在本地生产模式下启动Rails服务器
[英]Start rails server in production mode local
问题描述
we have some concurrency issues, that I'd like to reproduce on my machine. 
我们有一些并发问题，我想在我的机器上重现。 On production we have a passenger instance running. 在生产中，我们有一个正在运行的乘客实例。 To get concurrent request, I tried to start the rails app ( Rails 3.2 ) with thin and a threaded option like this: 为了获得并发请求，我尝试使用瘦的和线程化的选项启动rails应用程序（ Rails 3.2 ），如下所示：
bundle exec thin --threaded -p 3000 --threadpool-size 50 start -e production
I also ran RAILS_ENV=production bundle exec rake assets:precompile to get everything like in production. 我还运行了RAILS_ENV=production bundle exec rake assets:precompile以获取生产环境中的所有内容。
However, when I access localhost:3000 in my browser, I get part of the HTML (it displays), but then the browser runs into a timeout with GET http://localhost:3000/ net::ERR_EMPTY_RESPONSE and loading of the page stops. 但是，当我在浏览器中访问localhost:3000时，我得到了HTML的一部分（它显示了），但随后浏览器因GET http://localhost:3000/ net::ERR_EMPTY_RESPONSE而GET http://localhost:3000/ net::ERR_EMPTY_RESPONSE并加载了页面停止。
When I stop thin with Ctrl-C, I get the following message multiple times: 当我用Ctrl-C停止时，我多次收到以下消息：
Unexpected error while processing request: Attempt to unlock a mutex which is not locked
Anybody an idea, why the browser gets a timeout, or how to get concurrent requests working on a local machine with thin? 有人知道为什么浏览器超时，或者如何使并发请求在精简的本地计算机上工作吗？ It would also be no problem to try another server like puma, but a whole apache / passenger installation would be too much. 尝试使用其他服务器（如puma）也没有问题，但是整个apache / passenger安装会太多。
Update 更新
I tried it without the browser, and just do a curl --verbose http://localhost:3000 . 我在没有浏览器的情况下尝试了一下，只做了curl --verbose http://localhost:3000 。 The first time, I get the HTML back: 第一次，我得到了HTML：
* Rebuilt URL to: http://localhost:3000/
* Trying ::1...
* connect to ::1 port 3000 failed: Connection refused
* Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 3000 (#0)
> GET / HTTP/1.1
> Host: localhost:3000
> User-Agent: curl/7.43.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Type: text/html; charset=utf-8
< Content-Length: 88748
< X-UA-Compatible: IE=Edge,chrome=1
< ETag: "d16fa9f8e279774f09c2172988a6d5a6"
< Cache-Control: max-age=0, private, must-revalidate
< Set-Cookie: _session_id=c23af3cc254b66789b635edfefd4a120; path=/; HttpOnly
< X-Request-Id: 539b87c3916cf6733fc9e91a05c4f8e9
< X-Runtime: 0.488556
< Date: Mon, 07 Dec 2015 13:33:26 GMT
< X-Rack-Cache: miss
< Connection: keep-alive
< Server: thin
<
<!DOCTYPE html>
... (more html)
But the second time I run the curl command, it times out: 但是第二次我运行curl命令时，它超时了：
* Rebuilt URL to: http://localhost:3000/
* Trying ::1...
* connect to ::1 port 3000 failed: Connection refused
* Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 3000 (#0)
> GET / HTTP/1.1
> Host: localhost:3000
> User-Agent: curl/7.43.0
> Accept: */*
>
* Empty reply from server
* Connection #0 to host localhost left intact
curl: (52) Empty reply from server
Unfortunately, no errors are written to the thin's output or log/production.log . 不幸的是，没有任何错误写入瘦目录的输出或log/production.log 。
2 个解决方案
解决方案1
0 2015-12-07 14:42:20
Completely wild speculative guess... but do you have partial caching enabled in production, and not able to reach the cache server (eg, memcache or redis) from your local environment? 完全是推测性的猜测...但是您是否在生产中启用了部分缓存，并且无法从本地环境访问缓存服务器（例如，memcache或redis）？ It might (???) explain why the HTML only partly renders. 它可能（???）解释了为什么HTML仅部分呈现。
解决方案2
0 2015-12-08 06:52:26
Did you update your config so that they point to all your local resources instead of trying to reach the production resources? 您是否更新了配置，以便它们指向您的所有本地资源，而不是尝试访问生产资源？
What I can think of happening here is that, one of your resource is probably un-reachable. 我可以想到的是，您的资源之一可能无法访问。 Also try to reduce the log level to debug in config/environments/production.rb 也尝试减少日志级别以在config / environments / production.rb中进行调试
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