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---
deprecations:
- |
We no longer recommend using the eventlet unsafe keystonemiddleware's
memcacheclientpool. This implementation may result in growing connections
to memcached.
It is recommended that the ``memcache_use_advanced_pool`` option
is set to ``True`` in the ``keystone_authtoken`` configuration section of
the various services (e.g. nova, glance, ...) when memcached is used for
token cache.
upgrade:
- |
[`bug 1892852 <https://bugs.launchpad.net/keystonemiddleware/+bug/1892852>`_]
[`bug 1888394 <https://bugs.launchpad.net/oslo.cache/+bug/1888394>`_]
[`bug 1883659 <https://bugs.launchpad.net/keystonemiddleware/+bug/1883659>`_]
Keystonemiddleware now using eventlet-safe implementation of
``MemcacheClientPool`` from oslo.cache's library by default.
The ``keystonemiddleware`` implementation is now deprecated. For backwards
compatibility, the ``[keystone_authtoken] memcache_use_advanced_pool``
option can be set to ``False`` config files of the various services (e.g.
nova, glance, ...) when memcached is used for token cache.
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