I just discovered a bug that¹s probably been around a long time but hidden by exception suppression. https://bugs.launchpad.net/congress/+bug/1563495 When an auth attempt fails due to token expiry, Congress Glance driver obtains a new token from keystone and sets it in Glance client, but for some reason, Glance client continues to use the expired token and fails to authenticate. Glance data stops flowing to Congress. It might explain the issue Bryan Sullivan ran into (http://lists.openstack.org/pipermail/openstack-dev/2016-February/087364.ht ml). I haven¹t been able to nail down whether it¹s a Congress datasource driver issue or a Glance client issue. A few more eyes on it would be great. Thanks!