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Date:      Tue, 30 Mar 2021 19:01:01 +0300
From:      Christos Chatzaras <chris@cretaforce.gr>
To:        "Jonathan T. Looney" <jtl@freebsd.org>
Cc:        FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>, "gjb@freebsd.org" <gjb@freebsd.org>, Konstantin Belousov <kib@freebsd.org>
Subject:   Re: FreeBSD 13.0-RC4 and Nginx process "stuck" during restart
Message-ID:  <FE63E502-91D3-4F5E-AA0D-0038DE66E764@cretaforce.gr>
In-Reply-To: <CADrOrmvXn7BcCU58ojVfM18wUg2raa8X9C=KQUrZrXVHjHE5fg@mail.gmail.com>
References:  <94CCFC59-B381-40B1-8F85-F86D87A16B53@cretaforce.gr> <CADrOrmvXn7BcCU58ojVfM18wUg2raa8X9C=KQUrZrXVHjHE5fg@mail.gmail.com>

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> On 30 Mar 2021, at 18:40, Jonathan T. Looney <jtl@freebsd.org> wrote:
>=20
> Yes, it could be related. Because of the timing of when we first saw =
the behavior, I assumed the trigger for the behavior (which remains =
unknown) only existed in main. However, it is possible that this =
behavior is now being triggered in 13.0.
>=20
> Are you able to reliably reproduce this? I was never able to do that. =
A reliable reproduction may help narrow down the change which triggered =
this behavior.
>=20
> I can certainly MFC the patch to stable/13. re@ will need to decide =
whether to admit it to the release branch.
>=20
> Jonathan

Hello Jonathan,

I have 100+ nginx servers and I can reproduce it in many of them. It =
doesn't happen always in the same servers. Also after a "killlall -9 =
nginx && service nginx restart"  a second "service nginx restart" few =
seconds after the first restart completes successfully. I believe it =
needs few minutes/hours running nginx before the restart "stuck" in =
"Waiting for PIDS: 85499."

Did you notice it with nginx too or something else? I also run monit, =
bind, dovecot, postfix, mysql, php-fpm and pure-ftpd and didn't notice =
any restart of these services to "stuck".=



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