Application Error (app crash in heroku)

Question

I just deployed an updated version of my code into heroku but I'm getting this error. It was working fine locally so I thought it was safe. Anyone know what went wrong? In terms of new gems, I installed twitter and oauth gems. I got rid of them just now, but still getting the same app crash.

Here's the heroku log

C:\Users\app5>heroku restart
Restarting processes... done



    C:\Users\app5>heroku logs
2013-04-09T03:34:10.422084+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/initializable.rb:55:in `block in run_initialize
rs'
2013-04-09T03:34:10.422084+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `each'
2013-04-09T03:34:10.421854+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/engine.rb:436:in `eager_load!'
2013-04-09T03:34:10.421854+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/application/finisher.rb:53:in `block in <module
:Finisher>'
2013-04-09T03:34:10.421854+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `instance_exec'
2013-04-09T03:34:10.422084+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing'
2013-04-09T03:34:10.422084+00:00 app[web.1]:    from /app/config/environment.rb:
7:in `<top (required)>'
2013-04-09T03:34:10.422084+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
2013-04-09T03:34:10.422084+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `block in
require'
2013-04-09T03:34:10.422084+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_depe
ndency'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/config.ru:3:in `block
in <main>'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/config.ru:in `new'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/config.ru:in `<main>'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'
2013-04-09T03:34:10.422542+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands/server.rb:46:in `app'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'
2013-04-09T03:34:10.422320+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'
2013-04-09T03:34:10.422542+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'
2013-04-09T03:34:10.422542+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands/server.rb:70:in `start'
2013-04-09T03:34:10.422542+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands.rb:55:in `block in <top (required)>'
2013-04-09T03:34:10.422542+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands.rb:50:in `tap'
2013-04-09T03:34:10.422542+00:00 app[web.1]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands.rb:50:in `<top (required)>'
2013-04-09T03:34:10.422542+00:00 app[web.1]:    from script/rails:6:in `require'

2013-04-09T03:34:10.422542+00:00 app[web.1]:    from script/rails:6:in `<main>'
2013-04-09T03:34:11.642431+00:00 heroku[web.1]: Process exited with status 1
2013-04-09T03:34:11.659334+00:00 heroku[web.1]: State changed from starting to c
rashed
2013-04-09T03:34:12.186269+00:00 app[web.2]:         SECURITY WARNING: No secret
 option provided to Rack::Session::Cookie.
2013-04-09T03:34:12.186269+00:00 app[web.2]:         provide a secret to prevent
 exploits that may be possible from crafted
2013-04-09T03:34:12.186269+00:00 app[web.2]:         cookies. This will not be s
upported in future versions of Rack, and
2013-04-09T03:34:12.186269+00:00 app[web.2]:         This poses a security threa
t. It is strongly recommended that you
2013-04-09T03:34:12.186269+00:00 app[web.2]:         future versions will even i
nvalidate your existing user cookies.
2013-04-09T03:34:12.186269+00:00 app[web.2]:         Called from: /app/vendor/bu
ndle/ruby/1.9.1/gems/actionpack-3.2.3/lib/action_dispatch/middleware/session/abs
tract_store.rb:28:in `initialize'.
2013-04-09T03:34:12.186269+00:00 app[web.2]:
2013-04-09T03:34:12.186269+00:00 app[web.2]:
2013-04-09T03:34:16.249332+00:00 app[web.2]: => Booting WEBrick
2013-04-09T03:34:16.249332+00:00 app[web.2]: => Rails 3.2.3 application starting
 in production on http://0.0.0.0:24777
2013-04-09T03:34:16.249516+00:00 app[web.2]: Exiting
2013-04-09T03:34:16.249948+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `block in
require'
2013-04-09T03:34:16.250053+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_depe
ndency'
2013-04-09T03:34:16.249332+00:00 app[web.2]: => Ctrl-C to shutdown server
2013-04-09T03:34:16.249766+00:00 app[web.2]: /app/app/controllers/comments_contr
oller.rb:1:in `<top (required)>': superclass mismatch for class CommentsControll
er (TypeError)
2013-04-09T03:34:16.250225+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:359:in `require_o
r_load'
2013-04-09T03:34:16.250140+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
2013-04-09T03:34:16.250419+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:313:in `depend_on
'
2013-04-09T03:34:16.249332+00:00 app[web.2]: => Call with -d to detach
2013-04-09T03:34:16.250629+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/engine.rb:439:in `block (2 levels) in eager_loa
d!'
2013-04-09T03:34:16.250717+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/engine.rb:438:in `each'
2013-04-09T03:34:16.250804+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/engine.rb:438:in `block in eager_load!'
2013-04-09T03:34:16.250889+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/engine.rb:436:in `each'
2013-04-09T03:34:16.251036+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/engine.rb:436:in `eager_load!'
2013-04-09T03:34:16.251210+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `instance_exec'
2013-04-09T03:34:16.249861+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
2013-04-09T03:34:16.252214+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `each'
2013-04-09T03:34:16.251418+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/initializable.rb:55:in `block in run_initialize
rs'
2013-04-09T03:34:16.251294+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `run'
2013-04-09T03:34:16.253756+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'
2013-04-09T03:34:16.254594+00:00 app[web.2]:    from script/rails:6:in `require'

