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[Adam Young <1291423@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

There is a noticable lag when doing multiple calls to Keystone.  The
server shows in the log:

 KVS lock acquired for: os-revoke-events acquire
/opt/stack/keystone/keystone/common/kvs/core.py:375

Putting the following delay in mitigates it significantly

        delta = datetime.timedelta(seconds=1)
        if self._last_fetch and self._last_fetch > timeutils.utcnow() + delta:
            return

** Affects: keystone
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1291423

Title:
  revocation events sync slows responses to all authenticated calls

Status in OpenStack Identity (Keystone):
  New

Bug description:
  There is a noticable lag when doing multiple calls to Keystone.  The
  server shows in the log:

   KVS lock acquired for: os-revoke-events acquire
  /opt/stack/keystone/keystone/common/kvs/core.py:375

  Putting the following delay in mitigates it significantly

          delta = datetime.timedelta(seconds=1)
          if self._last_fetch and self._last_fetch > timeutils.utcnow() + delta:
              return

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