# Rails 3 b2+nginx report error "no such file to load -- rack"

**URL:** <https://www.ruby-forum.com/t/rails-3-b2-nginx-report-error-no-such-file-to-load-rack/186313>\
**Category:** Rails\
**Created:** [April 4, 2010, 5:13pm UTC](https://www.ruby-forum.com/t/rails-3-b2-nginx-report-error-no-such-file-to-load-rack/186313 "2010-04-04T17:13:00Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![jsakuma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c4cdca/32.png) [@jsakuma](https://www.ruby-forum.com/u/jsakuma)\
**Post date:** [April 4, 2010, 5:13pm UTC](https://www.ruby-forum.com/t/rails-3-b2-nginx-report-error-no-such-file-to-load-rack/186313/1 "2010-04-04T17:13:00Z")

</div>

Thank you for all your help!!!

\<rails 3 beta2+nginx report error “no such file to load – rack”\>

I already used google to search this question when I send this message.

but I did not find method of solution.

==================================

```
     System: Snow leopard 10.6.2

```

RVM-\>Ruby: ruby 1.9.2dev (2010-04-04 trunk 27215) [i386-darwin10.0.0]  
gem: 1.3.6  
Rails: Rails 3.0.0.beta2  
database: PostgreSQL 8.4.3

==================================

and set database.yml and nginx.conf

database.yml  
development:  
adapter: postgresql  
encoding: unicode  
database: horn\_development  
pool: 5  
username: shajun  
password: admin123

==================================

nginx.conf  
passenger\_root  
/Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11;  
passenger\_ruby /Users/shajun/.rvm/rubies/ruby-1.9.2-head/bin/ruby;

server {  
listen 3001;  
server\_name horn.local;  
root /Users/shajun/project/horn/public; # \<— be sure to  
point to ‘public’!  
passenger\_enabled on;  
rack\_env development;  
}

==================================

\*\*\* LOCAL GEMS \*\*\*

abstract (1.0.0)  
actionmailer (3.0.0.beta2)  
actionpack (3.0.0.beta2)  
activemodel (3.0.0.beta2)  
activerecord (3.0.0.beta2)  
activeresource (3.0.0.beta2)  
activesupport (3.0.0.beta2, 2.3.5)  
arel (0.3.3)  
builder (2.1.2)  
bundler (0.9.14)  
erubis (2.6.5)  
fastthread (1.0.7)  
i18n (0.3.6)  
mail (2.1.5.3)  
memcache-client (1.8.1)  
mime-types (1.16)  
passenger (2.2.11)  
pg (0.9.0)  
polyglot (0.3.1)  
rack (1.1.0)  
rack-mount (0.6.1)  
rack-test (0.5.3)  
rails (3.0.0.beta2)  
railties (3.0.0.beta2)  
rake (0.8.7)  
text-format (1.0.0)  
text-hyphen (1.0.0)  
thor (0.13.4)  
treetop (1.4.5)  
tzinfo (0.3.18)

==================================

Error: (when input loclhost:3001 in borwser)

Ruby (Rack) application could not be started

A source file that the application requires, is missing.  
It is possible that you didn’t upload your application files correctly.  
Please check whether all your application files are uploaded.  
A required library may not installed. Please install all libraries that  
this application requires.  
Further information about the error may have been written to the  
application’s log file. Please check it in order to analyse the problem.  
Error message:  
no such file to load – rack  
Exception class:  
LoadError  
Application root:  
/Users/shajun/project/horn  
Backtrace:

