Hi, I have this configuration haproxy -> nginx (static) -> apache (php) . It is working fine for large traffic sites. These days I'm adding a new site and I starting to see 502 errors when saving a form with POST method. The errors were from nginx so I change the header size limit to a higher value. The problem was solved for nginx but now I have 502 errors from haproxy. I think I need to increase the BUFSIZE value in the source files of haproxy. But I have some doubts. To test I put apache directly behind of haproxy and decrease the apache limits for size headers to 4k and apache started to throw 502 errors. When I increase the value to the default again haproxy is getting 502 errors.
So, the solution seems obvious (increase the BUFSIZE value) but I wonder why apache accept the headers with 8k and haproxy doesn't. Also, how can I know which is the size of the headers? Maybe I can avoid compile haproxy and try to decrease the headers size from the application. This is the log from haproxy when the post is sent: Jan 7 15:13:11 127.0.0.1 haproxy[4372]: X.X.X.X:29320 [07/Jan/2010:15:13:11.105] main bproxy/proxy1 110/0/1/-1/188 502 8396 - - PHVN 615/615/0/0/0 0/0 "POST /user/config HTTP/1.1" It is similar to this case: http://www.mail-archive.com/[email protected]/msg01602.html Thanks! Héctor Paz
