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# tail -f /var/log/apache2/error.log
....................................................
[Tue Feb 07 09:28:08.785057 2017] [wsgi:error] [pid 18605:tid 140556376606464] Login successful for user "jyh1".
[Tue Feb 07 09:28:15.898270 2017] [wsgi:error] [pid 18605:tid 140556376606464] Internal Server Error: /horizon/auth/login/
[Tue Feb 07 09:28:15.898327 2017] [wsgi:error] [pid 18605:tid 140556376606464] Traceback (most recent call last):
[Tue Feb 07 09:28:15.898331 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 132, in get_response
[Tue Feb 07 09:28:15.898334 2017] [wsgi:error] [pid 18605:tid 140556376606464]     response = wrapped_callback(request, *callback_args, **callback_kwargs)
[Tue Feb 07 09:28:15.898338 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/views/decorators/debug.py", line 76, in sensitive_post_parameters_wrapper
[Tue Feb 07 09:28:15.898341 2017] [wsgi:error] [pid 18605:tid 140556376606464]     return view(request, *args, **kwargs)
[Tue Feb 07 09:28:15.898344 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/utils/decorators.py", line 110, in _wrapped_view
[Tue Feb 07 09:28:15.898347 2017] [wsgi:error] [pid 18605:tid 140556376606464]     response = view_func(request, *args, **kwargs)
[Tue Feb 07 09:28:15.898350 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/views/decorators/cache.py", line 57, in _wrapped_view_func
[Tue Feb 07 09:28:15.898354 2017] [wsgi:error] [pid 18605:tid 140556376606464]     response = view_func(request, *args, **kwargs)
[Tue Feb 07 09:28:15.898357 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/openstack_auth/views.py", line 111, in login
[Tue Feb 07 09:28:15.898360 2017] [wsgi:error] [pid 18605:tid 140556376606464]     **kwargs)
[Tue Feb 07 09:28:15.898363 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/views/decorators/debug.py", line 76, in sensitive_post_parameters_wrapper
[Tue Feb 07 09:28:15.898367 2017] [wsgi:error] [pid 18605:tid 140556376606464]     return view(request, *args, **kwargs)
[Tue Feb 07 09:28:15.898370 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/utils/decorators.py", line 110, in _wrapped_view
[Tue Feb 07 09:28:15.898373 2017] [wsgi:error] [pid 18605:tid 140556376606464]     response = view_func(request, *args, **kwargs)
[Tue Feb 07 09:28:15.898376 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/views/decorators/cache.py", line 57, in _wrapped_view_func
[Tue Feb 07 09:28:15.898379 2017] [wsgi:error] [pid 18605:tid 140556376606464]     response = view_func(request, *args, **kwargs)
[Tue Feb 07 09:28:15.898382 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/contrib/auth/views.py", line 51, in login
[Tue Feb 07 09:28:15.898385 2017] [wsgi:error] [pid 18605:tid 140556376606464]     auth_login(request, form.get_user())
[Tue Feb 07 09:28:15.898389 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/contrib/auth/__init__.py", line 110, in login
[Tue Feb 07 09:28:15.898392 2017] [wsgi:error] [pid 18605:tid 140556376606464]     request.session.cycle_key()
[Tue Feb 07 09:28:15.898395 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/contrib/sessions/backends/base.py", line 285, in cycle_key
[Tue Feb 07 09:28:15.898398 2017] [wsgi:error] [pid 18605:tid 140556376606464]     self.create()
[Tue Feb 07 09:28:15.898401 2017] [wsgi:error] [pid 18605:tid 140556376606464]   File "/usr/lib/python2.7/dist-packages/django/contrib/sessions/backends/cache.py", line 48, in create
[Tue Feb 07 09:28:15.898404 2017] [wsgi:error] [pid 18605:tid 140556376606464]     "Unable to create a new session key. "
[Tue Feb 07 09:28:15.898407 2017] [wsgi:error] [pid 18605:tid 140556376606464] RuntimeError: Unable to create a new session key. It is likely that the cache is unavailable.


# service apache2 restart
# service memcached restart

https://github.com/AJNOURI/COA/issues/17

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