[LU-6713] Noisy error messages on client while creating DNE filesystem

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 2.7.0, Lustre 2.8.0
• Severity: 3
• Assignee: Di Wang
• Reporter: Robert Read

Description

Seen on Lustre 2.7.0.

While create a 128 MDT filesystem, I noticed that clients sometimes take a long time to connect to new MDTs after they've been added. I saw a lot of these messages on a client's console:

Jun 12 00:08:13 client00 kernel: LustreError: 1275:0:(fld_request.c:170:fld_client_add_target()) Skipped 12 previous similar messages
Jun 12 00:08:13 client00 kernel: Lustre: 1275:0:(lmv_obd.c:300:lmv_init_ea_size()) scratch-clilmv-ffff880772a0ec00: NULL export for 11
Jun 12 00:08:13 client00 kernel: Lustre: 1275:0:(lmv_obd.c:300:lmv_init_ea_size()) Skipped 462 previous similar messages
Jun 12 00:08:19 client00 kernel: LustreError: 1277:0:(fld_request.c:170:fld_client_add_target()) cli-scratch-clilmv-ffff880772a0ec00: Attempt to add target scratch-MDT0025-mdc-ffff880772a0ec00 (idx 37) on fly - skip it
Jun 12 00:08:19 client00 kernel: LustreError: 1277:0:(fld_request.c:170:fld_client_add_target()) Skipped 13 previous similar messages
Jun 12 00:08:19 client00 kernel: Lustre: 1277:0:(lmv_obd.c:300:lmv_init_ea_size()) scratch-clilmv-ffff880772a0ec00: NULL export for 12
Jun 12 00:08:19 client00 kernel: Lustre: 1277:0:(lmv_obd.c:300:lmv_init_ea_size()) Skipped 258 previous similar messages
Jun 12 00:08:25 client00 kernel: Lustre: 1278:0:(lmv_obd.c:300:lmv_init_ea_size()) scratch-clilmv-ffff880772a0ec00: NULL export for 13
Jun 12 00:08:25 client00 kernel: Lustre: 1278:0:(lmv_obd.c:300:lmv_init_ea_size()) Skipped 56 previous similar messages
Jun 12 00:08:25 client00 kernel: LustreError: 1278:0:(fld_request.c:170:fld_client_add_target()) cli-scratch-clilmv-ffff880772a0ec00: Attempt to add target scratch-MDT0027-mdc-ffff880772a0ec00 (idx 39) on fly - skip it
Jun 12 00:08:25 client00 kernel: LustreError: 1278:0:(fld_request.c:170:fld_client_add_target()) Skipped 8 previous similar messages

Eventually the client did connect to all the MDTs, but took about ~20 minutes.