# IIS + Apache + Mongrel: Problem with big data submit form **URL:** \ **Category:** Rails\ **Created:** [January 10, 2010, 8:11am UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343 "2010-01-10T08:11:05Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![viettrung\_do](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b19c9b/32.png) [@viettrung\_do](https://www.ruby-forum.com/u/viettrung_do)\ **Post date:** [January 10, 2010, 8:11am UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343/1 "2010-01-10T08:11:05Z")
Hi all, I deployed a Rails application on a Windows Server 2003 machine as follows: - I created two instances of Mongrel at ports 4001, 4002 to serve the application - I set up an Apache instance at port 8080 for balancing load for the two Mongrels =\> So I can access my website at URL [http://mywebsite:8080/](http://mywebsite:8080/) - I want to allow users access my website without typing port 8080 in the URL. However, the server already runs IIS for several other web-sites at default port 80. Therefore, I used ISAPI Rewrite to forward requests from IIS (at port 80) to the Apache (and therefore towards the Mongrels) =\> I can access the website at URL [http://mywebsite/](http://mywebsite/) (To do these steps, I followed the guide in book Deploying Rails Application - Pragmatic Bookshelf) Everything seems to work fine until I find out the following problem: In my application, the user register form page allows user to upload his/her avatar. But whenever the file size is bigger than ~30KB, the browser keeps waiting for response from the server until getting timeout error. This error also occurs in any submitting form with a little big posted data. - Looking at the Apache error log file, I got the following error: * * * ## [error] proxy: pass request body failed to 127.0.0.1:4001 =\> Apache seems to fail to forward request to Mongrel instance - Looking at the Mongrel log file, I got the following error: * * * ## Error reading HTTP body: #\ Mongrel seems not to receive fully the data whose length specified in Content-Length attribute in the request header. One special thing is that this error just happens when I access the web-site via IIS, i.e., [http://mywebsite](http://mywebsite). This does not happen when I try directly with Apache at [http://mywebsite:8080](http://mywebsite:8080) or Mongrel at [http://mywebsite:4001/(4002)](http://mywebsite:4001/(4002)) ## So I think there may be something wrong at the point of forwarding requests from IIS to Apache using ISAPI Rewrite. I found this error in httperror.log: ## Timer\_EntityBody DefaultAppPool But I totally get stuck at that point. Please help if you have any suggestion to solve this problem. Thank you! Best regards, .Viet Trung. ---
**Author:** ![viettrung\_do](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b19c9b/32.png) [@viettrung\_do](https://www.ruby-forum.com/u/viettrung_do)\ **Post date:** [January 13, 2010, 9:06am UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343/2 "2010-01-13T09:06:45Z")
Anybody has any idea, please? Best regards, .Viet Trung. ---
**Author:** ![viettrung\_do](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b19c9b/32.png) [@viettrung\_do](https://www.ruby-forum.com/u/viettrung_do)\ **Post date:** [January 13, 2010, 12:52pm UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343/3 "2010-01-13T12:52:05Z")
On Jan 13, 8:05Â am, viettrung do [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Anybody has any idea, please? This sounds like an IIS problem, and few people on this group will know about that sort of stuff. Have you tried asking on an IIS related group Fred ---
**Author:** ![viettrung\_do](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b19c9b/32.png) [@viettrung\_do](https://www.ruby-forum.com/u/viettrung_do)\ **Post date:** [January 14, 2010, 6:41am UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343/4 "2010-01-14T06:41:36Z")
OK, thank you, Fred. Best regards, .Viet Trung. On Wed, Jan 13, 2010 at 6:50 PM, Frederick C. \< ---
**Author:** ![viettrung\_do](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b19c9b/32.png) [@viettrung\_do](https://www.ruby-forum.com/u/viettrung_do)\ **Post date:** [January 14, 2010, 11:24am UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343/5 "2010-01-14T11:24:31Z")
I’m facing the same trouble. If you already got the clue please let me know (So would I) my email is makarov\_petr[at][mail.ru](http://mail.ru). Thanx. ---
**Author:** ![viettrung\_do](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b19c9b/32.png) [@viettrung\_do](https://www.ruby-forum.com/u/viettrung_do)\ **Post date:** [January 18, 2010, 7:03am UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343/6 "2010-01-18T07:03:51Z")
Hi Makarov, Thanks for sharing the problem. On Thu, Jan 14, 2010 at 5:24 PM, Petr M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I’m facing the same trouble. If you already got the clue please let me > know (So would I) my email is makarov\_petr[at][mail.ru](http://mail.ru). Thanx. Unfortunately, I have still not figured it out. If having any further clue, I will inform you. Best regards, .Viet Trung. ---
**Author:** ![viettrung\_do](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b19c9b/32.png) [@viettrung\_do](https://www.ruby-forum.com/u/viettrung_do)\ **Post date:** [January 18, 2010, 1:47pm UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343/7 "2010-01-18T13:47:37Z")
viettrung do wrote: > … > One special thing is that this error just happens when I access the > web-site via IIS, i.e., [http://mywebsite](http://mywebsite). This does not happen when I > try directly with Apache at [http://mywebsite:8080](http://mywebsite:8080) or Mongrel at > [http://mywebsite:4001/(4002)](http://mywebsite:4001/(4002)) What about posting the uploads to [http://mywebsite:8080](http://mywebsite:8080) (as a workaround)? Regards, T. ---
**Author:** ![viettrung\_do](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/b19c9b/32.png) [@viettrung\_do](https://www.ruby-forum.com/u/viettrung_do)\ **Post date:** [January 18, 2010, 1:50pm UTC](https://www.ruby-forum.com/t/iis-apache-mongrel-problem-with-big-data-submit-form/181343/8 "2010-01-18T13:50:40Z")
T. N. T. wrote: > What about posting the uploads to [http://mywebsite:8080](http://mywebsite:8080) (as a > workaround)? Forget it.