Backport #39237
Updated by Kefu Chai about 5 years ago
https://github.com/ceph/ceph/pull/27476 see http://pulpito.ceph.com/yuriw-2019-04-09_19:20:36-multimds-wip-yuri3-testing-2019-04-08-2038-mimic-testing-basic-smithi/ this happens after https://github.com/ceph/ceph-build/pull/1283