# File Line Location

0  
/Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion\_passenger/rack/application\_spawner.rb  
143 in `require' 1 /Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion_passenger/rack/application_spawner.rb 143 in `load\_rack\_app’  
2  
/Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion\_passenger/rack/application\_spawner.rb  
104 in `block in run' 3 /Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion_passenger/utils.rb 255 in `report\_app\_init\_status’  
4  
/Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion\_passenger/rack/application\_spawner.rb  
87 in `run' 5 /Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion_passenger/rack/application_spawner.rb 65 in `block in spawn\_application’  
6  
/Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion\_passenger/utils.rb  
184 in `safe_fork' 7 /Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion_passenger/rack/application_spawner.rb 58 in `spawn\_application’  
8  
/Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion\_passenger/rack/application\_spawner.rb  
41 in `spawn_application' 9 /Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion_passenger/spawn_manager.rb 159 in `spawn\_application’  
10  
/Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion\_passenger/spawn\_manager.rb  
287 in `handle_spawn_application' 11 /Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion_passenger/abstract_server.rb 352 in `main\_loop’  
12  
/Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/lib/phusion\_passenger/abstract\_server.rb  
196 in `start_synchronously' 13 /Users/shajun/.rvm/gems/ruby-1.9.2-head/gems/passenger-2.2.11/bin/passenger-spawn-server 61 in `’

==================================

but when I run “rails server” in application

sha-juns-Mac-Pro:horn shajun$ rails server  
=\> Booting WEBrick  
=\> Rails 3.0.0.beta2 application starting in development on  
[http://0.0.0.0:3000](http://0.0.0.0:3000)  
=\> Call with -d to detach  
=\> Ctrl-C to shutdown server  
[2010-04-04 23:09:20] INFO WEBrick 1.3.1  
[2010-04-04 23:09:20] INFO ruby 1.9.2 (2010-04-04) [i386-darwin10.0.0]  
[2010-04-04 23:09:20] INFO WEBrick::HTTPServer#start: pid=1044  
port=3000

I would really appreciate your help !!!

jun sha

---

<div class="post-metadata">

**Author:** ![jsakuma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c4cdca/32.png) [@jsakuma](https://www.ruby-forum.com/u/jsakuma)\
**Post date:** [April 4, 2010, 6:24pm UTC](https://www.ruby-forum.com/t/rails-3-b2-nginx-report-error-no-such-file-to-load-rack/186313/2 "2010-04-04T18:24:23Z")

</div>

Hi, did you add the rack gem to your gem file?

-Conrad

Sent from my iPhone

---

<div class="post-metadata">

**Author:** ![jsakuma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c4cdca/32.png) [@jsakuma](https://www.ruby-forum.com/u/jsakuma)\
**Post date:** [April 5, 2010, 6:43am UTC](https://www.ruby-forum.com/t/rails-3-b2-nginx-report-error-no-such-file-to-load-rack/186313/3 "2010-04-05T06:43:46Z")

</div>

Conrad T. wrote:

> Hi, did you add the rack gem to your gem file?
> 
> -Conrad
> 
> Sent from my iPhone

: - ) Thans! Conrad

I checked my app gem file :

