Hi Telemetry Team, In the last couple of months the periodic-stable job errors (and thus the mails on openstack-stable-maint mailing list [1], where mails are sent from every failing jobs) increased significantly. I've talked with the infra team as the mail traffic is quite visible for them as well. I've collected the recent failures with examples that are failing constantly. Please take a look at them and try to fix them wherever it is possible. Since the old branches seem quite abandoned in some cases, they might need maintainers to step up to keep those gates healthy, or in case there are no maintainers, then it might worth to think of transitioning those broken old branches to End of Life. :/ And the list (with possible root causes): * tenacity should be constrained for py27:     ceilometer: pike - openstack-tox-py27 -- https://zuul.opendev.org/t/openstack/build/4bcb7e71d507465ea799cd289e6cc920     ceilometer: queens - openstack-tox-py27 -- https://zuul.opendev.org/t/openstack/build/583d52b6096745ddbb18da23cf79fa75     ceilometer: rocky - openstack-tox-py27 -- https://zuul.opendev.org/t/openstack/build/03279061fddd4d14819c04feda3a1806 * kombu version should be constrained for py27:     ceilometer: stein - openstack-tox-py27 -- https://zuul.opendev.org/t/openstack/build/219139b1814b4fd591ee7dc199f2e3da [1] http://lists.openstack.org/pipermail/openstack-stable-maint/2021-July/thread... Thanks, Előd