Rails server not running - 504 Gateway Timeout error

My Unicorn Server Log

/home/rails/releases/20140726114415/config/boot.rb:4:in `<top (required)>'
/usr/loc
config.ru:1:in `new'
config.ru:1:in `<main>'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn.rb:48:in `eval'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn.rb:48:in `block in builder'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn/http_server.rb:750:in `call'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn/http_server.rb:750:in `build_app!'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn/http_server.rb:623:in `init_worker_process'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn/http_server.rb:643:in `worker_loop'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn/http_server.rb:527:in `spawn_missing_workers'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn/http_server.rb:538:in `maintain_worker_count'
/usr/local/rvm/gems/ruby-2.0.0-p353/gems/unicorn-4.7.0/lib/unicorn/http_server.rb:303:in `join'
/usr/local/rvm/gems/ruby-2`enter code here`.0.0-p353/gems/unicorn-4.7.0/bin/unicorn:126:in `<top (required)>'
/usr/local/rvm/gems/ruby-2.0.0-p353/bin/unicorn:23:in `load'
/usr/local/rvm/gems/ruby-2.0.0-p353/bin/unicorn:23:in `<main>'
/usr/local/rvm/gems/ruby-2.0.0-p353/bin/ruby_executable_hooks:15:in `eval'
/usr/local/rvm/gems/ruby-2.0.0-p353/bin/ruby_executable_hooks:15:in `<main>'
E, [2014-07-26T11:59:07.161500 #24415] ERROR -- : reaped #<Process::Status: pid 29887 exit 1> worker=0
I, [2014-07-26T11:59:07.161888 #24415]  INFO -- : worker=0 spawning...
E, [2014-07-26T11:59:07.162737 #24415] ERROR -- : reaped #<Process::Status: pid 29885 exit 1> worker=1
I, [2014-07-26T11:59:07.163084 #24415]  INFO -- : worker=1 spawning...
I, [2014-07-26T11:59:07.164414 #29891]  INFO -- : worker=0 spawned pid=29891
I, [2014-07-26T11:59:07.167923 #29893]  INFO -- : worker=1 spawned pid=29893
I, [2014-07-26T11:59:07.186676 #29891]  INFO -- : Refreshing Gem list
I, [2014-07-26T11:59:07.188107 #29893]  INFO -- : Refreshing Gem list

According to Research CPU usage is not proper