Hi,

I'm using Nginx+PHP+MySQL on CentOS since two weeks and it works great (with 20 000 visitors/day).

But every minutes, I received several errors like this one :

2008/09/16 12:39:30 [error] 25031#0: *5786740 upstream prematurely closed connection while reading response header from upstream, client: 99.99.9.199, server: localhost, request: "GET /search?query=test&pag e_number=8 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.****.com", referrer: "http://www.****.com/search?query=test&page_number=7"

My only clues are:

1- "fastcgi_read_timeout 180;" doesn't solve my problem.

2- The error occured before executing the first line of my php script. So, it's not a MySQL problem, nor a php script problem.

3- There was a lot of "TIME_WAIT" connections on the fast_cgi program (1000 time_wait for 1500 connections). I activated the tcp_time_wait_recycler, the time_wait connections decreased but the problem is still there.

4- I tested 5 php-cgi and 20 php-cgi : the error rating is the same.

5- More traffic increase the number of errors.

Do you have an advice? A way to debug this problem? Any help?

Thanks a lot!

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I use: . Nginx 0.6.32 . PHP 5.1.6 . MySQL 5.0.45 . spawn-fcgi 1.4.19

My nginx.conf

---------------------------------------------------------- user apache apache; worker_processes 2;

events { worker_connections 1024; }

http { include mime.types; default_type application/octet-stream;

log_format main '$remote_addr [$time_local] "$request" $status $body_bytes_sent "$http_referer"'; access_log logs/access.log main;

sendfile on; keepalive_timeout 65;

gzip on; gzip_types text/plain text/html text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript;

server { listen 80; server_name localhost;

root /home/webmaster/www;

location / { index index.php; rewrite ^/?$ /index.php last; rewrite ^/?index\.php$ /index.php last; rewrite ^/?page_number=([0-9]*)$ /index.php?page_number=$1 last; rewrite ^/?(.*)$ /search.php?query=$1 last; }

# PHP configuration location ~ .*\.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /home/webmaster/www$fastcgi_script_name; fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; fastcgi_param REDIRECT_STATUS 200; }

# Static files configuration location ~* ^.+.(jpg|jpeg|gif|css|png|js|ico)$ { access_log off; expires 30d; } } }