agrawal]

No body in scan request.

Actual error code: 500
Expected: 400

The stack-trace is:
2015-02-20 15:50:50.180 8739 ERROR magnetodb.common.middleware.fault [req-4a7fbe26-1aad-4e2c-929f-06818c408fa1 default_user default_tenant] sca$
() takes exactly 5 arguments (4 given)
Traceback (most recent call last):
  File "/home/aj/stack/magnetodb/magnetodb/common/middleware/fault.py", line 115, in process_request
    return req.get_response(self.application)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1320, in send
    application, catch_exc_info=False)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1284, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/home/aj/stack/magnetodb/magnetodb/common/wsgi.py", line 63, in __call__
    response = req.get_response(self.application)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1320, in send
    application, catch_exc_info=False)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1284, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/home/aj/stack/magnetodb/magnetodb/common/wsgi.py", line 63, in __call__
    response = req.get_response(self.application)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1320, in send
    application, catch_exc_info=False)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1284, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
    return resp(environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/routes/middleware.py", line 136, in __call__
    response = self.app(environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
    return resp(environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
  resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/home/aj/stack/magnetodb/magnetodb/common/wsgi.py", line 246, in __call__
    action_result = self.execute_action(action, request, **action_args)
  File "/home/aj/stack/magnetodb/magnetodb/common/wsgi.py", line 260, in execute_action
    return self.dispatch(self.controller, action, request, **action_args)
  File "/home/aj/stack/magnetodb/magnetodb/common/wsgi.py", line 269, in dispatch
    return method(*args, **kwargs)
  File "/home/aj/stack/magnetodb/magnetodb/api/__init__.py", line 35, in wrapper
    return f(self, *args, **kwargs)
  File "/home/aj/stack/magnetodb/magnetodb/common/probe.py", line 94, in wrapper
    return f(*args, **kwargs)
TypeError: scan() takes exactly 5 arguments (4 given)

[Andrii Ostapenko (aostapenko)]

Add request please, is body empty or absent?

[Ajaya Agrawal (ajayaa)]

Tried with both. Didn't work.

[Andrii Ostapenko (aostapenko)]

Scan works with empty body, however we have a bug in python-magnetodbclient. If request file contains '{}' no body is present in request. However scan fails with 500 if no body provided

[Andrii Ostapenko (aostapenko)]

Related bug in python-magnetodbclient https://launchpad.net/bugs/1423993