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Date:      Tue, 29 Jan 2019 08:55:19 -0800
From:      Enji Cooper <yaneurabeya@gmail.com>
To:        Kyle Evans <kevans@freebsd.org>
Cc:        src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r343543 - head/sbin/bectl/tests
Message-ID:  <5687EE07-74FB-4233-B51D-C8948641E8CB@gmail.com>
In-Reply-To: <CACNAnaH5Qnfzenkwe1obM0DOfUZbvTjWg79o7FAobPrT6WYcaA@mail.gmail.com>
References:  <201901290408.x0T48oJQ080243@repo.freebsd.org> <CACNAnaEmeQLwB%2Ba8KWyqB3GFWDn7on4gYtDrH7i5G6mj3zfSJw@mail.gmail.com> <674E01AB-49C7-4B40-B2FD-6EB4AFEAB1FD@gmail.com> <CACNAnaH5Qnfzenkwe1obM0DOfUZbvTjWg79o7FAobPrT6WYcaA@mail.gmail.com>

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> On Jan 29, 2019, at 08:39, Kyle Evans <kevans@freebsd.org> wrote:
>=20
>> On Tue, Jan 29, 2019 at 10:32 AM Enji Cooper <yaneurabeya@gmail.com> wrot=
e:
>>=20
>>=20
>>>> On Jan 28, 2019, at 20:10, Kyle Evans <kevans@freebsd.org> wrote:
>>>>=20
>>>> On Mon, Jan 28, 2019 at 10:09 PM Kyle Evans <kevans@freebsd.org> wrote:=

>>>>=20
>>>> Author: kevans
>>>> Date: Tue Jan 29 04:08:49 2019
>>>> New Revision: 343543
>>>> URL: https://svnweb.freebsd.org/changeset/base/343543
>>>>=20
>>>> Log:
>>>> bectl(8) test: Force destroy the zpool in cleanup
>>>>=20
>>>> This is a wild guess as to why bectl tests failed once upon a time in C=
I,
>>>> given no apparent way to see a transcript of cleanup routines with Kyua=
. The
>>>> bectl tests construct a new, clean zpool for every test. The failure
>>>> indicated was because of a mount that was leftover from a previous test=
, but
>>>> the previous test had succeeded so it's not clear how the mount remaine=
d
>>>> leftover unless the `zpool get health ${pool}` had somehow failed.
>>>>=20
>>>=20
>>> I left out: the tests are supposed to be constructed to clean up any
>>> mounts that were left over in the course of the test, hence the
>>> assumption that the failure lies in the cleanup.
>>=20
>> Hi Kyle,
>>=20
>> The tests use a deterministic zpool name defined locally (not globally), a=
nd will only destroy the zpool if =E2=80=9Czpool get health=E2=80=9D succeed=
s.
>>=20
>> The tests will work the first time (when the zpool doesn=E2=80=99t exist)=
, but I believe they=E2=80=99re actually introducing nondeterminism by accid=
ent. I will propose a fix for this.
>>=20
>> There=E2=80=99s a way to decipher why things failed from /var/log/message=
s and kyua output. It=E2=80=99s just nontrivial to those who don=E2=80=99t k=
now what to look for. Can you please provide a failing ci run?
>>=20
>=20
> Hi,
>=20
> Thanks! Any help is appreciated -- my inquiry to -testing@ in response
> to the weekly report where the failing test [1] was mentioned has been
> met with silence. The failure is consistent in the i386-test job, but
> amd64-test sees nothing of the sort (and neither does my local
> testing).

Thanks for the reminder to rejoin that list.

> [1] https://ci.freebsd.org/job/FreeBSD-stable-12-i386-test/426/testReport/=
sbin.bectl/bectl_test/bectl_mount/

It=E2=80=99s pretty obvious from the above run what=E2=80=99s going on from t=
he output. A similarly named zpool (same prefix; suffixed with a 2) is being=
 matched by grep, even though the test sets up one with a suffix in the prec=
eding steps.

It=E2=80=99s probably and issue with timing and the bhyve implementation for=
 amd64 vs i386, or something else.

Cheers,
-Enji=



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