Comment 2 for bug 1678204

I also see more tricky behavior.

Assume user A has admin role for project X and member role for project Y.
When I opened Admin -> Network (for example) with Project X and then switched the project to project Y.
I was kicked out to the login form with a message "Unauthorized. Please try logging in again."
I tried to log-in with user A (of course I used a correct password), but I got the same message again "Unauthorized. Please try logging in again."

According to the horizon log, I got the unauthorized exception from tenant_list().

Unauthorized:
Traceback (most recent call last):
  File "/opt/stack/horizon/openstack_dashboard/dashboards/admin/networks/views.py", line 56, in _get_tenant_list
    tenants, has_more = api.keystone.tenant_list(self.request)
  File "/opt/stack/horizon/openstack_dashboard/api/keystone.py", line 352, in tenant_list
    manager = VERSIONS.get_project_manager(request, admin=admin)
  File "/opt/stack/horizon/openstack_dashboard/api/keystone.py", line 61, in get_project_manager
    manager = keystoneclient(*args, **kwargs).projects
  File "/opt/stack/horizon/openstack_dashboard/api/keystone.py", line 170, in keystoneclient
    raise exceptions.NotAuthorized
NotAuthorized

The URL is http://sheep6:8000/auth/login/?next=/admin/networks/ and I think the dashboard tried to open the admin dashboard again.

I am afraid that the current behavior of horizon potentially has a problem that a user cannot login forever without changing the URL explicitly if the user has both admin for one project and member for another project.