Huge ammount 400 at nginx access.log

Posted by KsI on August 24, 2012 Leave a comment (2) Go to comments

I observe alot of 400 at nginx access.log.
After investigation found, that modern browsers open 2+ simultanious connections, but some of them frequently not used for data transfer, so nginx close them by timeout with 400 code at access.log

hereis my session from chrome:

root@ads1-1:~# tail -f /var/log/nginx/access.log | grep 77.232.X.X
77.232.X.X – – [24/Aug/2012:22:40:36 +0400] “-” 400 0 “-” “-”
77.232.X.X – – [24/Aug/2012:22:40:37 +0400] “GET /adnet/css/adpreview/20120621.css HTTP/1.1” 200 7644 “http://smi2.ru/data/pop/gen.inner.php?bl=32380” “Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.79 Safari/537.1”

So, don`t panic if your found a huge ammount of 400 at access.log