From: Clifton King <cliftonk@gmail.com>
To: unicorn list <mongrel-unicorn@rubyforge.org>
Subject: Re: Unicorn and HAProxy, 500 Internal errors after checks
Date: Wed, 1 Dec 2010 10:12:37 -0600 [thread overview]
Message-ID: <AANLkTi=uRcEpiOfLOgSLrrR8F9jAJMpfzXiYk3+Ra+-s@mail.gmail.com> (raw)
In-Reply-To: <AANLkTim=DQ7qKBK-r6WKW5P4kvjm8neELKA0BQ-xB6UL@mail.gmail.com>
Pierre,
Any specific reason you're using HAProxy for Unicorn?
Clifton
On Wed, Dec 1, 2010 at 5:59 AM, Pierre <oct@fotopedia.com> wrote:
> Hi,
>
> This morning, while checking for a correct deployment, we found out
> that the Unicorns we are using were sending 500 Internal errors very
> frequently to the HAProxy that sits in front of them. After some
> investigation, It turned out that HAProxy checks the backend by
> opening and closing a connection to the unicorn. Unfortunately the
> Unicorns we use ( v 0.990.0 ) will try to reply to this probe by a
> 500, resulting in the error being sent to the HAProxy when the proxy
> has already close the connection. I think Unicorn should refrain from
> sending an error in this case. There is no visible side effect,
> excepted that there are a "lot" of 500s running on the wire that
> nobody will ever read. Also, these errors are not sent in the Unicorn
> log, making it quite difficult to understand what's going on :-)
>
> Cheers,
> --
> Pierre <oct@fotopedia.com>
> Server Shepherd at http://www.fotopedia.com/
> _______________________________________________
> Unicorn mailing list - mongrel-unicorn@rubyforge.org
> http://rubyforge.org/mailman/listinfo/mongrel-unicorn
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next prev parent reply other threads:[~2010-12-01 16:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-01 11:59 Unicorn and HAProxy, 500 Internal errors after checks Pierre
2010-12-01 16:12 ` Clifton King [this message]
2010-12-01 17:02 ` Pierre
2010-12-01 16:52 ` Eric Wong
2010-12-01 17:14 ` Pierre
2010-12-01 19:58 ` Eric Wong
2010-12-02 0:42 ` Lawrence Pit
2010-12-02 4:59 ` Eric Wong
2010-12-02 8:38 ` Pierre
2010-12-02 17:39 ` Eric Wong
2010-12-03 8:41 ` Pierre
2010-12-04 23:38 ` Eric Wong
2010-12-05 1:04 ` russell muetzelfeldt
2010-12-06 18:39 ` Eric Wong
2010-12-02 17:41 ` Eric Wong
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