A few users have come into IRC to report that their installations fail to process videos with the following error.

File '/srv/mediagoblin.example.org/mediagoblin/mediagoblin/media_types/video/processing.py', line 396 in process
  self.generate_thumb(thumb_size=thumb_size)
File '/srv/mediagoblin.example.org/mediagoblin/mediagoblin/media_types/video/processing.py', line 319 in generate_thumb
  thumb_size[0])
File '/srv/mediagoblin.example.org/mediagoblin/mediagoblin/media_types/video/transcoders.py', line 136 in capture_thumb
  buffer.extract_dup(0, buffer.get_size()))
File '/usr/lib/python2.7/dist-packages/PIL/Image.py', line 2053 in fromstring
  "Please call frombytes() instead.")
Exception: fromstring() has been removed. Please call frombytes() instead.

Clicking the "Deauthorize applications" link on current master causes a server error.

Error - <class 'sqlalchemy.exc.InvalidRequestError'>: Entity '<class 'mediagoblin.db.models.AccessToken'>' has no property 'user'
URL: https://goblinrefuge.com/mediagoblin/edit/deauthorize/
File '/path/to/mediagoblin/lib/python2.7/site-packages/paste/exceptions/errormiddleware.py', line 144 in __call__
  app_iter = self.application(environ, sr_checker)
File '/path/to/mediagoblin/mediagoblin/app.py', line 342 in __call__
  return self.call_backend(environ, start_response)
File '/path/to/mediagoblin/lib/python2.7/site-packages/Werkzeug-0.10.1-py2.7.egg/werkzeug/wsgi.py', line 591 in __call__
  return self.app(environ, start_response)
File '/path/to/mediagoblin/mediagoblin/app.py', line 276 in call_backend
  return self._finish_call_backend(request, environ, start_response)
File '/path/to/mediagoblin/mediagoblin/app.py', line 318 in _finish_call_backend
  response = controller(request)
File '/path/to/mediagoblin/mediagoblin/decorators.py', line 47 in wrapper
  return controller(request, *args, **kwargs)
File '/path/to/mediagoblin/mediagoblin/decorators.py', line 74 in new_controller_func
  return controller(request, *args, **kwargs)
File '/path/to/mediagoblin/mediagoblin/edit/views.py', line 296 in deauthorize_applications
  access_tokens = AccessToken.query.filter_by(user=request.user.id)
File 'build/bdist.linux-x86_64/egg/sqlalchemy/orm/query.py', line 1256 in filter_by
File 'build/bdist.linux-x86_64/egg/sqlalchemy/orm/util.py', line 1218 in _entity_descriptor
InvalidRequestError: Entity '<class 'mediagoblin.db.models.AccessToken'>' has no property 'user'

We recommend installing flup [1] for fcgi deployments. The latest version of flup on PyPI [2] claims to be a "Python 3.x-only version." Two people have reported issues with this version of flup in a Python 2 installation. One person shared the following log on IRC.

  File "build/bdist.linux-x86_64/egg/flup/server/paste_factory.py", line 125, in run_fcgi_fork
  File "build/bdist.linux-x86_64/egg/flup/server/fcgi_fork.py", line 60, in <module>
  File "build/bdist.linux-x86_64/egg/flup/server/fcgi_base.py", line 45, in <module>
ImportError: No module named _dummy_thread

I don't know if flup has abandoned Python 2 or if this is just a mistake, but it causes issues for people deploying fresh MediaGoblin installs. We could amend the documentation to suggest installing a specific version of flup, or perhaps we could just go ahead and add flup to setup.py, pinned to a specific version.

[1] ​https://mediagoblin.readthedocs.org/en/latest/siteadmin/deploying.html?highlight=flup#install-mediagoblin-and-virtualenv [2] ​https://pypi.python.org/pypi/flup/1.0.3.dev20151210