2013-04-09T03:34:16.250509+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:225:in `require_d
ependency'
2013-04-09T03:34:16.252784+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `block in
require'
2013-04-09T03:34:16.253016+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
2013-04-09T03:34:16.253420+00:00 app[web.2]:    from /app/config.ru:in `new'
2013-04-09T03:34:16.252874+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_depe
ndency'
2013-04-09T03:34:16.253243+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
2013-04-09T03:34:16.252657+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require'
2013-04-09T03:34:16.253333+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
2013-04-09T03:34:16.254035+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'
2013-04-09T03:34:16.253588+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'
2013-04-09T03:34:16.254207+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands/server.rb:70:in `start'
2013-04-09T03:34:16.254509+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands.rb:50:in `<top (required)>'
2013-04-09T03:34:16.252302+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `run_initializers'
2013-04-09T03:34:16.252402+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/application.rb:136:in `initialize!'
2013-04-09T03:34:16.251126+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/application/finisher.rb:53:in `block in <module
:Finisher>'
2013-04-09T03:34:16.253672+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'
2013-04-09T03:34:16.252571+00:00 app[web.2]:    from /app/config/environment.rb:
7:in `<top (required)>'
2013-04-09T03:34:16.252488+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing'
2013-04-09T03:34:16.253116+00:00 app[web.2]:    from /app/config.ru:3:in `block
in <main>'
2013-04-09T03:34:16.253875+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands/server.rb:46:in `app'
2013-04-09T03:34:16.253504+00:00 app[web.2]:    from /app/config.ru:in `<main>'
2013-04-09T03:34:16.254123+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'
2013-04-09T03:34:16.254292+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands.rb:55:in `block in <top (required)>'
2013-04-09T03:34:16.254376+00:00 app[web.2]:    from /app/vendor/bundle/ruby/1.9
.1/gems/railties-3.2.3/lib/rails/commands.rb:50:in `tap'
2013-04-09T03:34:16.254842+00:00 app[web.2]:    from script/rails:6:in `<main>'
2013-04-09T03:34:17.704246+00:00 heroku[web.2]: Process exited with status 1
2013-04-09T03:34:17.719603+00:00 heroku[web.2]: State changed from starting to c
rashed
2013-04-09T03:35:06.060820+00:00 heroku[router]: at=error code=H10 desc="App cra
shed" method=GET path=/ host=appname.com fwd="xx.xx.xx.xxx" dyno= connect= service
= status=503 bytes=

