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[Dolph Mathews <1253054@xxxxxxxxxxxxxxxxxx>]

I'm not able to reproduce on master, and unfortunately folsom is now
unsupported. If this is reproducible on grizzly or havana, perhaps
there's something we can backport. That said, I suspect this issue
actually exists in the version of the python memcache client -- perhaps
it can be updated to something > 1.50? My attempt to reproduce with
python-memcached 1.53:

    >>> import memcache
    >>> c = memcache.Client(['127.0.0.1:11211'])
    >>> c.set('foo', 'bar')
    True
    >>> c.get('foo')
    'bar'
    >>> memcache.__version__
    '1.53'


** Changed in: keystone
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1253054

Title:
  keystone auth token caching throws error in memcache

Status in OpenStack Identity (Keystone):
  Invalid

Bug description:
  I tried to use the auth_token caching to improve the performance of
  the response rather than checking with keystone every time.

  I am using the folsom keystone version and added the config in
  auth_token filter

  If i add memcached_servers = 10.11.12.13:11211 then auth_token

  try:
                  import memcache
                  import iso8601
                  LOG.info('Using memcache for caching token')
                  self._cache = memcache.Client(memcache_servers.split(','))
                  self._iso8601 = iso8601
              except ImportError as e:
                  LOG.warn('disabled caching due to missing libraries %s', e)

  Above memcache.client can't establish the connection along with port,
  it goes the except part. It works only with just ip address.

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