From: Michael Fischer <mfischer@zendesk.com> To: Eric Wong <e@80x24.org> Cc: unicorn-public <unicorn-public@bogomips.org> Subject: Re: nginx reverse proxy getting ECONNRESET Date: Tue, 24 Mar 2015 23:02:46 +0000 [thread overview] Message-ID: <CABHxtY7+dhCt39Qi6=+DWVd4oxpNMmWDZVe1a9rXKmtez6KAvw@mail.gmail.com> (raw) In-Reply-To: <20150324225437.GA21975@dcvr.yhbt.net> On Tue, Mar 24, 2015 at 10:54 PM, Eric Wong <e@80x24.org> wrote: > Michael Fischer <mfischer@zendesk.com> wrote: >> We have an nginx 1.6.2 proxy in front of a Unicorn 4.8.3 server that >> is frequently reporting the following error: >> >> 2015/03/24 01:46:01 [error] 11217#0: *872231 readv() failed (104: >> Connection reset by peer) while reading upstream >> >> The interesting things are: >> >> 1) The upstream is a Unix domain socket (to which Unicorn is bound) >> 2) Unicorn isn't reporting that a child died in the error log (and I >> verified their lifetimes with ps(1)) >> >> Any hints as to what we should look for? > > What changed recently with your setup? We upgraded nginx from 1.4.7 to 1.6.2. The frequency of the error has increased significantly since. But I hesitate to point the finger at nginx without more evidence, since its developers are very skilled. > Which OS/kernel version + vendor version? uname -3.13.0-40-generic #69~precise1-Ubuntu Ruby 2.1.1 > Can you setup a test instance on a different nginx port/unicorn socket > and with a config.ru such as: > > ------------------------- 8< ---------------------- > run(lambda do |env| > $stderr.write("#$$ starting at #{Time.now}\n") > # be sure to configure your unicorn timeout > sleep > # should not return, wait for unicorn to kill > end) > ---------------------------------------------------- > > And hitting nginx with a single test request to reproduce the issue. I'll take that step later if I have to, but I'm not sure what evidence that would provide, since we're not having timeout issues -- when this happens, the response time reported by nginx is usually just a few seconds (Unicorn timeout is 90 seconds), Thanks, --Michael
next prev parent reply other threads:[~2015-03-24 23:02 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-03-24 22:43 Michael Fischer 2015-03-24 22:54 ` Eric Wong 2015-03-24 22:59 ` Eric Wong 2015-03-24 23:04 ` Michael Fischer 2015-03-24 23:23 ` Eric Wong 2015-03-24 23:29 ` Michael Fischer 2015-03-24 23:46 ` Eric Wong 2015-03-24 23:55 ` Eric Wong 2015-03-25 9:41 ` Michael Fischer 2015-03-25 10:12 ` Eric Wong 2015-03-25 9:48 ` Michael Fischer 2015-03-24 23:02 ` Michael Fischer [this message] 2015-04-08 16:22 Gabe Martin-Dempesy
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