Date: Wed, 1 Mar 2006 00:47:12 +0200 From: Rostislav Krasny <rosti.bsd@gmail.com> To: Hajimu UMEMOTO <ume@freebsd.org> Cc: freebsd-stable@freebsd.org, freebsd-stable-local@be-well.ilk.org, yar@comp.chem.msu.su, dwmalone@maths.tcd.ie, des@des.no, mak@ll.mit.edu, MH@kernel32.de Subject: Re: SSH login takes very long time...sometimes Message-ID: <20060301004712.ba7eb061.rosti.bsd@gmail.com> In-Reply-To: <ygeveuz33ld.wl%ume@mahoroba.org> References: <20060218012029.e146e2ff.rosti.bsd@gmail.com> <20060219104912.GB20500@comp.chem.msu.su> <20060219225701.0e3e244b.rosti.bsd@gmail.com> <20060221165959.GB77513@comp.chem.msu.su> <20060222024430.ad4b5c60.rosti.bsd@gmail.com> <yge1wxvz5ha.wl%ume@mahoroba.org> <20060223235727.33cddb13.rosti.bsd@gmail.com> <ygefym98o7i.wl%ume@mahoroba.org> <20060224155153.f7da1a52.rosti.bsd@gmail.com> <ygewtfkelbu.wl%ume@mahoroba.org> <20060227151954.GV6435@comp.chem.msu.su> <ygeveuz33ld.wl%ume@mahoroba.org>
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On Wed, 01 Mar 2006 00:28:14 +0900 Hajimu UMEMOTO <ume@freebsd.org> wrote: > Hi, > > >>>>> On Mon, 27 Feb 2006 18:19:54 +0300 > >>>>> Yar Tikhiy <yar@comp.chem.msu.su> said: > > yar> I finally spared some time to test your recent changes and found > yar> that the resolver still would retry using the first, and only the > yar> first, domain on the `search' list when the nameserver was down, > yar> which effectively led to another kind of request doubling. > > yar> A similar effect was observed when a `domain' line was specified > yar> in resolv.conf in place of `search'. > > yar> Is there a real reason to retry with a different domain when the > yar> nameserver doesn't respond at all? > > It seems yet another issue. The errors returned by res_querydomain() > are not handled uniformity. Please try following patch: Thank you! After applaying that additional patch a number of DNS queries to unreachable name servers has decreased. Now, with three unreachable name servers in resolv.conf and previously patched (my and your patches) ftpd(8), I can successfully login to this machine by even not patched ftp(1) from other FreeBSD 6.1-pre
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