From owner-freebsd-fs@freebsd.org Tue Oct 1 08:28:43 2019 Return-Path: Delivered-To: freebsd-fs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 1D2C91302D5 for ; Tue, 1 Oct 2019 08:28:43 +0000 (UTC) (envelope-from SRS0=W37K=X2=perdition.city=julien@bebif.be) Received: from orval.bbpf.belspo.be (orval.bbpf.belspo.be [193.191.208.90]) by mx1.freebsd.org (Postfix) with ESMTP id 46jC8n29FNz4Zgd for ; Tue, 1 Oct 2019 08:28:40 +0000 (UTC) (envelope-from SRS0=W37K=X2=perdition.city=julien@bebif.be) Received: from home.lan (unknown [77.109.104.59]) by orval.bbpf.belspo.be (Postfix) with ESMTPSA id 078A91D4FC23; Tue, 1 Oct 2019 10:28:38 +0200 (CEST) Date: Tue, 1 Oct 2019 10:28:37 +0200 From: Julien Cigar To: Reshad Patuck Cc: freebsd-fs@freebsd.org Subject: Re: [zfs] filesystem reads hanging Message-ID: <20191001082837.GF49734@home.lan> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="eDB11BtaWSyaBkpc" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.11.4 (2019-03-13) X-Rspamd-Queue-Id: 46jC8n29FNz4Zgd X-Spamd-Bar: ------- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of SRS0=W37K=X2=perdition.city=julien@bebif.be designates 193.191.208.90 as permitted sender) smtp.mailfrom=SRS0=W37K=X2=perdition.city=julien@bebif.be X-Spamd-Result: default: False [-7.08 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RECEIVED_SPAMHAUS_PBL(0.00)[59.104.109.77.khpj7ygk5idzvmvt5x4ziurxhy.zen.dq.spamhaus.net : 127.0.0.11]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; DMARC_NA(0.00)[perdition.city]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[90.208.191.193.list.dnswl.org : 127.0.10.0]; SIGNED_PGP(-2.00)[]; FREEMAIL_TO(0.00)[gmail.com]; FORGED_SENDER(0.30)[julien@perdition.city,SRS0=W37K=X2=perdition.city=julien@bebif.be]; RCVD_NO_TLS_LAST(0.10)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; ASN(0.00)[asn:2611, ipnet:193.191.192.0/19, country:BE]; FROM_NEQ_ENVFROM(0.00)[julien@perdition.city,SRS0=W37K=X2=perdition.city=julien@bebif.be]; IP_SCORE(-3.08)[ip: (-9.21), ipnet: 193.191.192.0/19(-4.60), asn: 2611(-1.60), country: BE(-0.01)]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Oct 2019 08:28:43 -0000 --eDB11BtaWSyaBkpc Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Oct 01, 2019 at 10:26:32AM +0530, Reshad Patuck wrote: > Hi, Hello, >=20 > I have a FreeBSD 12.0-RELEASE-p9 system running ZFS. > The system runs an application that uses postgres, and python (among other > services). >=20 > I have noticed that python suddenly is not able to connect to postgres. > When I try to investigate further, certain files on disk can not be read. > The commands `cat` and `ls -l` hang (no output and I can not ctrl-c or ki= ll > -9 them), ps -aux shows them in a D+ state. > On killing the SSH session these processes continue running in orphans, I > am not able to kill them. >=20 > 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". >=20 > 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 fine > 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 shutting > down stage of a soft reboot. >=20 > I am not sure where to start debugging this or if there are any ways to g= et > metrics on a box stuck in this state. > Please let me know if you would like me to fetch any metrics or run and > 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) >=20 > Best regards, >=20 > 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" --=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. 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