Re: [Mongrel] Mongrel service keeps re-starting ruby

Jonathan Rochkind
Thu, 25 Jun 2009 07:14:27 -0700

Ah, actually reading your stack trace, I see it is indeed the --prefixand modern versions of Rails issue. I still don't know why thatconsumes all CPU instead of just reporting an error.

But mongrel is trying to call a method that no longer exists in RAils2.3 like you have. (I think it dissappeared in Rails 2.2, but could bewrong, it's definitely gone in Rails 2.3).

Try dropping this file in your app's config/initializers directory, tobasically restore the method that mongrel is trying to call, as awrapper for the new way to trigger this functionality.


config/initializers/patch_for_mongrel.rb  [name of file can be anything]

# Fix for mongrel which still doesn't know about Rails 2.2's changes, grr.

# We provide a backwards compatible wrapper around the newActionController::base.relative_url_root,# so it can still be called off of the actually non-existingAbstractRequest class.


module ActionController
 class AbstractRequest < ActionController::Request
   def self.relative_url_root=(path)
     ActionController::Base.relative_url_root=(path)
   end
   def self.relative_url_root
     ActionController::Base.relative_url_root
   end
 end
end

Michael Pliskin wrote:

Dear Luis,

Thanks a lot for replying, I followed your advice and it revealed the problem: 
it was the --prefix switch that caused it. When I start it like
E:\RailsApps\3vi>mongrel_rails start -e development -p 3001 -a 127.0.0.1 -l "e:/RailsApps/3vi/log/1.log" -P 
"e:/RailsApps/3vi/log/mongrel.pid" -t 0 -r "public" -n 1024 --prefix "/labelyzer"
I am given a ton of errors:
** Starting Mongrel listening at 127.0.0.1:3001
** Starting Rails with development environment...
** Mounting Rails at /labelyzer...
D:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:440:in
 `load_missing_constant': uninitialized constant 
ActionController::AbstractRequest (NameError)
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:80:in
 `const_missing'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel/rails.rb:151:in
 `rails'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mongrel_rails:113:in
 `cloaker_'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel/configurator.rb:149:in
 `call'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel/configurator.rb:149:in
 `listener'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mongrel_rails:99:in
 `cloaker_'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel/configurator.rb:50:in
 `call'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel/configurator.rb:50:in
 `initialize'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mongrel_rails:84:in
 `new'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mongrel_rails:84:in
 `run'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel/command.rb:212:in
 `run'
        from 
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/mongrel_rails:281
        from D:/Ruby/bin/mongrel_rails:19:in `load'
        from D:/Ruby/bin/mongrel_rails:19

And if I skip --prefix, it's all fine. Any ideas?

Thanks in advance,
 Mike

-----Original Message-----
From: mongrel-users-boun...@rubyforge.org 
[mailto:mongrel-users-boun...@rubyforge.org] On Behalf Of Luis Lavena
Sent: Thursday, June 25, 2009 4:20 PM
To: mongrel-users@rubyforge.org
Subject: Re: [Mongrel] Mongrel service keeps re-starting ruby

On Thu, Jun 25, 2009 at 2:07 AM, Michael Pliskin<m...@comapping.com> wrote:

Hi all,



Some disclaimer first: I am a complete newbie in mongrel and this list, so
please forgive me if I say something weird. I have a problem, I've googled
for a solution for quite a while and failed so far, so decided to ask here.



I am trying to set up my Rails application on Windows according to this
manual:
http://nlakkakula.wordpress.com/2008/11/24/10-steps-for-deploying-your-ruby-on-rails-application-on-a-windows-server-2008-apache-mongrel-cluster/
. Everything is ok however when I completed all the steps, Apache complains
that it cannot contact proxy - meaning there is something wrong with
mongrel. I digged further and found mongrel keeping re-starting the ruby
process. If I look into a task manager, the picture is like:

-          A ruby.exe process is started

-          It eats 100% CPU for 5 seconds

-          It also eats about 25MB RAM

-          It dies then

And the process repeats forever. It looks like there is some error happening
but I don't know any way to capture it.



My OS is Win2k Advanced Server SP4. Any ideas?



Thanks,

  Mike Pliskin


That behavior is normal with mongrel_service. has been implemented in
a way that the ruby process automatically restart in case of a
failure, which is seems is happening in the background.

To debug this, please start mongrel standalone:

cd my_app
mongrel_rails start

Doing that, you should see, on the console, what is happening.

Please paste the results on your reply so I can help you out.

Cheers,
--
Luis Lavena
AREA 17
-
Perfection in design is achieved not when there is nothing more to add,
but rather when there is nothing more to take away.
Antoine de Saint-Exupéry
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