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From: Jeremy Evans <code@jeremyevans.net>
To: Eric Wong <e@80x24.org>
Cc: Stan Pitucha <stan.pitucha@envato.com>, unicorn-public@bogomips.org
Subject: Re: Issues after 5.5.0 upgrade
Date: Tue, 5 Mar 2019 21:57:34 -0800
Message-ID: <20190306055734.GC61406@jeremyevans.local> (raw)
In-Reply-To: <20190306044432.ypql4czq2bu2eipu@dcvr>

On 03/06 04:44, Eric Wong wrote:
> Stan Pitucha <stan.pitucha@envato.com> wrote:
> > > I only saw one issue (proposed fix below).
> > Sorry, I solved the other one while writing the email but forgot to
> > update the intro.
> >
> > So the fix worked for the issue I mentioned, thanks! Also, running
> > unicorn directly works just fine now.
> 
> You're welcome and thanks for following up!
> 
> > I ran into another regression with unicorn_rails though. We're doing
> > some work in `after_fork` which relies on a class found in
> > `lib/logger_switcher.rb`. Unfortunately it looks like the scope
> > changed and now I get workers respawning in a loop:
> > 
> > E, [2019-03-06T15:03:04.990789 #46680] ERROR -- : uninitialized
> > constant #<Class:#<Unicorn::Configurator:0x00007fc3d113d098>>::LoggerSwitcher
> > (NameError)
> 
> Is this with `preload_app true`?  I'm not too up-to-date
> with scoping and namespace behavior stuff, actually.

This is just a guess, but we probably want to call the Unicorn.builder
lambda with the same arguments as the rails_builder lambda.

diff --git a/bin/unicorn_rails b/bin/unicorn_rails
index ea4f822..354c1df 100755
--- a/bin/unicorn_rails
+++ b/bin/unicorn_rails
@@ -132,11 +132,11 @@ def rails_builder(ru, op, daemonize)
 
   # this lambda won't run until after forking if preload_app is false
   # this runs after config file reloading
-  lambda do ||
+  lambda do |x, server|
     # Rails 3 includes a config.ru, use it if we find it after
     # working_directory is bound.
     ::File.exist?('config.ru') and
-      return Unicorn.builder('config.ru', op).call
+      return Unicorn.builder('config.ru', op).call(x, server)
 
     # Load Rails and (possibly) the private version of Rack it bundles.
     begin

If that doesn't fix it, keep reading.

If after_fork is referencing LoggerSwitcher, and preload_app is not set,
then I think the failure should be expected, as in that case after_fork
is called before build_app!.  That would not explain a regression,
though, as that behavior should have been true in 5.4.1.

Does the problem go away if you switch after_fork to after_worker_ready?
Is preload_app set to true?

Thanks,
Jeremy

  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-06  1:47 Stan Pitucha
2019-03-06  2:48 ` Eric Wong
2019-03-06  4:07   ` Stan Pitucha
2019-03-06  4:44     ` Eric Wong
2019-03-06  5:57       ` Jeremy Evans [this message]
2019-03-06  7:27         ` Stan Pitucha
2019-03-07  2:28           ` [PATCH] unicorn_rails: fix regression with Rails >= 3.x in app build Eric Wong

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