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[Daniel Bengtsson <1590779@xxxxxxxxxxxxxxxxxx>]

It seems the issue has been fixed in keystone. I close that one, feel
free to reopen it if I'm wrong.

** Changed in: oslo.cache
       Status: Confirmed => Won't Fix

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https://bugs.launchpad.net/bugs/1590779

Title:
  Cache region invalidation works for local CacheRegion object only

Status in OpenStack Identity (keystone):
  Fix Released
Status in oslo.cache:
  Won't Fix

Bug description:
  oslo_cache uses dogpile.cache's CacheRegion
  which invalidates by setting region object attributes:
  - self._hard_invalidated
  - self._soft_invalidated
  Then it checks these attributes on value get.
  So this invalidation works for particular region object only.

  If there is a need to invalidate a region so that values in it are no
  more valid for other instances of CacheRegion (either in the same
  process or in another one) - it's simply impossible.

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