Keystone reports "Can't instantiate abstract class Identity with abstract methods reset_last_active" error after an overcloud deploy

Solution Verified - Updated -

Issue

After a fresh platform deployment, a minor update or an overcloud deploy to apply some config changes or to scale up with new nodes, overcloud access is lost and following error is reported:

Can't instantiate abstract class Identity with abstract methods reset_last_active (HTTP 400)

Environment

  • Red Hat Openstack Platform (RHOSP) 16.2.6

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