Hi, Thanks for that helpful post, changing proxy setting to proxy-sendchunks did actually the trick! However I wonder which timeout could have been hit, at least KeepAliveTimeout and ProxyTimeout were set to a higher value than these 40 secs. Maybe a timeout on backend site... Br, Elmar -----Original Message----- From: ext Nick Kew [mailto:nick@xxxxxxxxxxxx] Sent: Wednesday, December 01, 2010 1:46 PM To: users@xxxxxxxxxxxxxxxx Subject: Re: pass request body failed On 1 Dec 2010, at 12:11, Sternath, Elmar (NSN - DE/Munich) wrote: > Hi, > > We use Apache 2.2.16 as a reverse proxy on both UNIX and Windows environment (by use of mod_proxy). In both environments, we have trouble when uploading big files (size 10 MB, upload time from client to proxy approx. 40 sec.) to the proxied backend application in Internet. What proxy-sendcl/proxy-sendchunks setting are you using? If you use proxy-sendcl, apache has to buffer all the data and you could be hitting a timeout. If proxy-sendchunks, does your backend support chunked encoding? -- Nick Kew --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx