Cannot Start thin server Ruby Gem - ruby

Question

I am trying to setup redmine on my server which is Redhat 6.2
I intend it to run with Nginx using thin ruby gem.
I was following http://www.redmine.org/projects/redmine/wiki/HowTo_configure_Nginx_to_run_Redmine
I did following things
gem install thin
thin install
this gives me init script under /etc/rc.d/thin The YML file config is as follows:
---
chdir: /app/redmine-root/
environment: development
address: 0.0.0.0
port: 5000
timeout: 30
log: log/thin.log
pid: tmp/pids/thin.pid
max_conns: 1024
max_persistent_conns: 100
require: []
wait: 30
servers: 4
daemonize: true
Now when I do /etc/rc.d/thin start it shows
Starting server on 0.0.0.0:5000 ...
Starting server on 0.0.0.0:5001 ...
Starting server on 0.0.0.0:5002 ...
Starting server on 0.0.0.0:5003 ...
but when I see pids under /app/redmine-root/tmp/pids there are no Pids.
therefore, I can't see any service running. This is issue number 1
Second thing I'd like to ask that, in Nginx conf as suggested by the above link the upstream block is like as follows:
upstream thin_cluster {
server unix:/tmp/thin.0.sock;
server unix:/tmp/thin.1.sock;
server unix:/tmp/thin.2.sock;
server unix:/tmp/thin.3.sock;
}
But the pid file is in /app/redmine-root/tmp/pids should this work?
Third, At the time of Install I marked the env as production
RAILS_ENV=production rake db:migrate
But whenever I do thin config -C /etc/thin/redmine.yml it changes to development.
Please note that I have RVM also. And the user & owner of /app/redmine-root/ is apache.
My nginx runs with apache and I am trying to run thin also as apache.
I have no background in Ruby. Any help is much appreciated.
EDIT
After suggestions, I found this in log.
/usr/local/lib/ruby/gems/2.0.0/gems/thin-1.5.1/lib/thin/backends/tcp_server.rb:16:in `connect': cannot load such file -- thin/connection (LoadError)
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.5.1/lib/thin/backends/base.rb:55:in `block in start'
from /usr/local/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `call'
from /usr/local/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run_machine'
from /usr/local/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.5.1/lib/thin/backends/base.rb:63:in `start'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.5.1/lib/thin/server.rb:159:in `start'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.5.1/lib/thin/controllers/controller.rb:86:in `start'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.5.1/lib/thin/runner.rb:187:in `run_command'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.5.1/lib/thin/runner.rb:152:in `run!'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.5.1/bin/thin:6:in `<top (required)>'
from /usr/local/bin/thin:23:in `load'
from /usr/local/bin/thin:23:in `<main>'
is it because, I am trying to configure on UNIX socket or its something else??

Answer 1

You should add gem thin to your Gemfile
PS: see at https://github.com/macournoyer/thin/issues/115 for example.