Gemfile.lock file

GEM
  remote: https://rubygems.org/
  specs:
    actionmailer (3.2.3)
      actionpack (= 3.2.3)
      mail (~> 2.4.4)
    actionpack (3.2.3)
      activemodel (= 3.2.3)
      activesupport (= 3.2.3)
      builder (~> 3.0.0)
      erubis (~> 2.7.0)
      journey (~> 1.0.1)
      rack (~> 1.4.0)
      rack-cache (~> 1.2)
      rack-test (~> 0.6.1)
      sprockets (~> 2.1.2)
    activeadmin (0.5.1)
      arbre (>= 1.0.1)
      bourbon (>= 1.0.0)
      devise (>= 1.1.2)
      fastercsv
      formtastic (>= 2.0.0)
      inherited_resources (>= 1.3.1)
      jquery-rails (>= 1.0.0)
      kaminari (>= 0.13.0)
      meta_search (>= 0.9.2)
      rails (>= 3.0.0)
      sass (>= 3.1.0)
    activemodel (3.2.3)
      activesupport (= 3.2.3)
      builder (~> 3.0.0)
    activerecord (3.2.3)
      activemodel (= 3.2.3)
      activesupport (= 3.2.3)
      arel (~> 3.0.2)
      tzinfo (~> 0.3.29)
    activeresource (3.2.3)
      activemodel (= 3.2.3)
      activesupport (= 3.2.3)
    activesupport (3.2.3)
      i18n (~> 0.6)
      multi_json (~> 1.0)
    addressable (2.2.8)
    arbre (1.0.1)
      activesupport (>= 3.0.0)
    arel (3.0.2)
    bcrypt-ruby (3.0.1)
    bcrypt-ruby (3.0.1-x86-mingw32)
    bootstrap-sass (2.1.0.0)
    bootstrap-will_paginate (0.0.5)
      will_paginate
    bourbon (3.1.1)
      sass (>= 3.2.0)
      thor
    builder (3.0.4)
    capybara (1.1.2)
      mime-types (>= 1.16)
      nokogiri (>= 1.3.3)
      rack (>= 1.0.0)
      rack-test (>= 0.5.4)
      selenium-webdriver (~> 2.0)
      xpath (~> 0.1.4)
    carrierwave (0.8.0)
      activemodel (>= 3.2.0)
      activesupport (>= 3.2.0)
    childprocess (0.3.9)
      ffi (~> 1.0, >= 1.0.11)
    coderay (1.0.9)
    coffee-rails (3.2.2)
      coffee-script (>= 2.2.0)
      railties (~> 3.2.0)
    coffee-script (2.2.0)
      coffee-script-source
      execjs
    coffee-script-source (1.6.1)
    cucumber (1.2.2)
      builder (>= 2.1.2)
      diff-lcs (>= 1.1.3)
      gherkin (~> 2.11.6)
      multi_json (~> 1.3)
    cucumber-rails (1.2.1)
      capybara (>= 1.1.2)
      cucumber (>= 1.1.3)
      nokogiri (>= 1.5.0)
    database_cleaner (0.7.0)
    devise (2.2.3)
      bcrypt-ruby (~> 3.0)
      orm_adapter (~> 0.1)
      railties (~> 3.1)
      warden (~> 1.2.1)
    diff-lcs (1.1.3)
    erubis (2.7.0)
    excon (0.13.4)
    execjs (1.4.0)
      multi_json (~> 1.0)
    factory_girl (2.3.2)
      activesupport
    factory_girl_rails (1.4.0)
      factory_girl (~> 2.3.0)
      railties (>= 3.0.0)
    faker (1.0.1)
      i18n (~> 0.4)
    fastercsv (1.5.5)
    ffi (1.4.0)
    ffi (1.4.0-x86-mingw32)
    fog (1.3.1)
      builder
      excon (~> 0.13.0)
      formatador (~> 0.2.0)
      mime-types
      multi_json (~> 1.0)
      net-scp (~> 1.0.4)
      net-ssh (>= 2.1.3)
      nokogiri (~> 1.5.0)
      ruby-hmac
    formatador (0.2.4)
    formtastic (2.2.1)
      actionpack (>= 3.0)
    friendly_id (4.0.9)
    gherkin (2.11.6)
      json (>= 1.7.6)
    gherkin (2.11.6-x86-mingw32)
      json (>= 1.7.6)
    growl (1.0.3)
    guard (1.6.2)
      listen (>= 0.6.0)
      lumberjack (>= 1.0.2)
      pry (>= 0.9.10)
      terminal-table (>= 1.4.3)
      thor (>= 0.14.6)
    guard-rspec (0.5.5)
      guard (>= 0.8.4)
    guard-spork (0.3.2)
      guard (>= 0.8.4)
      spork (>= 0.8.4)
    has_scope (0.5.1)
    hike (1.2.1)
    httpclient (2.3.3)
    i18n (0.6.4)
    impressionist (1.2.0)
