如何在增加急切加载的同时解决此错误？ “错误ThreadError：尝试解锁由另一个线程锁定的互斥锁”

我的Rails应用程序使用 inherited_resources gem . 我目前正在努力加快速度，以便能够处理更大的数据集 . 所以我前进（在Bullet宝石的帮助下）使用热切的加载，它会证明是有用的 . 在inherited_resources中，它看起来像这样：

def collection
  my_widgets ||= end_of_association_chain.includes(:association_one, :association_two, :association_three, :association_four)

  @widgets = case params[:filter]
                  when nil then my_widgets.all
                  when 'old' then my_widgets.old
                  when 'new' then my_widgets.new
                  end

  @final_collection
end

新代码是 .includes(:association_one, :association_two, :association_three, :association_four)

对于我的测试庞大的数据库，这个简单的更改加快了我在日志中的加载时间约5倍 . 但是，浏览器只会坐在那里，空白 . 没有 . 随着chrome加载图标去 .

当我终止终端中的服务器时，我得到了这个相当独特的错误：

ERROR ThreadError: Attempt to unlock a mutex which is locked by another thread

Backtrace在底部 .

我已经尝试了在这个问题的最佳答案中讨论的解决方案：How can I serve requests concurrently with Rails 4?，具有以下内容：

#config/environments/development.rb
config.cache_classes = false
config.eager_load = true
config.allow_concurrency=true

我在这里想念的是什么？为什么简单地将这些关联添加到急切加载中，这显着加速了幕后的事情，这使得我对这个ThreadError没有响应的浏览器？

/Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/lock.rb:22:in `unlock'
    /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/lock.rb:22:in `ensure in call'
    /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/lock.rb:23:in `call'
    /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/content_length.rb:15:in `call'
    /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/handler/webrick.rb:88:in `service'
    /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
    /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
    /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'
/Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/handler/webrick.rb:48:in `shutdown': undefined method `shutdown' for nil:NilClass (NoMethodError)
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:280:in `block in start'
    from /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:206:in `call'
    from /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:206:in `join'
    from /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:206:in `block (2 levels) in start'
    from /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:206:in `each'
    from /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:206:in `block in start'
    from /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:32:in `start'
    from /Users/johndoeuser/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:162:in `start'
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/handler/webrick.rb:34:in `run'
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:286:in `start'
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/railties-4.2.6/lib/rails/commands/server.rb:80:in `start'
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:80:in `block in server'
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /Users/johndoeuser/.rvm/gems/ruby-2.2.1/gems/railties-4.2.6/lib/rails/commands.rb:17:in `'
    from bin/rails:4:in `require'
    from bin/rails:4:in `'

编辑：我开始怀疑这是不是一个线程错误，而不是我的数据集太大而不能进行预先加载，是否有一个阈值，你渴望加载这么多的对象，当它在终端中快速加载时，浏览器只是永远坐在那里？