There is no bug in Rails neither in Webserver!
It's a bug on passenger module implementation.

Anatoly

> That was a bug in rails not the web server.
>
>
> On Wed, Feb 13, 2013 at 11:30 AM, Anatoly Mikhailov <anatoly@sonru.com> wrote:
>
>> I'm struggling to find the source of a timeout. I am running Nginx (1.2.6),
>> Passenger 3.0.18, and Rails 3.2.11. On serving one long running request, I
>> find the results (CSV file) truncated after being returned from the client.
>> The Rails application however continues to serve up the data until complete,
>> at which time it reports:
>>
>> Couldn't forward the HTTP response back to the HTTP client: It seems the
>> user clicked on the 'Stop' button in his browser.
>>
>> Nginx access.log however reports a 200 for the request.
>>
>> Some things I have tried:
>> 1) I modified the Nginx read/send timeouts in the Passenger gem
>> (ext/nginx/Configuration.c) and recompiled, with no impact.
>> 2) I ran a test of bypassing Nginx/Passenger by going direct to my app
>> running in Unicorn, and it serves up the result fine. I then took Passenger
>> out of the equation by configuring Nginx to pass the requests to Unicorn,
>> and the truncated result is back again.
>> 3) I've played with the Nginx keepalive_timeout, proxy_read_timeout,
>> proxy_send_timeout and send_timeout - all with no impact.
>>
>> Any thoughts/advice would be much appreciated.
>>
>> Joe
>>
>> Posted at Nginx Forum: http://forum.nginx.org/read.php?2,236201,236201#msg-236201
>>
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>
> It happened for us many times, there is only one option - upstream.
> It can be Unicorn/PassengerStandalone/whatever.
>
> We spent a lot of time debugging Nginx, so there is no real solution
> for passenger built-in module.
>
>
> Anatoly
>
>
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