[lustre-discuss] 2.10.1 client fails to mount on 2.9 backend

[Christopher Johnston]

Yes the MGS is a TCP based setup (not IB), if I recall 'ltcl ping' looked
OK but I can test that later this morning and provide feedback.

On Fri, Nov 17, 2017 at 4:48 PM Chris Horn <hornc at cray.com> wrote:

> Is the MGS actually on tcp or is it on o2ib? Can you “lctl ping” the MGS
> LNet nid from the client where you’re trying to mount?
>
>
>
> Chris Horn
>
>
>
> *From: *lustre-discuss <lustre-discuss-bounces at lists.lustre.org> on
> behalf of Christopher Johnston <chjohnst at gmail.com>
> *Date: *Friday, November 17, 2017 at 3:17 PM
> *To: *lustre-discuss <lustre-discuss at lists.lustre.org>
> *Subject: *[lustre-discuss] 2.10.1 client fails to mount on 2.9 backend
>
>
>
> Just tested the new 2.10.1 client against one of my fileservers where I
> have 2.9 running.   Works with 2.10.0 but not 2.10.1, is this expected?
>
>
>
> # mount -t lustre 172.30.69.90:/qstore /mnt
>
> mount.lustre: mount 172.30.69.90:/qstore at /mnt failed: No such file or
> directory
>
> Is the MGS specification correct?
>
> Is the filesystem name correct?
>
> If upgrading, is the copied client log valid? (see upgrade docs)
>
>
>
> # dmesg -e | tail -4
>
> [Nov17 16:15] LustreError: 22344:0:(ldlm_lib.c:483:client_obd_setup())
> can't add initial connection
>
> [  +0.009423] LustreError: 22344:0:(obd_config.c:608:class_setup()) setup
> MGC172.30.69.90 at tcp failed (-2)
>
> [  +0.009755] LustreError: 22344:0:(obd_mount.c:203:lustre_start_simple())
> MGC172.30.69.90 at tcp setup error -2
>
> [  +0.010193] LustreError: 22344:0:(obd_mount.c:1505:lustre_fill_super())
> Unable to mount  (-2)
>
>
>
> -Chris
>
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