unicorn Ruby/Rack server user+dev discussion/patches/pulls/bugs/help
 help / color / mirror / code / Atom feed
From: Eric Wong <e@80x24.org>
To: Michael Fischer <mfischer@zendesk.com>
Cc: unicorn-public <unicorn-public@bogomips.org>
Subject: Re: nginx reverse proxy getting ECONNRESET
Date: Wed, 25 Mar 2015 10:12:07 +0000	[thread overview]
Message-ID: <20150325101207.GA30908@dcvr.yhbt.net> (raw)
In-Reply-To: <CABHxtY4Ba1rsGKQiTHCX250CcD871oOW3oqBxgFnELg8iw7FCw@mail.gmail.com>

Michael Fischer <mfischer@zendesk.com> wrote:
> On Tue, Mar 24, 2015 at 11:55 PM, Eric Wong <e@80x24.org> wrote:
> > Actually, are you getting 502 errors returned from nginx in this case?
> > That would not be harmless.  I suggest ensuring rack.input is
> > fully-drained if that is the case (perhaps using PrereadInput).
> No, they're all 200 responses with a zero-length body size.  It's the
> first time I'd ever seen such a combination of symptoms.

OK, thanks for the update.

I was wondering if including a Unicorn::PostreadInput middleware should
be introduced to quiet your logs.  It should have the same effect as
PrereadInput, but should provide better performance in the common case
and also be compatible with "rewindable_input false" users.

class Unicorn::PostreadInput
  def initialize(app)
    @app = app

  def call(env)
    input = env["rack.input"] # save it here, in case the app reassigns it
    # Ensure the HTTP request is entirely read off the socket even
    # if the app aborts early.  This should prevent nginx from
    # complaining about ECONNRESET errors.
    unless env["rack.hijack_io"]
      buf = ''
      true while input.read(16384, buf)

(totally untested)

"Postread" doesn't sound quite right, though...

  reply	other threads:[~2015-03-25 10:12 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 [this message]
2015-03-25  9:48             ` Michael Fischer
2015-03-24 23:02   ` Michael Fischer
2015-04-08 16:22 Gabe Martin-Dempesy

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

  List information: https://yhbt.net/unicorn/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20150325101207.GA30908@dcvr.yhbt.net \
    --to=e@80x24.org \
    --cc=mfischer@zendesk.com \
    --cc=unicorn-public@bogomips.org \
    --subject='Re: nginx reverse proxy getting ECONNRESET' \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

unicorn Ruby/Rack server user+dev discussion/patches/pulls/bugs/help

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://yhbt.net/unicorn-public
	git clone --mirror http://ou63pmih66umazou.onion/unicorn-public

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 unicorn-public unicorn-public/ https://yhbt.net/unicorn-public \
		unicorn-public@yhbt.net unicorn-public@bogomips.org mongrel-unicorn@rubyforge.org mongrel-unicorn-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org
	public-inbox-index unicorn-public

Example config snippet for mirrors.
Newsgroups are available over NNTP:
 note: .onion URLs require Tor: https://www.torproject.org/

code repositories for project(s) associated with this inbox:


AGPL code for this site: git clone http://7fh6tueqddpjyxjmgtdiueylzoqt6pt7hec3pukyptlmohoowvhde4yd.onion/public-inbox.git