我们有一个负载均衡器设置，后面有几个运行 nginx/unicorn/rails 的 centos 盒子。
我注意到我们只在 centos6 机器上看到 408 错误，而 centos5 服务器很好。所有机器上的 nginx 和 /proc 配置都是相同的。
我知道这些连接是由现代浏览器创建的。我只是想找出为什么我们只在 centos6 上获得那些 408er。有任何想法吗？
23.135.172.241 - - [27/Aug/2012:13:45:21 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip11:443 60.000 -
23.135.172.241 - - [27/Aug/2012:13:45:21 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip12:443 60.000 -
15.144.213.171 - - [27/Aug/2012:13:45:21 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip11:443 60.000 -
19.195.246.143 - - [27/Aug/2012:13:45:21 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip12:443 60.000 -
19.195.246.143 - - [27/Aug/2012:13:45:21 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip11:443 60.002 -
3.228.140.241 - - [27/Aug/2012:13:45:21 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip39:443 60.000 -
15.60.229.52 - - [27/Aug/2012:13:45:21 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip39:443 60.000 -
7.48.175.3 - - [27/Aug/2012:13:45:22 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip37:443 60.000 -
2.160.154.89 - - [27/Aug/2012:13:45:22 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip12:443 60.000 -
4.104.120.184 - - [27/Aug/2012:13:45:22 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip12:443 60.000 -
11.1.52.25 - - [27/Aug/2012:13:45:22 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip39:443 60.000 -
16.81.34.95 - - [27/Aug/2012:13:45:22 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip12:443 60.000 -
19.200.6.58 - - [27/Aug/2012:13:45:22 +0000] "-" 408 0 "-" "-" foo.bar.com 50.me.ip37:443 60.000 -