From: Eric Wong <e@80x24.org>
To: Tony Devlin <tonydevlin@gmail.com>
Cc: unicorn-public@bogomips.org
Subject: Re: Weird Unicorn Timeout Issues (Hibernation problem?)
Date: Mon, 4 Aug 2014 19:45:09 +0000 [thread overview]
Message-ID: <20140804194508.GB31366@dcvr.yhbt.net> (raw)
In-Reply-To: <CAKM1sPPUqhwmY8sDL99Ay64cFm6w=9s8FoZ+P9YEfSaBrTiyxQ@mail.gmail.com>
Tony Devlin <tonydevlin@gmail.com> wrote:
> Thank you Eric,
>
> I will look into the other worker to see what is going on with it. I still
> appreciate any hints you all can give me on where I can check. I'm also
> looking into the OS TCP timeouts to see if what Daniel said may be a
> problem.
General rule for me is to get the problem reproducible in the smallest
possible way. That could mean removing features, cutting out large
chunks of code, cutting out certain request types, reducing
workers.
More things:
1) Can you make sure nginx is not trying to maintain persistent
connections? nginx should respect unicorn closing the connection
but I haven't checked the latest versions of nginx.
lsof can help here, too.
unicorn currently does not do persistent connections, allowing
an M:N relationship between nginx instances and unicorn
instances[1]
2) Any other odd external dependencies such as NFS mounts,
file locks, FIFOs, etc?
[1] Perhaps persistent connections will be an option in the future
if the support/documentation overhead is worth it, as nginx
supports persistent connections to backends nowadays.
next prev parent reply other threads:[~2014-08-04 19:45 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-04 18:12 Weird Unicorn Timeout Issues (Hibernation problem?) Tony Devlin
2014-08-04 18:39 ` Eric Wong
2014-08-04 18:41 ` Kapil Israni
2014-08-04 18:48 ` Eric Wong
2014-08-04 18:45 ` Tony Devlin
2014-08-04 19:11 ` Eric Wong
2014-08-04 19:21 ` Tony Devlin
2014-08-04 19:45 ` Eric Wong [this message]
2014-08-04 20:06 ` Michael Fischer
2014-08-04 18:55 ` Daniel Condomitti
2014-08-04 19:34 ` Eric Wong
2014-08-04 20:24 ` Tony Devlin
2014-08-04 20:44 ` Eric Wong
2014-08-04 20:46 ` Eric Wong
2014-08-05 14:46 ` Tony Devlin
2014-08-06 9:45 ` Eric Wong
2014-08-06 14:05 ` Tony Devlin
2014-08-06 18:26 ` Daniel Condomitti
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:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
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=20140804194508.GB31366@dcvr.yhbt.net \
--to=e@80x24.org \
--cc=tonydevlin@gmail.com \
--cc=unicorn-public@bogomips.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://yhbt.net/unicorn.git/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).