Date: Tue, 1 Oct 2019 13:09:01 +0200 From: Julien Cigar <julien@perdition.city> To: Reshad Patuck <reshadpatuck1@gmail.com> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: [zfs] filesystem reads hanging Message-ID: <20191001110901.GL49734@home.lan> In-Reply-To: <CADaJeD2JNwdd=_6_Pdp1YUgEdD6f0V%2B5U6bUk%2BoKzx_MmXs0ow@mail.gmail.com> References: <CADaJeD24HV0eW7nQT9jaQwEWp=1f4J2WL3OOLZiv--v1zyepwQ@mail.gmail.com> <20191001082837.GF49734@home.lan> <CADaJeD2JNwdd=_6_Pdp1YUgEdD6f0V%2B5U6bUk%2BoKzx_MmXs0ow@mail.gmail.com>
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--hTKW8p8tUZ/8vLMe Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Oct 01, 2019 at 03:46:40PM +0530, Reshad Patuck wrote: > Hi Julien, Hi Reshad, >=20 > I did come across that one an hour or so back, can you let me know if the= re > is any way to confirm that it is the same issue I am running up against. > The command `procstat -kka` does have very similar (and in some cases > identical) output to the lines in the PR mentioned. >=20 I'm confident that it's the same issue. > Unfortunately I need to stick to 12.0 till 12.1 is out, any idea if I can > merge the same change into 12.0 and compile it? > I can see the changes in the 12.1 branch, just wondering if I should jump > to the beta or wait it out if I cant compile it into 12.0. >=20 I can speak only for myself, but applying https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D202890&action=3Ddiff fixed the issue for me. > Thanks for your help, >=20 > Reshad >=20 cheers, Julien >=20 > On Tue, Oct 1, 2019 at 1:58 PM Julien Cigar <julien@perdition.city> wrote: >=20 > > On Tue, Oct 01, 2019 at 10:26:32AM +0530, Reshad Patuck wrote: > > > Hi, > > > > Hello, > > > > > > > > I have a FreeBSD 12.0-RELEASE-p9 system running ZFS. > > > The system runs an application that uses postgres, and python (among > > other > > > services). > > > > > > I have noticed that python suddenly is not able to connect to postgre= s. > > > When I try to investigate further, certain files on disk can not be r= ead. > > > The commands `cat` and `ls -l` hang (no output and I can not ctrl-c or > > kill > > > -9 them), ps -aux shows them in a D+ state. > > > On killing the SSH session these processes continue running in orphan= s, I > > > am not able to kill them. > > > > > > Someone on IRC suggested running a zfs scrub to check for data > > corruption, > > > but running `zpool scrub zroot` has the same effect. > > > The command does not return, ctrl-c does not kill it and `zpool scrub= -s > > > zroot` says "cannot cancel scrubbing zroot: there is no active scrub". > > > > > > This has happened in the past 1 month to two of my production servers= and > > > since the application was critical they were rebooted and the boxes > > > function as normal after the reboot. > > > Files that were not cat-able on the production servers were working f= ine > > > and a zfs scrub worked fine to show 0 errors and 0 fixes. > > > One of these boxes needed a hard reboot as it got stuck in the shutti= ng > > > down stage of a soft reboot. > > > > > > I am not sure where to start debugging this or if there are any ways = to > > get > > > metrics on a box stuck in this state. > > > Please let me know if you would like me to fetch any metrics or run a= nd > > > commands, etc. for you. > > > Any help would be much appreciated. > > > > This is a known problem (see PR 236220) and has been fixed by r350894 > > (and MFC-ed into 12-STABLE, so I guess it should be in the upcoming > > 12.1-RELEASE) > > > > > > > > Best regards, > > > > > > Reshad > > > _______________________________________________ > > > freebsd-fs@freebsd.org mailing list > > > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > > > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > > > > -- > > Julien Cigar > > Belgian Biodiversity Platform (http://www.biodiversity.be) > > PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 > > No trees were killed in the creation of this message. > > However, many electrons were terribly inconvenienced. > > --=20 Julien Cigar Belgian Biodiversity Platform (http://www.biodiversity.be) PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 No trees were killed in the creation of this message. However, many electrons were terribly inconvenienced. --hTKW8p8tUZ/8vLMe Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE7vn2l0to0nV7EWolsrs3EKIEI8AFAl2TM80ACgkQsrs3EKIE I8Caag/+L+vUrfIjZDl1Ik+T7ymdxFWo2HhuZuzPhyRivmxUDTpkBRgQd0tzYBnp rP9gP0eBb4kNAU6jTHm9xzEnafScOPnQxUVYP3/Js14MxF6GcuuODc/vPprqL6B2 qMec3TWUlLu20WWkxKoLkPVcHyk9JSlpkNGaVoO8beRm6INMwU2sgGdIdb5Fnylo PyXyZZteiBgGNYZ/rLCTL1wUVdrqkGYHaKPOi49jThd6alGZrBHUVwTCkrEn4wBM KbgfB06fSlTqyFh83ca7qugYd6837bZscGQUYKLQa3Cd+9GFY6On37PrVZdaUgZG HPRmYt9csARXRXKO9AnN4iRZUmAb2+Mg2ft3bqnea8PuDxvKIH5Q1oJ0JT2boi7L jF8ijzUyTcMb1iaAbXZHasKNk25UZatyy93nrPTDWWCyb7ivHHiG+jEnJpxzTrfE +StICVnwGzOwVBTKI3aSel488Zg6iwW9QudQoacRkm6Pvr0B/glEUBGl1bECC84i cOxhQIq/OKdhj+AIkIVEGMflp7IetYU3ucPG5Rara3717g5b59/7Poi9pZNSo6cs Oto97SyPfrJD2fLoug4cjKqSigGOV4c20ksnuweRM6EXCYFhD7SgG9nD7To2WCb6 1R6gapKOKHLbcuqI/F/sJrd+vlyBrf9m1J0SyjH+4hwC8PKJA9E= =+CrQ -----END PGP SIGNATURE----- --hTKW8p8tUZ/8vLMe--
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