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[OpenStack Infra <1590779@xxxxxxxxxxxxxxxxxx>]

** Changed in: keystone
       Status: Invalid => In Progress

** Changed in: keystone
     Assignee: (unassigned) => David Stanek (dstanek)

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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):
  In Progress
Status in oslo.cache:
  In Progress

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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