Amazon EC2 上 Sinatra 应用程序的乘客抛出错误答案

【问题标题】：Passenger throwing error for Sinatra app on Amazon EC2Amazon EC2 上 Sinatra 应用程序的乘客抛出错误
【发布时间】：2015-01-20 05:35:44
【问题描述】：

我尝试在 Amazon EC2 实例上使用 Sinatra 应用程序启动Passenger，但出现以下错误：

    $ passenger start -e production
    =============== Phusion Passenger Standalone web server started ===============
    PID file: /home/ec2-user/github/mainpage/tmp/pids/passenger.3000.pid
    Log file: /home/ec2-user/github/mainpage/log/passenger.3000.log
    Environment: production
    Accessible via: http://0.0.0.0:3000/

    You can stop Phusion Passenger Standalone by pressing Ctrl-C.
    Problems? Check https://www.phusionpassenger.com/documentation/Users%20guide%20Standalone.html#troubleshooting
    ===============================================================================
    App 29028 stdout: 
    App 29028 stdout: 
    [ 2015-01-20 05:16:52.8259 28997/7fb5c6463700 Pool2/Implementation.cpp:287 ]: Could not spawn process for application /home/ec2-user/github/mainpage: An error occured while starting up the preloader.
      Error ID: 0ad6d346
      Error details saved to: /tmp/passenger-error-911MCI.html
      Message from application: cannot load such file -- json (LoadError)
      /home/ec2-user/.gem/ruby/2.0/gems/mime-types-2.4.3/lib/mime/type.rb:4:in `require'
      /home/ec2-user/.gem/ruby/2.0/gems/mime-types-2.4.3/lib/mime/type.rb:4:in `<top (required)>'
      /home/ec2-user/.gem/ruby/2.0/gems/mime-types-2.4.3/lib/mime/types.rb:3:in `require'
      /home/ec2-user/.gem/ruby/2.0/gems/mime-types-2.4.3/lib/mime/types.rb:3:in `<top (required)>'
      /home/ec2-user/.gem/ruby/2.0/gems/mail-2.6.3/lib/mail.rb:9:in `require'
      /home/ec2-user/.gem/ruby/2.0/gems/mail-2.6.3/lib/mail.rb:9:in `<module:Mail>'
      /home/ec2-user/.gem/ruby/2.0/gems/mail-2.6.3/lib/mail.rb:2:in `<top (required)>'
      /home/ec2-user/.gem/ruby/2.0/gems/pony-1.11/lib/pony.rb:1:in `require'
      /home/ec2-user/.gem/ruby/2.0/gems/pony-1.11/lib/pony.rb:1:in `<top (required)>'
      /home/ec2-user/github/mainpage/app.rb:9:in `require'
      /home/ec2-user/github/mainpage/app.rb:9:in `<top (required)>'
      config.ru:1:in `require'
      config.ru:1:in `block in <main>'
      /home/ec2-user/.gem/ruby/2.0/gems/rack-1.6.0/lib/rack/builder.rb:55:in `instance_eval'
      /home/ec2-user/.gem/ruby/2.0/gems/rack-1.6.0/lib/rack/builder.rb:55:in `initialize'
      config.ru:1:in `new'
      config.ru:1:in `<main>'
      /home/ec2-user/.gem/ruby/2.0/gems/passenger-4.0.57/helper-scripts/rack-preloader.rb:112:in `eval'
      /home/ec2-user/.gem/ruby/2.0/gems/passenger-4.0.57/helper-scripts/rack-preloader.rb:112:in `preload_app'
      /home/ec2-user/.gem/ruby/2.0/gems/passenger-4.0.57/helper-scripts/rack-preloader.rb:158:in `<module:App>'
      /home/ec2-user/.gem/ruby/2.0/gems/passenger-4.0.57/helper-scripts/rack-preloader.rb:29:in `<module:PhusionPassenger>'
      /home/ec2-user/.gem/ruby/2.0/gems/passenger-4.0.57/helper-scripts/rack-preloader.rb:28:in `<main>'


    [ 2015-01-20 05:16:52.8332 28997/7fb5bffff700 agents/HelperAgent/RequestHandler.h:2306 ]: [Client 20] Cannot checkout session because a spawning error occurred. The identifier of the error is 0ad6d346. Please see earlier logs for details about the error.

这是我的 config.ru 文件：

require './app'
run Sinatra::Application

还有我的 gem 文件：

来源'https://rubygems.org'

source 'https://rubygems.org'

gem 'sinatra'
gem 'nokogiri'
gem 'pony'
gem 'passenger'

错误与json有关吗？我尝试安装 json gem，但仍然出现此错误。任何帮助将不胜感激。

谢谢。

【问题讨论】：

标签： amazon-ec2 passenger

【解决方案1】：

我终于可以让它工作了.... 我必须手动将gem 'json' 添加到我的 Gemfile 中，然后添加bundle install。阅读错误后，我认为它与小马宝石有关。我猜小马（json gem）的依赖项没有被捆绑程序拾取。

【讨论】：