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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

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

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.

  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

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