连接（）失败（111：连接被拒绝），同时连接到上游

访问目录中的PHP文件时遇到502 Gateway错误（ http://example.com/dev/index.php ）。 日志只是说这个：

 2011/09/30 23:47:54 [error] 31160#0: *35 connect() failed (111: Connection refused) while connecting to upstream, client: xx.xx.xx.xx, server: domain.com, request: "GET /dev/ HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "domain.com" 

我从来没有经历过这个。 什么是这种types的502 Gateway错误的解决scheme？

这是nginx.conf ：

 user www-data; worker_processes 4; pid /var/run/nginx.pid; events { worker_connections 768; # multi_accept on; } http { ## # Basic Settings ## sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; # server_tokens off; # server_names_hash_bucket_size 64; # server_name_in_redirect off; include /etc/nginx/mime.types; default_type application/octet-stream; ## # Logging Settings ## access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; ## # Gzip Settings ## gzip on; gzip_disable "msie6"; # gzip_vary on; # gzip_proxied any; # gzip_comp_level 6; # gzip_buffers 16 8k; # gzip_http_version 1.1; # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript; ## # Virtual Host Configs ## include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; } #mail { # # See sample authentication script at: # # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript # # # auth_http localhost/auth.php; # # pop3_capabilities "TOP" "USER"; # # imap_capabilities "IMAP4rev1" "UIDPLUS"; # # server { # listen localhost:110; # protocol pop3; # proxy on; # } # # server { # listen localhost:143; # protocol imap; # proxy on; # } #} 

• 使nginx在反向模式下传递上游的主机名
• 如何重新启动nginx？
• 在没有提供文件的情况下从Nginxconfiguration回复200
• 如何在不重启nginx的情况下进行修改？
• Nginxconfiguration无需停机即可重新加载

 server { listen 127.0.0.1; server_name localhost; error_log /var/log/nginx/localhost.error_log info; root /var/www/localhost/htdocs; location ~ \.php$ { fastcgi_pass 127.0.0.1:9000; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; fastcgi_intercept_errors on; error_page 404 /error/404.php; } } 

 # Upstream to abstract backend connection(s) for php upstream php { server unix:/var/run/php5-fpm.sock; #server 127.0.0.1:9000; } server { [...] location ~ \.php$ { # NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini # With php5-fpm: fastcgi_pass php; fastcgi_index index.php; fastcgi_intercept_errors on; include fastcgi_params; } } 

 listen 127.0.0.1;