# \[problem\] mongrel\_cluster and rack 1.0.1

**URL:** <https://www.ruby-forum.com/t/problem-mongrel-cluster-and-rack-1-0-1/184132>\
**Category:** Mongrel\
**Created:** [February 25, 2010, 4:31pm UTC](https://www.ruby-forum.com/t/problem-mongrel-cluster-and-rack-1-0-1/184132 "2010-02-25T16:31:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![typedef](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/f14d63/32.png) [@typedef](https://www.ruby-forum.com/u/typedef)\
**Post date:** [February 25, 2010, 4:31pm UTC](https://www.ruby-forum.com/t/problem-mongrel-cluster-and-rack-1-0-1/184132/1 "2010-02-25T16:31:50Z")

</div>

Hi !

I’m trying to run redmine 0.9.2 (it requires rack 1.0.1) with a  
mongrel\_cluster.

If I run ruby script/server webrick -e production -p 3000, everything is  
ok, redmine runs.

But if I try with mongrel with appropriate conf (mongrel\_cluster.yml is  
a link to /etc/mongrel\_cluster/redmine.yml), I run into some problems :

## $cat /etc/mongrel\_cluster/redmine.yml

group: nginx  
user: mongrel  
log\_file: /var/log/mongrel.log  
address: 127.0.0.1  
port: “8000”  
cwd: /var/www/redmine  
environment: production  
pid\_file: /home/mongrel/pids/mongrel.pid  
servers: 2

$mongrel\_cluster\_ctl start -c /etc/mongrel\_cluster -v  
Starting all mongrel\_clusters…  
mongrel\_rails cluster::start -C redmine.yml -v  
starting port 8000  
mongrel\_rails start -d -e production -a 127.0.0.1 -c /var/www/redmine  
–user mongrel --group nginx -p 8000 -P  
/home/mongrel/pids/mongrel.8000.pid -l /var/log/mongrel.8000.log  
starting port 8001  
mongrel\_rails start -d -e production -a 127.0.0.1 -c /var/www/redmine  
–user mongrel --group nginx -p 8001 -P  
/home/mongrel/pids/mongrel.8001.pid -l /var/log/mongrel.8001.log

$mongrel\_cluster\_ctl status  
Checking all mongrel\_clusters…  
mongrel\_rails cluster::status -C redmine.yml  
missing pid\_file: /home/mongrel/pids/mongrel.8000.pid  
missing mongrel\_rails: port 8000

missing pid\_file: /home/mongrel/pids/mongrel.8001.pid  
missing mongrel\_rails: port 8001  
$cat /var/log/mongrel.8000.log

```
* Daemonized, any open files are closed. Look at

```

/home/mongrel/pids/mongrel.8000.pid and /var/log/mongrel.8000.log for  
info.  
\* Starting Mongrel listening at 127.0.0.1:8000  
\* Initiating groups for “mongrel”:“nginx”.  
\* Changing group to “nginx”.  
\* Changing user to “mongrel”.  
\* Starting Rails with production environment…  
/var/www/redmine/config/…/vendor/rails/railties/lib/initializer.rb:271:in  
`require_frameworks': can't activate rack (= 1.0.0, runtime) for [], already activated rack-1.0.1 for [] (RuntimeError) from /var/www/redmine/config/../vendor/rails/railties/lib/initializer.rb:134:in `process’  
from  
/var/www/redmine/config/…/vendor/rails/railties/lib/initializer.rb:113:in  
`send' from /var/www/redmine/config/../vendor/rails/railties/lib/initializer.rb:113:in `run’  
from /var/www/redmine/config/environment.rb:20  
from /usr/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:31:in  
`gem_original_require' from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require’  
from  
/usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/…/lib/mongrel/rails.rb:147:in  
`rails' from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:113:in `cloaker\_’  
from  
/usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/…/lib/mongrel/configurator.rb:149:in  
`call' from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:149:in `listener’  
from  
/usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel\_rails:99:in  
`cloaker_' from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:50:in `call’  
from  
/usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/…/lib/mongrel/configurator.rb:50:in  
`initialize' from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:84:in `new’  
from  
/usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel\_rails:84:in `run' from /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/command.rb:212:in `run’  
from  
/usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel\_rails:281  
from /usr/bin/mongrel\_rails:19:in `load’  
from /usr/bin/mongrel\_rails:19

$gem list  
actionmailer (2.3.5, 2.3.3, 2.2.2)  
actionpack (2.3.5, 2.3.3, 2.2.2)  
activerecord (2.3.5, 2.3.3, 2.2.2)  
activeresource (2.3.5, 2.3.3, 2.2.2)  
activesupport (2.3.5, 2.3.3, 2.2.2)  
cgi\_multipart\_eof\_fix (2.5.0)  
daemons (1.0.10)  
echoe (4.2)  
fastthread (1.0.7)  
gem\_plugin (0.2.3)  
highline (1.5.2)  
json (1.2.0)  
mongrel (1.1.5)  
mongrel\_cluster (1.0.5)  
net-sftp (2.0.1)  
net-ssh (2.0.6)  
postgres (0.7.9.2008.01.28)  
postgres-pr (0.6.3)  
rack (1.1.0, 1.0.1, 1.0.0)  
rails (2.3.5, 2.3.3, 2.2.2)  
rake (0.8.7, 0.8.3)  
rmagick (2.12.2, 2.8.0)  
rubyforge (2.0.3)  
sqlite3-ruby (1.2.5)

$ruby --version  
ruby 1.8.7 (2010-01-10 patchlevel 249) [i686-linux]

if I try [http://127.0.0.1:8000](http://127.0.0.1:8000), I get an ‘unable to connect’.  
I don’t know if mongrel\_cluster is running ok, I think not from what the  
logs says.  
Is it because mongrel requires rack 1.0.0 and redmine require 1.0.1 ?  
If yes, how can I fix this ?