Comment 6 for bug 1653483

After a read through the Ceph source code around support for Keystone v3, it appears that token revocation fetching is only designed to work when using PKI tokens.

According to HPE here: https://docs.hpcloud.com/hos-3.x/helion/releasenotes30.html "The below error encountered (periodically) in Rados Gateway logs can be safely ignored and does not require any corrective action.
ERROR: keystone revocation processing returned error r=-22"