Question

我有一个非常奇怪的错误，我需要一些线索。考虑一下：

class ApplicationController < ActionController::Base
  before_filter :set_timezone

  def set_timezone
    if logged_in?
      Time.zone = current_user.time_zone
    end
  end

当PayPal尝试发送通知时，它会像这样进来：

Started POST "/ipn_subscription_notifications" for 173.0.82.126 at 2012-03-15 04:11:45 -0400
  Processing by IpnSubscriptionNotificationsController#create as HTML
  Parameters: {"txn_type"=>"subscr_signup", etc...

在这里它被挂断了。 Ruby开始咀嚼内存直到机器崩溃。这是修复：

def set_timezone
  if current_user
    Time.zone = current_user.time_zone
  end
end

让我们看一下logged_in?：

module AuthenticatedSystem
  def logged_in?
    current_user ? true : false
  end

这在逻辑上等同于修复。

我怀疑错误被抛出并被捕获，有人正在重启请求过程。 AuthenticatedSystem当然是可疑的。

这在开发环境中不会发生，它会抛出错误并返回500：

Started POST "/ipn_subscription_notifications" for 127.0.0.1 at 2012-03-15 15:19:39 -0700
  Processing by IpnSubscriptionNotificationsController#create as */*
  Parameters: {"foobar"=>nil}
Completed 500 Internal Server Error in 9ms

NoMethodError (undefined method `logged_in?' for #<IpnSubscriptionNotificationsController:0xdfdaaf4>):
  app/controllers/application_controller.rb:8:in `set_timezone'

Rendered /usr/local/rvm/gems/ruby-1.9.2-p180@ce2/gems/actionpack-3.1.0/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.3ms)
Rendered /usr/local/rvm/gems/ruby-1.9.2-p180@ce2/gems/actionpack-3.1.0/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms)
Rendered /usr/local/rvm/gems/ruby-1.9.2-p180@ce2/gems/actionpack-3.1.0/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (4.8ms)
[2012-03-15 15:19:40] ERROR Errno::ECONNRESET: Connection reset by peer
  /usr/local/rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:56:in `eof?'
  /usr/local/rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:56:in `run'
  /usr/local/rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'

检测此类故障并优雅地处理它是我的目标。

有什么想法吗？我可以检测Passenger或Rails堆栈的其他部分吗？

Answer 1

错误是未定义的方法logged_in？在你的IpnSubscriptionNotificationsController中，这个控制器继承自ApplicationController，你肯定在ApplicationController中包含AuthenticatedSystem模块，可能你可以先试试这个

Answer 2

可能这不能解决您的问题，但您应该使用around_filter：set_timezone而不是过滤器之前。看看这个：http://www.elabs.se/blog/36-working-with-time-zones-in-ruby-on-rails#working_with_multiple_user_time_zones

无提示ruby / rails故障导致它占用所有内存并使服务器崩溃

2 个答案: