[lustre-discuss] network error on bulk WRITE/bad log
Horn, Chris
chris.horn at hpe.com
Wed Aug 17 07:28:11 PDT 2022
[66494.575431] LNetError: 20017:0:(o2iblnd.c:1880:kiblnd_fmr_pool_map()) Failed to map mr 1/8 elements
[66494.575446] LNetError: 20017:0:(o2iblnd_cb.c:613:kiblnd_fmr_map_tx()) Can't map 32768 bytes (8/8)s: -22
These errors originate from a call to ib_map_mr_sg() which is part of the kernel verbs API.
n = ib_map_mr_sg(mr, tx->tx_frags,
rd->rd_nfrags, NULL, PAGE_SIZE);
if (unlikely(n != rd->rd_nfrags)) {
CERROR("Failed to map mr %d/%d elements\n",
n, rd->rd_nfrags);
return n < 0 ? n : -EINVAL;
}
Your errors mean that we wanted to map 8 fragments to the memory region, but we were only able to map one of them.
As a first step, I would recommend ensuring that you have the latest firmware for your network cards, and if you’re using an external driver distribution (like mlnx-ofa_kernel) then upgrade to the latest version. There could be some bug in the o2iblnd driver code but it is best to first rule out any issue with firmware/drivers.
Chris Horn
From: lustre-discuss <lustre-discuss-bounces at lists.lustre.org> on behalf of Stepan Nassyr via lustre-discuss <lustre-discuss at lists.lustre.org>
Date: Tuesday, August 16, 2022 at 8:26 AM
To: Peter Jones <pjones at whamcloud.com>, lustre-discuss at lists.lustre.org <lustre-discuss at lists.lustre.org>
Subject: Re: [lustre-discuss] network error on bulk WRITE/bad log
Hello Peter,
Thank you for the reply. I have upgraded lustre to 2.15.1 . The errors persist, however - now I am also seeing a new error on io02:
[ 1749.396942] LustreError: 9216:0:(mdt_handler.c:7499:mdt_iocontrol()) storage-MDT0001: Not supported cmd = 1074292357, rc = -95
I'm not entirely sure how to look up the cmd code and rc -95 seems to just be EOPNOTSUPP, so no additional information here.
Is there a way to look up what the cmd value means?
On 15.08.22 14:50, Peter Jones wrote:
Stepan
2.14.56 is not a version of Lustre – it is an interim dev build. Even if it does not resolve this specific issue, I would strongly recommend switching to the recently released Lustre 2.15.1 release
Peter
From: lustre-discuss <lustre-discuss-bounces at lists.lustre.org><mailto:lustre-discuss-bounces at lists.lustre.org> on behalf of Stepan Nassyr via lustre-discuss <lustre-discuss at lists.lustre.org><mailto:lustre-discuss at lists.lustre.org>
Reply-To: Stepan Nassyr <s.nassyr at fz-juelich.de><mailto:s.nassyr at fz-juelich.de>
Date: Monday, August 15, 2022 at 1:35 AM
To: "lustre-discuss at lists.lustre.org"<mailto:lustre-discuss at lists.lustre.org> <lustre-discuss at lists.lustre.org><mailto:lustre-discuss at lists.lustre.org>
Subject: [lustre-discuss] network error on bulk WRITE/bad log
Hi all,
In May I had a failure on a small cluster and asked here (http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/2022-May/018073.html<http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/2022-May/018073.html>). Due to time constraints I just recreated the filesystem back then.
Now the failure happened again, this time I have more time and can investigate and haven't done anything destructive yet.