      httpclient (~> 2.2)
      nokogiri (~> 1.5)
    inherited_resources (1.3.1)
      has_scope (~> 0.5.0)
      responders (~> 0.6)
    journey (1.0.4)
    jquery-rails (2.0.2)
      railties (>= 3.2.0, < 5.0)
      thor (~> 0.14)
    json (1.7.7)
    kaminari (0.14.1)
      actionpack (>= 3.0.0)
      activesupport (>= 3.0.0)
    launchy (2.1.0)
      addressable (~> 2.2.6)
    listen (0.7.3)
    lumberjack (1.0.2)
    mail (2.4.4)
      i18n (>= 0.4.0)
      mime-types (~> 1.16)
      treetop (~> 1.4.8)
    meta_search (1.1.3)
      actionpack (~> 3.1)
      activerecord (~> 3.1)
      activesupport (~> 3.1)
      polyamorous (~> 0.5.0)
    method_source (0.8.1)
    mime-types (1.21)
    mini_magick (3.5.0)
      subexec (~> 0.2.1)
    multi_json (1.6.1)
    net-scp (1.0.4)
      net-ssh (>= 1.99.1)
    net-ssh (2.6.6)
    nokogiri (1.5.6)
    nokogiri (1.5.6-x86-mingw32)
    orm_adapter (0.4.0)
    pg (0.12.2)
    pg (0.12.2-x86-mingw32)
    polyamorous (0.5.0)
      activerecord (~> 3.0)
    polyglot (0.3.3)
    pr_geohash (1.0.0)
    pry (0.9.12)
      coderay (~> 1.0.5)
      method_source (~> 0.8)
      slop (~> 3.4)
    pry (0.9.12-x86-mingw32)
      coderay (~> 1.0.5)
      method_source (~> 0.8)
      slop (~> 3.4)
      win32console (~> 1.3)
    rack (1.4.5)
    rack-cache (1.2)
      rack (>= 0.4)
    rack-ssl (1.3.3)
      rack
    rack-test (0.6.2)
      rack (>= 1.0)
    rails (3.2.3)
      actionmailer (= 3.2.3)
      actionpack (= 3.2.3)
      activerecord (= 3.2.3)
      activeresource (= 3.2.3)
      activesupport (= 3.2.3)
      bundler (~> 1.0)
      railties (= 3.2.3)
    railties (3.2.3)
      actionpack (= 3.2.3)
      activesupport (= 3.2.3)
      rack-ssl (~> 1.3.2)
      rake (>= 0.8.7)
      rdoc (~> 3.4)
      thor (~> 0.14.6)
    rake (10.0.3)
    rb-fsevent (0.4.3.1)
    rdoc (3.12.2)
      json (~> 1.4)
    responders (0.9.3)
      railties (~> 3.1)
    rinku (1.7.2)
    rsolr (1.0.8)
      builder (>= 2.1.2)
    rspec (2.9.0)
      rspec-core (~> 2.9.0)
      rspec-expectations (~> 2.9.0)
      rspec-mocks (~> 2.9.0)
    rspec-core (2.9.0)
    rspec-expectations (2.9.1)
      diff-lcs (~> 1.1.3)
    rspec-mocks (2.9.0)
    rspec-rails (2.9.0)
      actionpack (>= 3.0)
      activesupport (>= 3.0)
      railties (>= 3.0)
      rspec (~> 2.9.0)
    ruby-hmac (0.4.0)
    rubyzip (0.9.9)
    sass (3.2.6)
    sass-rails (3.2.5)
      railties (~> 3.2.0)
      sass (>= 3.1.10)
      tilt (~> 1.3)
    selenium-webdriver (2.31.0)
      childprocess (>= 0.2.5)
      multi_json (~> 1.0)
      rubyzip
      websocket (~> 1.0.4)
    slop (3.4.3)
    spork (0.9.0)
    spork (0.9.0-x86-mingw32)
      win32-process
    sprockets (2.1.3)
      hike (~> 1.2)
      rack (~> 1.0)
      tilt (~> 1.1, != 1.3.0)
    sqlite3 (1.3.5)
    sqlite3 (1.3.5-x86-mingw32)
    subexec (0.2.2)
    sunspot (2.0.0)
      pr_geohash (~> 1.0)
      rsolr (~> 1.0.7)
    sunspot_rails (2.0.0)
      nokogiri
      sunspot (= 2.0.0)
    sunspot_solr (2.0.0)
    terminal-table (1.4.5)
    thor (0.14.6)
    tilt (1.3.4)
    treetop (1.4.12)
      polyglot
      polyglot (>= 0.3.1)
    tzinfo (0.3.36)
    uglifier (1.2.3)
      execjs (>= 0.3.0)
      multi_json (>= 1.0.2)
    warden (1.2.1)
      rack (>= 1.0)
    websocket (1.0.7)
    will_paginate (3.0.3)
    win32-process (0.7.1)
      ffi (>= 1.0.0)
    win32console (1.3.2-x86-mingw32)
    xpath (0.1.4)
      nokogiri (~> 1.3)

