sanityn test_104 fails for clients with Lustre versions that are newer than the client version starting with Lustre 2.12.3 servers and 184.108.40.206 clients starting on 24 OCT 2019; see https://testing.whamcloud.com/test_sets/591b7932-f793-11e9-a197-52540065bddc and https://testing.whamcloud.com/test_sets/d58f7e54-f767-11e9-add9-52540065bddc.
Looking at a recent failure, https://testing.whamcloud.com/test_sets/8d9bdf58-4333-11ea-86c7-52540065bddc, for Lustre servers 2.11.0 and clients 220.127.116.11, we see the mtimes produced
sanityn test 104 does not have a Lustre version check, but needs one. Master, future 2.14.0, interop testing runs with 2.12.3 and 2.13.0. 2.13.0 already has this patch and 2.12.4 has this patch. So, when we move interop testing for master to use 2.12.4, we don’t have to worry about master interop testing hitting this issue. The only other release we need to worry about is the LTS branch b2_12. The 2.12 branch runs interop testing with 2.11.0 and 2.10.8. Thus, if we land a patch to b2_12 that checks the server version to make sure it is 18.104.22.168 or later, then all b2_12 interop testing should skip this test when appropriate.