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<p>Hi all,</p>
<p>In May I had a failure on a small cluster and asked here (<a class="moz-txt-link-freetext" href="http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/2022-May/018073.html" moz-do-not-send="true">http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/2022-May/018073.html</a>).
Due to time constraints I just recreated the filesystem back then. <br>
</p>
<p>Now the failure happened again, this time I have more time and can investigate and haven't done anything destructive yet.<br>
</p>
<p>I use the following versions:</p>
<ul>
<li>lustre 2.14.56 </li><li>zfs 2.0.7 (previously used 2.1.2, but got told that 2.1.x is not tested well with lustre)
</li><li>Nodes are running Rocky Linux 8.6<br>
</li><li>uname -r: 4.18.0-372.19.1.el8_6.aarch64<br>
</li></ul>
<p>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:</p>
<p><font face="monospace">[snassyr@io02 ~]$ sudo lctl dl<br>
0 UP osd-zfs storage-MDT0001-osd storage-MDT0001-osd_UUID 8<br>
1 UP mgc MGC10.31.7.61@o2ib a087e05e-d57c-4561-ad75-6827d4428f54 4<br>
2 UP mds MDS MDS_uuid 2<br>
3 UP lod storage-MDT0001-mdtlov storage-MDT0001-mdtlov_UUID 3<br>
4 UP mdt storage-MDT0001 storage-MDT0001_UUID 8<br>
5 UP mdd storage-MDD0001 storage-MDD0001_UUID 3<br>
6 UP osp storage-MDT0000-osp-MDT0001 storage-MDT0001-mdtlov_UUID 4<br>
7 UP osp storage-OST0000-osc-MDT0001 storage-MDT0001-mdtlov_UUID 4<br>
8 UP osp storage-OST0001-osc-MDT0001 storage-MDT0001-mdtlov_UUID 4<br>
9 UP lwp storage-MDT0000-lwp-MDT0001 storage-MDT0000-lwp-MDT0001_UUID 4<br>
10 UP osd-zfs storage-OST0001-osd storage-OST0001-osd_UUID 4<br>
11 UP ost OSS OSS_uuid 2<br>
12 UP obdfilter storage-OST0001 storage-OST0001_UUID 6<br>
13 UP lwp storage-MDT0000-lwp-OST0001 storage-MDT0000-lwp-OST0001_UUID 4<br>
14 UP lwp storage-MDT0001-lwp-OST0001 storage-MDT0001-lwp-OST0001_UUID 4</font><br>
</p>
<p><font face="monospace">[snassyr@io01 ~]$ sudo lctl dl<br>
0 UP osd-zfs MGS-osd MGS-osd_UUID 4<br>
1 UP mgs MGS MGS 6<br>
2 UP mgc MGC10.31.7.61@o2ib 9f351a51-0232-4306-a66d-cecee8629329 4<br>
3 UP osd-zfs storage-MDT0000-osd storage-MDT0000-osd_UUID 9<br>
4 UP mds MDS MDS_uuid 2<br>
5 UP lod storage-MDT0000-mdtlov storage-MDT0000-mdtlov_UUID 3<br>
6 UP mdt storage-MDT0000 storage-MDT0000_UUID 12<br>
7 UP mdd storage-MDD0000 storage-MDD0000_UUID 3<br>
8 UP qmt storage-QMT0000 storage-QMT0000_UUID 3<br>
9 UP osp storage-MDT0001-osp-MDT0000 storage-MDT0000-mdtlov_UUID 4<br>
10 UP osp storage-OST0000-osc-MDT0000 storage-MDT0000-mdtlov_UUID 4<br>
11 UP osp storage-OST0001-osc-MDT0000 storage-MDT0000-mdtlov_UUID 4<br>
12 UP lwp storage-MDT0000-lwp-MDT0000 storage-MDT0000-lwp-MDT0000_UUID 4<br>
13 UP osd-zfs storage-OST0000-osd storage-OST0000-osd_UUID 4<br>
14 UP ost OSS OSS_uuid 2<br>
15 UP obdfilter storage-OST0000 storage-OST0000_UUID 6<br>
16 UP lwp storage-MDT0000-lwp-OST0000 storage-MDT0000-lwp-OST0000_UUID 4<br>
17 UP lwp storage-MDT0001-lwp-OST0000 storage-MDT0001-lwp-OST0000_UUID 4</font><br>
</p>
<p>On io01 I see repeating errors mentioning a network error:</p>
<p><font face="monospace">[65922.582578] LustreError: 20017:0:(ldlm_lib.c:3540:target_bulk_io()) Skipped 11 previous similar messages<br>
[66494.575431] LNetError: 20017:0:(o2iblnd.c:1880:kiblnd_fmr_pool_map()) Failed to map mr 1/8 elements<br>
[66494.575442] LNetError: 20017:0:(o2iblnd.c:1880:kiblnd_fmr_pool_map()) Skipped 11 previous similar messages<br>
[66494.575446] LNetError: 20017:0:(o2iblnd_cb.c:613:kiblnd_fmr_map_tx()) Can't map 32768 bytes (8/8)s: -22<br>
[66494.575448] LNetError: 20017:0:(o2iblnd_cb.c:613:kiblnd_fmr_map_tx()) Skipped 11 previous similar messages<br>
[66494.575452] LNetError: 20017:0:(o2iblnd_cb.c:1725:kiblnd_send()) Can't setup PUT src for 10.31.7.62@o2ib: -22<br>
[66494.575454] LNetError: 20017:0:(o2iblnd_cb.c:1725:kiblnd_send()) Skipped 11 previous similar messages<br>
[66494.575458] LustreError: 20017:0:(events.c:477:server_bulk_callback()) event type 5, status -5, desc 00000000cdd4e797<br>
[66494.575460] LustreError: 20017:0:(events.c:477:server_bulk_callback()) Skipped 11 previous similar messages<br>
[66546.574314] LustreError: 20017:0:(ldlm_lib.c:3540:target_bulk_io()) @@@ network error on bulk WRITE req@0000000070b8f1ab x1740960836990720/t0(0) o1000-><a class="moz-txt-link-abbreviated
moz-txt-link-freetext" href="mailto:storage-MDT0001-mdtlov_UUID@10.31.7.62@o2ib:522/0" moz-do-not-send="true">storage-MDT0001-mdtlov_UUID@10.31.7.62@o2ib:522/0</a>
lens 336/33016 e 0 to 0 dl 1660376137 ref 1 fl Interpret:/0/0 rc 0/0 job:''</font><br>
</p>
<p>On io02 I see repeating errors mentioning a bad log:</p>
<p><font face="monospace">[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)<br>
[66582.856450] LustreError: 14905:0:(llog_osd.c:264:llog_osd_read_header()) Skipped 11 previous similar messages</font><br>
</p>
<p>I can't make sense of these error messages. How can I recover?</p>
<p>(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?)<br>
</p>
<p>Thank you and best regards,<br>
Stepan<br>
</p>
<p><br>
</p>
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