PLATFORMS
  ruby
  x86-mingw32

DEPENDENCIES
  activeadmin
  bcrypt-ruby (= 3.0.1)
  bootstrap-sass (= 2.1)
  bootstrap-will_paginate (= 0.0.5)
  capybara (= 1.1.2)
  carrierwave
  coffee-rails (= 3.2.2)
  cucumber-rails (= 1.2.1)
  database_cleaner (= 0.7.0)
  factory_girl_rails (= 1.4.0)
  faker (= 1.0.1)
  fog (~> 1.3.1)
  friendly_id
  growl (= 1.0.3)
  guard-rspec (= 0.5.5)
  guard-spork (= 0.3.2)
  impressionist
  jquery-rails (= 2.0.2)
  launchy (= 2.1.0)
  meta_search (>= 1.1.0.pre)
  mini_magick
  pg (= 0.12.2)
  rails (= 3.2.3)
  rb-fsevent (= 0.4.3.1)
  rinku (~> 1.7.2)
  rspec-rails (= 2.9.0)
  sass-rails (= 3.2.5)
  simple-private-messages (= 0.0.0)!
  spork (= 0.9.0)
  sqlite3 (= 1.3.5)
  sunspot_rails
  sunspot_solr
  uglifier (= 1.2.3)
  will_paginate (= 3.0.3)

Answer 1

This usually means you've redefined a class unintentionally, perhaps by attempting to reopen the class after defining it elsewhere in your app. Try searching your app for class CommentsController... if it shows up more than once and it is intended, you'll want to make sure all usages inherit from the same parent class. I assume it should be class CommentsController < ApplicationController... in each usage.