title: Getting Mixlib::ShellOut::ShellCommandFailed
body: <p>I get the following error while starting one of the instances on OpsWorks. Does anyone have any ideas about this error?</p>
  
  <p>This is printed before the official error announcement (based on request by sethvargo):</p>
  
  <pre><code>[2014-08-13T17:27:08+00:00] INFO: Processing directory[/srv/www/instance/shared/cached-copy] action 
  delete (opsworks_delayed_job::deploy line 48)
  [2014-08-13T17:27:08+00:00] INFO: Processing ruby_block[change HOME to /home/deploy for source checkout] action run (opsworks_delayed_job::deploy line 56)
  [2014-08-13T17:27:08+00:00] INFO: ruby_block[change HOME to /home/deploy for source checkout] called
  [2014-08-13T17:27:08+00:00] INFO: Processing deploy[/srv/www/instance] action deploy (opsworks_delayed_job::deploy line 65)
  [2014-08-13T17:27:09+00:00] INFO: deploy[/srv/www/instance] cloning repo git@github.com:xx/xx.git to /srv/www/instance/shared/cached-copy
  [2014-08-13T17:27:17+00:00] INFO: deploy[/srv/www/instance] checked out branch: master onto: deploy reference: 714153bbb6a37f0484526cf4da3eda4fcd8df977
  [2014-08-13T17:27:17+00:00] INFO: deploy[/srv/www/instance] synchronizing git submodules
  [2014-08-13T17:27:17+00:00] INFO: deploy[/srv/www/instance] enabling git submodules
  [2014-08-13T17:27:18+00:00] INFO: deploy[/srv/www/instance] set user to deploy
  [2014-08-13T17:27:18+00:00] INFO: deploy[/srv/www/instance] set group to www-data
  [2014-08-13T17:27:22+00:00] INFO: deploy[/srv/www/instance] copied the cached checkout to /srv/www/instance/releases/20140813172708
  [2014-08-13T17:27:23+00:00] INFO: deploy[/srv/www/instance] set user to deploy
  [2014-08-13T17:27:23+00:00] INFO: deploy[/srv/www/instance] set group to www-data
  [2014-08-13T17:27:23+00:00] INFO: deploy[/srv/www/instance] running callback before_migrate
  [2014-08-13T17:27:23+00:00] INFO: deploy[/srv/www/instance] created directories before symlinking: tmp,public,config
  [2014-08-13T17:27:23+00:00] INFO: deploy[/srv/www/instance] linked shared paths into current release: system =&gt; public/system, pids =&gt; tmp/pids, log =&gt; log
  [2014-08-13T17:27:23+00:00] INFO: deploy[/srv/www/instance] made pre-migration symlinks
  [2014-08-13T17:27:24+00:00] INFO: deploy[/srv/www/instance] set user to deploy
  [2014-08-13T17:27:24+00:00] INFO: deploy[/srv/www/instance] set group to www-data
  [2014-08-13T17:27:24+00:00] INFO: Gemfile detected. Running bundle install.
  [2014-08-13T17:27:24+00:00] INFO: sudo su - deploy -c 'cd /srv/www/instance/releases/20140813172708 &amp;&amp; /usr/local/bin/bundle install --path /home/deploy/.bundler/instance --without=test development'
  </code></pre>
  
  <p>Here is the error:</p>
  
  <pre><code>================================================================================
  Error executing action `deploy` on resource 'deploy[/srv/www/instance]'
  ================================================================================
  
  
  Mixlib::ShellOut::ShellCommandFailed
  ------------------------------------
  Expected process to exit with [0], but received '127'
  </code></pre>
  
  <p>Cookbook Trace:</p>
  
  <pre><code>Cookbook Trace:
  ---------------
  /var/lib/aws/opsworks/cache.stage2/cookbooks/opsworks_commons/libraries/shellout.rb:8:in `shellout'
  /var/lib/aws/opsworks/cache.stage2/cookbooks/rails/libraries/rails_configuration.rb:41:in `bundle'
  /var/lib/aws/opsworks/cache.stage2/cookbooks/deploy/definitions/opsworks_deploy.rb:103:in `block (3 levels) in from_file'
  </code></pre>
  
  <p>Resource declaration is:</p>
  
  <pre><code>Resource Declaration:
  ---------------------
  # In /var/lib/aws/opsworks/cache.stage2/cookbooks/deploy/definitions/opsworks_deploy.rb
  
  65:     deploy deploy[:deploy_to] do
  66:       provider Chef::Provider::Deploy.const_get(deploy[:chef_provider])
  67:       keep_releases deploy[:keep_releases]
  68:       repository deploy[:scm][:repository]
  69:       user deploy[:user]
  70:       group deploy[:group]
  71:       revision deploy[:scm][:revision]
  72:       migrate deploy[:migrate]
  73:       migration_command deploy[:migrate_command]
  74:       environment deploy[:environment].to_hash
  75:       create_dirs_before_symlink( deploy[:create_dirs_before_symlink] )
  76:       symlink_before_migrate( deploy[:symlink_before_migrate] )
  77:       action deploy[:action]
  78: 
  79:       if deploy[:application_type] == 'rails'
  80:         restart_command "sleep #{deploy[:sleep_before_restart]} &amp;&amp; #{node[:opsworks][:rails_stack][:restart_command]}"
  81:       end
  82: 
  </code></pre>