I use the following versions:
1. lustre 2.14.56
2. zfs 2.0.7 (previously used 2.1.2, but got told that 2.1.x is not tested well with lustre)
3. Nodes are running Rocky Linux 8.6
4. uname -r: 4.18.0-372.19.1.el8_6.aarch64
There are 2 IO nodes (io01 and io02), both of them are MDS and OSS and one of them is MGS. Here are the devices:
[snassyr at io02 ~]$ sudo lctl dl
0 UP osd-zfs storage-MDT0001-osd storage-MDT0001-osd_UUID 8
1 UP mgc MGC10.31.7.61 at o2ib a087e05e-d57c-4561-ad75-6827d4428f54 4
2 UP mds MDS MDS_uuid 2
3 UP lod storage-MDT0001-mdtlov storage-MDT0001-mdtlov_UUID 3
4 UP mdt storage-MDT0001 storage-MDT0001_UUID 8
5 UP mdd storage-MDD0001 storage-MDD0001_UUID 3
6 UP osp storage-MDT0000-osp-MDT0001 storage-MDT0001-mdtlov_UUID 4
7 UP osp storage-OST0000-osc-MDT0001 storage-MDT0001-mdtlov_UUID 4
8 UP osp storage-OST0001-osc-MDT0001 storage-MDT0001-mdtlov_UUID 4
9 UP lwp storage-MDT0000-lwp-MDT0001 storage-MDT0000-lwp-MDT0001_UUID 4
10 UP osd-zfs storage-OST0001-osd storage-OST0001-osd_UUID 4
11 UP ost OSS OSS_uuid 2
12 UP obdfilter storage-OST0001 storage-OST0001_UUID 6
13 UP lwp storage-MDT0000-lwp-OST0001 storage-MDT0000-lwp-OST0001_UUID 4
14 UP lwp storage-MDT0001-lwp-OST0001 storage-MDT0001-lwp-OST0001_UUID 4
[snassyr at io01 ~]$ sudo lctl dl
0 UP osd-zfs MGS-osd MGS-osd_UUID 4
1 UP mgs MGS MGS 6
2 UP mgc MGC10.31.7.61 at o2ib 9f351a51-0232-4306-a66d-cecee8629329 4
3 UP osd-zfs storage-MDT0000-osd storage-MDT0000-osd_UUID 9
4 UP mds MDS MDS_uuid 2
5 UP lod storage-MDT0000-mdtlov storage-MDT0000-mdtlov_UUID 3
6 UP mdt storage-MDT0000 storage-MDT0000_UUID 12
7 UP mdd storage-MDD0000 storage-MDD0000_UUID 3
8 UP qmt storage-QMT0000 storage-QMT0000_UUID 3
9 UP osp storage-MDT0001-osp-MDT0000 storage-MDT0000-mdtlov_UUID 4
10 UP osp storage-OST0000-osc-MDT0000 storage-MDT0000-mdtlov_UUID 4
11 UP osp storage-OST0001-osc-MDT0000 storage-MDT0000-mdtlov_UUID 4
12 UP lwp storage-MDT0000-lwp-MDT0000 storage-MDT0000-lwp-MDT0000_UUID 4
13 UP osd-zfs storage-OST0000-osd storage-OST0000-osd_UUID 4
14 UP ost OSS OSS_uuid 2
15 UP obdfilter storage-OST0000 storage-OST0000_UUID 6
16 UP lwp storage-MDT0000-lwp-OST0000 storage-MDT0000-lwp-OST0000_UUID 4
17 UP lwp storage-MDT0001-lwp-OST0000 storage-MDT0001-lwp-OST0000_UUID 4
On io01 I see repeating errors mentioning a network error:
[65922.582578] LustreError: 20017:0:(ldlm_lib.c:3540:target_bulk_io()) Skipped 11 previous similar messages
[66494.575431] LNetError: 20017:0:(o2iblnd.c:1880:kiblnd_fmr_pool_map()) Failed to map mr 1/8 elements
[66494.575442] LNetError: 20017:0:(o2iblnd.c:1880:kiblnd_fmr_pool_map()) Skipped 11 previous similar messages
[66494.575446] LNetError: 20017:0:(o2iblnd_cb.c:613:kiblnd_fmr_map_tx()) Can't map 32768 bytes (8/8)s: -22
[66494.575448] LNetError: 20017:0:(o2iblnd_cb.c:613:kiblnd_fmr_map_tx()) Skipped 11 previous similar messages
[66494.575452] LNetError: 20017:0:(o2iblnd_cb.c:1725:kiblnd_send()) Can't setup PUT src for 10.31.7.62 at o2ib: -22
[66494.575454] LNetError: 20017:0:(o2iblnd_cb.c:1725:kiblnd_send()) Skipped 11 previous similar messages
[66494.575458] LustreError: 20017:0:(events.c:477:server_bulk_callback()) event type 5, status -5, desc 00000000cdd4e797
[66494.575460] LustreError: 20017:0:(events.c:477:server_bulk_callback()) Skipped 11 previous similar messages
[66546.574314] LustreError: 20017:0:(ldlm_lib.c:3540:target_bulk_io()) @@@ network error on bulk WRITE req at 0000000070b8f1ab x1740960836990720/t0(0) o1000->storage-MDT0001-mdtlov_UUID at 10.31.7.62@o2ib:522/0<mailto:storage-MDT0001-mdtlov_UUID at 10.31.7.62@o2ib:522/0> lens 336/33016 e 0 to 0 dl 1660376137 ref 1 fl Interpret:/0/0 rc 0/0 job:''
On io02 I see repeating errors mentioning a bad log:
[66582.856444] LustreError: 14905:0:(llog_osd.c:264:llog_osd_read_header()) storage-MDT0000-osp-MDT0001: bad log [0x200000401:0x1:0x0] header magic: 0x0 (expected 0x10645539)
[66582.856450] LustreError: 14905:0:(llog_osd.c:264:llog_osd_read_header()) Skipped 11 previous similar messages
I can't make sense of these error messages. How can I recover?
(I have the full dmesg/lctl dk log, but they are too big to attach, is it ok to upload them somewhere and put a link in a reply?)
Thank you and best regards,
Stepan
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