================================================

sha-juns-Mac-Pro:gems shajun$ ls -la  
total 0  
drwxr-xr-x 32 shajun staff 1088 Apr 4 21:17 .  
drwxr-xr-x 7 shajun staff 238 Apr 4 21:10 …  
drwxr-xr-x 8 shajun staff 272 Apr 4 21:10 abstract-1.0.0  
drwxr-xr-x 6 shajun staff 204 Apr 4 21:14 actionmailer-3.0.0.beta2  
drwxr-xr-x 6 shajun staff 204 Apr 4 21:14 actionpack-3.0.0.beta2  
drwxr-xr-x 6 shajun staff 204 Apr 4 21:14 activemodel-3.0.0.beta2  
drwxr-xr-x 6 shajun staff 204 Apr 4 21:14 activerecord-3.0.0.beta2  
drwxr-xr-x 6 shajun staff 204 Apr 4 21:14  
activeresource-3.0.0.beta2  
drwxr-xr-x 5 shajun staff 170 Apr 4 21:10 activesupport-2.3.5  
drwxr-xr-x 5 shajun staff 170 Apr 4 21:13  
activesupport-3.0.0.beta2  
drwxr-xr-x 6 shajun staff 204 Apr 4 21:13 arel-0.3.3  
drwxr-xr-x 9 shajun staff 306 Apr 4 21:10 builder-2.1.2  
drwxr-xr-x 8 shajun staff 272 Apr 4 21:10 bundler-0.9.14  
drwxr-xr-x 14 shajun staff 476 Apr 4 21:10 erubis-2.6.5  
drwxr-xr-x 11 shajun staff 374 Apr 4 21:17 fastthread-1.0.7  
drwxr-xr-x 8 shajun staff 272 Apr 4 21:10 i18n-0.3.6  
drwxr-xr-x 7 shajun staff 238 Apr 4 21:10 mail-2.1.5.3  
drwxr-xr-x 11 shajun staff 374 Apr 4 21:10 memcache-client-1.8.1  
drwxr-xr-x 12 shajun staff 408 Apr 4 21:10 mime-types-1.16  
drwxr-xr-x 18 shajun staff 612 Apr 4 21:22 passenger-2.2.11  
drwxr-xr-x 18 shajun staff 612 Apr 4 21:16 pg-0.9.0  
drwxr-xr-x 9 shajun staff 306 Apr 4 21:10 polyglot-0.3.1  
drwxr-xr-x 13 shajun staff 442 Apr 4 21:10 rack-1.1.0  
drwxr-xr-x 5 shajun staff 170 Apr 4 21:10 rack-mount-0.6.1  
drwxr-xr-x 12 shajun staff 408 Apr 4 21:10 rack-test-0.5.3  
drwxr-xr-x 3 shajun staff 102 Apr 4 21:14 rails-3.0.0.beta2  
drwxr-xr-x 7 shajun staff 238 Apr 4 21:14 railties-3.0.0.beta2  
drwxr-xr-x 12 shajun staff 408 Apr 4 21:10 text-format-1.0.0  
drwxr-xr-x 10 shajun staff 340 Apr 4 21:10 text-hyphen-1.0.0  
drwxr-xr-x 9 shajun staff 306 Apr 4 21:10 thor-0.13.4  
drwxr-xr-x 9 shajun staff 306 Apr 4 21:10 treetop-1.4.5  
drwxr-xr-x 8 shajun staff 272 Apr 4 21:10 tzinfo-0.3.18

================================================

drwxr-xr-x 13 shajun staff 442 Apr 4 21:10 rack-1.1.0  
drwxr-xr-x 5 shajun staff 170 Apr 4 21:10 rack-mount-0.6.1  
drwxr-xr-x 12 shajun staff 408 Apr 4 21:10 rack-test-0.5.3

================================================

I read the release message → “Rails 3.0: Second beta release” → from

> **[Ruby on Rails](https://rubyonrails.org)**
>
> A web-app framework that includes everything needed to create database-backed web applications according to the Model-View-Controller (MVC) pattern.

> **[Blog](https://rubyonrails.org/blog/)**
>
> A web-app framework that includes everything needed to create database-backed web applications according to the Model-View-Controller (MVC) pattern.

Note that Ruby 1.8.7 p248 and p249 has marshaling bugs that crash both  
Rails 2.3.x and Rails 3.0.0. Ruby 1.9.1 outright segfaults on Rails  
3.0.0, so if you want to use Rails 3 with 1.9.x, jump on 1.9.2 trunk for  
smooth sailing.

================================================

and, someone suggested that I delete [config.ru](http://config.ru) or change nginx.conf as  
below :

- rails\_env development; → rack\_env development;

server {  
listen 3001;  
server\_name horn.local;  
root /Users/shajun/project/horn/public; # \<— be sure to  
point to ‘public’!  
passenger\_enabled on;

```
    "rails_env development; -> rack_env development;"

 }

```

but I could not decide this question.

================================================

Thank you very much again! Conrad

from Jun Sha

---

<div class="post-metadata">

**Author:** ![jsakuma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c4cdca/32.png) [@jsakuma](https://www.ruby-forum.com/u/jsakuma)\
**Post date:** [April 26, 2010, 7:15pm UTC](https://www.ruby-forum.com/t/rails-3-b2-nginx-report-error-no-such-file-to-load-rack/186313/4 "2010-04-26T19:15:03Z")

</div>

Jun Sha wrote:

