502错误. Nginx日志：upstream sent too big header while reading response header from upstream

今天调试phalcon时发现一直502，日志里面有如下报错：

2013/10/11 23:18:44 [error] 51982#0: *1 upstream sent too big header while reading response header from upstream, client: 127.0.0.1, server: work.cc, request: "POST /api/user/register HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "test.work.cc", referrer: "http://test.work.cc/api/doc/"

google一番，解决方法如下：

在 nginx.conf 的http段，加入下面的配置：

proxy_buffer_size  128k;proxy_buffers   32 32k;proxy_busy_buffers_size 128k;

重启后一般就可以解决， 如果还是报502，再在host配置的php段加入下面配置：

fastcgi_buffer_size 128k;fastcgi_buffers 4 256k;fastcgi_busy_buffers_size 256k;

重启nginx即可。