# Large POSTs through Apache mod\_proxy to mongrel failing **URL:** \ **Category:** Rails\ **Created:** [August 31, 2007, 12:07am UTC](https://www.ruby-forum.com/t/large-posts-through-apache-mod-proxy-to-mongrel-failing/113428 "2007-08-31T00:07:00Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Clifford\_H](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/49beb7/32.png) [@Clifford\_H](https://www.ruby-forum.com/u/Clifford_H)\ **Post date:** [August 31, 2007, 12:07am UTC](https://www.ruby-forum.com/t/large-posts-through-apache-mod-proxy-to-mongrel-failing/113428/1 "2007-08-31T00:07:00Z")
I have an Apache2 server working nicely with mod\_proxy pointing at mongrel that’s started using --prefix. One of my forms allows file upload, with the expectation of large files. When I upload a file of 370KB (from Firefox on Mac OS/X), Apache is returning a connection reset error and dropping this in error.log: Connection reset by peer: proxy: prefetch request body failed to localhost from AAA.BBB.CCC.DDD I checked the Apache source code, and there seems to be a 16384 byte buffer which it uses to try to prefetch the POST body so it can send Content-Length. After googling a bit, I tried setting some Apache2 special environment variables that promised to modify the behaviors: SetEnv downgrade-1.0 SetEnv proxy-sendcl SetEnv proxy-sendchunked I tried these one at a time… still get the error. What am I doing wrong? Clifford H… ---
**Author:** ![Clifford\_H](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/49beb7/32.png) [@Clifford\_H](https://www.ruby-forum.com/u/Clifford_H)\ **Post date:** [September 1, 2007, 9:15am UTC](https://www.ruby-forum.com/t/large-posts-through-apache-mod-proxy-to-mongrel-failing/113428/2 "2007-09-01T09:15:19Z")
Does no-one have an answer for this? Surely other people are uploading large files through Apache mod\_proxy? Can you share anything that looks relevant about your Apache config please? I’m really stuck here…