> Hi, Conrad
> 
> I find method of solution about “no such file to load – rack”
> 
> [http://rvm.beginrescueend.com/integration/passenger/](http://rvm.beginrescueend.com/integration/passenger/)
> 
> =========================================
> 
> in /opt/nginx/conf/nginx.conf
> 
> passenger\_ruby /home/wayne/.rvm/bin/passenger\_ruby;
> 
> instead of
> 
> you current ruby version as “ruby 1.9.2-head…”
> 
> =========================================
> 
> and then when I input localhost:3002 in browser and click link - \> About  
> your application’s environment
> 
> all right !
> 
> Ruby version 1.8.7 (i686-darwin10.0.0)

I’m having this same issue, but on Apache with Rails 3 Beta 3. I noticed  
that your Ruby version is now 1.8.7 and not 1.9.2. I’m trying to figure  
out how to get past the “no such file to load – rack” issue while  
keeping Ruby 1.9.2.

I tried your approach of changing passenger\_ruby to the home directory  
instead of using the “ruby 1.9.2-head” directory but my home directory  
is empty. I installed RVM via git so the closest matching folder I can  
find is in /root/.rvm/src/rvm/bin/ but I don’t have a passenger\_ruby  
file in there.

I’ve tried everything I’ve found on Google as possible solutions and  
can’t get it to work.

Any advice?  
Thanks  
Bobby

---

<div class="post-metadata">

**Author:** ![jsakuma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c4cdca/32.png) [@jsakuma](https://www.ruby-forum.com/u/jsakuma)\
**Post date:** [April 28, 2010, 4:13am UTC](https://www.ruby-forum.com/t/rails-3-b2-nginx-report-error-no-such-file-to-load-rack/186313/5 "2010-04-28T04:13:51Z")

</div>

nevermind, got it working. Once I fully understood all of these  
directions: [http://rvm.beginrescueend.com/integration/passenger/](http://rvm.beginrescueend.com/integration/passenger/) I got  
it working. Needed to make sure that PassengerRuby was pointed to  
something like: /home/wayne/.rvm/bin/passenger\_ruby instead of the RVM  
ruby

---

<div class="post-metadata">

**Author:** ![jsakuma](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/c4cdca/32.png) [@jsakuma](https://www.ruby-forum.com/u/jsakuma)\
**Post date:** [April 5, 2010, 8:49am UTC](https://www.ruby-forum.com/t/rails-3-b2-nginx-report-error-no-such-file-to-load-rack/186313/6 "2010-04-05T08:49:23Z")

</div>

Conrad T. wrote:

> Hi, did you add the rack gem to your gem file?
> 
> -Conrad
> 
> Sent from my iPhone

Hi, Conrad

I find method of solution about “no such file to load – rack”

[http://rvm.beginrescueend.com/integration/passenger/](http://rvm.beginrescueend.com/integration/passenger/)

=========================================

in /opt/nginx/conf/nginx.conf

passenger\_ruby /home/wayne/.rvm/bin/passenger\_ruby;

instead of

you current ruby version as “ruby 1.9.2-head…”

=========================================

and then when I input localhost:3002 in browser and click link - \> About  
your application’s environment

all right !

Ruby version 1.8.7 (i686-darwin10.0.0)  
RubyGems version 1.3.6  
Rack version 1.1  
Rails version 3.0.0.beta2  
Active Record version 3.0.0.beta2  
Action Pack version 3.0.0.beta2  
Active Resource version 3.0.0.beta2  
Action Mailer version 3.0.0.beta2  
Active Support version 3.0.0.beta2  
Middleware  
ActionDispatch::Static  
Rack::Lock  
Rack::Runtime  
Rails::Rack::Logger  
ActionDispatch::ShowExceptions  
ActionDispatch::RemoteIp  
Rack::Sendfile  
ActionDispatch::Callbacks  
ActionDispatch::Cookies  
ActionDispatch::Session::CookieStore  
ActionDispatch::Flash  
ActionDispatch::ParamsParser  
Rack::MethodOverride  
ActionDispatch::Head  
ActiveRecord::ConnectionAdapters::ConnectionManagement  
ActiveRecord::QueryCache  
Application root /Users/shajun/project\_ree/testapp  
Environment development  
Database adapter postgresql  
Database schema version 0