+++ This bug was initially created as a clone of Bug #1300398 +++

Description of problem:
Horizon fails to load in IPv6 deployment:
 mod_wsgi (pid=7160): Exception occurred processing WSGI script '/usr/share/openstack-dashboard/openstack_dashboard/wsgi/django.wsgi'.
 Traceback (most recent call last):
   File "/usr/lib/python2.7/site-packages/django/http/response.py", line 309, in close
     signals.request_finished.send(sender=self._handler_class)
   File "/usr/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 201, in send
     response = receiver(signal=self, sender=sender, **named)
   File "/usr/lib/python2.7/site-packages/django/core/cache/__init__.py", line 156, in close_caches
     cache.close()
   File "/usr/lib/python2.7/site-packages/django/core/cache/backends/memcached.py", line 111, in close
     self._cache.disconnect_all()
   File "/usr/lib/python2.7/site-packages/django/core/cache/backends/memcached.py", line 175, in _cache
     self._client = self._lib.Client(self._servers, pickleProtocol=pickle.HIGHEST_PROTOCOL)
   File "/usr/lib/python2.7/site-packages/memcache.py", line 207, in __init__
     self.set_servers(servers)
   File "/usr/lib/python2.7/site-packages/memcache.py", line 253, in set_servers
     for s in servers]
   File "/usr/lib/python2.7/site-packages/memcache.py", line 1087, in __init__
     raise ValueError('Unable to parse connection string: "%s"' % host)
 ValueError: Unable to parse connection string: "fd00:fd00:fd00:2000:f816:3eff:fe07:286:11211"

This is the cache config in /etc/openstack-dashboard/local_settings:

CACHES = {
    'default': {

#        'BACKEND': 'django.core.cache.backends.locmem.LocMemCache'
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',


        'LOCATION': [ 'fd00:fd00:fd00:2000:f816:3eff:fe07:286:11211','fd00:fd00:fd00:2000:f816:3eff:feac:a861:11211','fd00:fd00:fd00:2000:f816:3eff:fe1b:11d1:11211', ],


    }
}


Version-Release number of selected component (if applicable):
openstack-tripleo-heat-templates-0.8.6-108.el7ost.noarch

--- Additional comment from errata-xmlrpc on 2016-01-20 18:31:10 EST ---

Bug report changed to ON_QA status by Errata System.
A QE request has been submitted for advisory RHBA-2016:22379-01
https://errata.devel.redhat.com/advisory/22379

--- Additional comment from Marius Cornea on 2016-01-21 06:28:40 EST ---

openstack-tripleo-heat-templates-0.8.6-110.el7ost.noarch

--- Additional comment from errata-xmlrpc on 2016-02-18 10:46:03 EST ---

Bug report changed to RELEASE_PENDING status by Errata System.
Advisory RHBA-2016:22379-02 has been changed to PUSH_READY status.
https://errata.devel.redhat.com/advisory/22379

--- Additional comment from errata-xmlrpc on 2016-02-18 11:50:38 EST ---

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0264.html