User.DoesNotExist error in files API

[hackdna]

• Specific code commit: dbb1848
• Version of the web browser and OS: Chrome 71 on OS X 10.14.2
• Environment where the error occurred: AWS and Vagrant

Steps to reproduce

1. Deploy on AWS without specifying EBS and RDS snapshot IDs or provision a Vagrant VM from scratch
2. Open the home page in a web browser

Observed behavior

Refinery error log:

Internal Server Error: /api/v2/files/
Traceback (most recent call last):
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/django/core/handlers/base.py", line 132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/rest_framework/views.py", line 466, in dispatch
    response = self.handle_exception(exc)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/rest_framework/views.py", line 463, in dispatch
    response = handler(request, *args, **kwargs)
  File "/srv/refinery-platform/refinery/user_files_manager/views.py", line 74, in get
    solr_response = _get_solr(request.query_params, request.user.id)
  File "/srv/refinery-platform/refinery/user_files_manager/views.py", line 83, in _get_solr
    user_id=user_id)
  File "/srv/refinery-platform/refinery/user_files_manager/utils.py", line 30, in generate_solr_params_for_user
    user = User.get_anonymous()
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/guardian/__init__.py", line 26, in <lambda>
    setattr(User, 'get_anonymous', staticmethod(lambda: get_anonymous_user()))
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/guardian/utils.py", line 38, in get_anonymous_user
    return User.objects.get(**lookup)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/django/db/models/manager.py", line 127, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/django/db/models/query.py", line 334, in get
    self.model._meta.object_name
DoesNotExist: User matching query does not exist.

Request repr():
<WSGIRequest
path:/api/v2/files/,
GET:<QueryDict: {u'sort': [u''], u'limit': [u'100'], u'filter_attribute': [u'{}']}>,
POST:<QueryDict: {}>,
COOKIES:{},
META:{'CONTEXT_DOCUMENT_ROOT': '/var/www',
'CONTEXT_PREFIX': '',
u'CSRF_COOKIE': <redacted>,
'DOCUMENT_ROOT': '/var/www',
'GATEWAY_INTERFACE': 'CGI/1.1',
'HTTP_ACCEPT': 'application/json, text/plain, */*',
'HTTP_ACCEPT_ENCODING': 'gzip, deflate, br',
'HTTP_ACCEPT_LANGUAGE': 'en-US,en;q=0.9',
'HTTP_CONNECTION': 'keep-alive',
'HTTP_DNT': '1',
'HTTP_HOST': 'dev.stemcellcommons.org',
'HTTP_REFERER': 'https://dev.stemcellcommons.org/',
'HTTP_USER_AGENT': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36',
'HTTP_X_FORWARDED_FOR': '134.174.183.128',
'HTTP_X_FORWARDED_PORT': '443',
'HTTP_X_FORWARDED_PROTO': 'https',
'PATH_INFO': u'/api/v2/files/',
'PATH_TRANSLATED': '/srv/refinery-platform/refinery/config/wsgi_aws.py/api/v2/files/',
'QUERY_STRING': 'filter_attribute=%7B%7D&limit=100&sort=',
'REMOTE_ADDR': '172.25.0.131',
'REMOTE_PORT': '55212',
'REQUEST_METHOD': 'GET',
'REQUEST_SCHEME': 'http',
'REQUEST_URI': '/api/v2/files/?filter_attribute=%7B%7D&limit=100&sort=',
'SCRIPT_FILENAME': '/srv/refinery-platform/refinery/config/wsgi_aws.py',
'SCRIPT_NAME': u'',
'SCRIPT_URI': 'http://dev.stemcellcommons.org/api/v2/files/',
'SCRIPT_URL': '/api/v2/files/',
'SERVER_ADDR': '172.25.0.218',
'SERVER_ADMIN': '[no address given]',
'SERVER_NAME': 'dev.stemcellcommons.org',
'SERVER_PORT': '80',
'SERVER_PROTOCOL': 'HTTP/1.1',
'SERVER_SIGNATURE': '',
'SERVER_SOFTWARE': 'Apache/2.4.7 (Ubuntu)',
'mod_wsgi.application_group': 'dev.stemcellcommons.org|',
'mod_wsgi.callable_object': 'application',
'mod_wsgi.enable_sendfile': '0',
'mod_wsgi.handler_script': '',
'mod_wsgi.input_chunked': '0',
'mod_wsgi.listener_host': '',
'mod_wsgi.listener_port': '80',
'mod_wsgi.process_group': 'refinery',
'mod_wsgi.queue_start': '1547673199613305',
'mod_wsgi.request_handler': 'wsgi-script',
'mod_wsgi.script_reloading': '1',
'mod_wsgi.version': (3, 4),
'wsgi.errors': <mod_wsgi.Log object at 0x7fa7e04a1cb0>,
'wsgi.file_wrapper': <built-in method file_wrapper of mod_wsgi.Adapter object at 0x7fa7e0489378>,
'wsgi.input': <mod_wsgi.Input object at 0x7fa7e052adf0>,
'wsgi.multiprocess': False,
'wsgi.multithread': True,
'wsgi.run_once': False,
'wsgi.url_scheme': 'http',
'wsgi.version': (1, 0)}>

Expected behavior

No error

[jkmarx]

I've been able to reproduce once with a clean instance but the error does not linger on a refresh and I couldn't reproduce on subsequent tries (with fresh vm). Not a solr issue but grabbing the anonymous user in a wrapper function for user_files. I didn't see any issues in the UI.

[hackdna]

I was able to reproduce this repeatedly in a fresh VM running the latest develop (03c076d) by force reloading the home page (Cmd-Shift-R in Chrome).

[jkmarx]

@hackdna Are you seeing this issue locally at all?

[jkmarx]

Can you confirm you're not logged in?

[hackdna]

Yes: locally when not logged in.

[jkmarx]

@hackdna Do you have any data sets loaded?

[hackdna]

No, just like it's described in steps to reproduce above.

[jkmarx]

Anon User is no longer being generated.

[jkmarx]

@hackdna
"Once project is configured to work with django-guardian, calling syncdb management command would create User instance for anonymous user support (with name of AnonymousUser)." https://django-guardian.readthedocs.io/en/stable/configuration.html?highlight=anon

Running fab vm update resolves the issue. I'll add an error handler when the anonymous user isn't available for user/files.