perfSONAR User Q&A and Other Discussion

[Antoine Delvaux <>]

Hello Frank,

It seems a newer python-djangorestframework-filters slipped into our 4.0 
repository when it should have stayed in the 4.1-beta repository.  It might 
cause the problem you're experiencing.

Can you please double check which version of 
python-djangorestframework-filters you have installed?  This can be seen 
through `apt-cache show python-djangorestframework-filters`  If you see you 
have version 0.10.2-2 installed, it is the problem.

In that case, you need to downgrade to version 0.6.0-2 which is now correctly 
present in our repository.  You should be able to do that through the 
following commands:

apt-get purge python-djangorestframework-filters
apt-get install perfsonar-toolkit

A few other packages will get uninstalled at the same time, it's normal.  
You'll also be asked if you want to delete the esmond database during this 
re-installation, it safe to answer 'yes' as it will be recreated anew.

Let us know how it goes,

Thanks,

Antoine.

> Le 3 août 2018 à 18:53, 
> 
>  a écrit :
> 
> Hello all,
> 
> I have installed pS 4.0 on Ubuntu 16.04. Running fine except getting an
> internal server error. The esmond is not running properly.
> 
> Anyone can point out a fix if ever experienced this? Thanks!
> 
> Regards,
> Frank
> 
> Below is from the django log.
> 
> ImportError: Could not import
> 'rest_framework_filters.backends.DjangoFilterBackend' for API setting
> 'DEFAULT_FILTER_BACKENDS'. ImportError: cannot import name rest_framework.
> 
> 2018-08-03 13:31:42,789 [ERROR]
> /usr/lib/python2.7/dist-packages/django/core/handlers/base.py: Internal 
> Server
> Error: /esmond/perfsonar/archive/
> Traceback (most recent call last):
>  File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line
> 119, in get_response
>    resolver_match = resolver.resolve(request.path_info)
>  File "/usr/lib/python2.7/dist-packages/django/core/urlresolvers.py", line
> 365, in resolve
>    for pattern in self.url_patterns:
>  File "/usr/lib/python2.7/dist-packages/django/core/urlresolvers.py", line
> 401, in url_patterns
>    patterns = getattr(self.urlconf_module, "urlpatterns",
> self.urlconf_module)
>  File "/usr/lib/python2.7/dist-packages/django/core/urlresolvers.py", line
> 395, in urlconf_module
>    self._urlconf_module = import_module(self.urlconf_name)
>  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
>    __import__(name)
>  File "/usr/lib/python2.7/dist-packages/esmond/urls.py", line 10, in 
> <module>
>    from esmond.api.api_v2 import (
>  File "/usr/lib/python2.7/dist-packages/esmond/api/api_v2.py", line 18, in
> <module>
>    from rest_framework import (viewsets, serializers, status,
>  File "/usr/lib/python2.7/dist-packages/rest_framework/viewsets.py", line 
> 26,
> in <module>
>    from rest_framework import generics, mixins, views
>  File "/usr/lib/python2.7/dist-packages/rest_framework/generics.py", line 
> 25,
> in <module>
>    class GenericAPIView(views.APIView):
>  File "/usr/lib/python2.7/dist-packages/rest_framework/generics.py", line 
> 44,
> in GenericAPIView
>    filter_backends = api_settings.DEFAULT_FILTER_BACKENDS
>  File "/usr/lib/python2.7/dist-packages/rest_framework/settings.py", line
> 205, in __getattr__
>    val = perform_import(val, attr)
>  File "/usr/lib/python2.7/dist-packages/rest_framework/settings.py", line
> 150, in perform_import
>    return [import_from_string(item, setting_name) for item in val]
>  File "/usr/lib/python2.7/dist-packages/rest_framework/settings.py", line
> 166, in import_from_string
>    raise ImportError(msg)
> ImportError: Could not import
> 'rest_framework_filters.backends.DjangoFilterBackend' for API setting
> 'DEFAULT_FILTER_BACKENDS'. ImportError: cannot import name rest_framework.
> --
> To unsubscribe from this list: 
> https://lists.internet2.edu/sympa/signoff/perfsonar-user