502错误的网关错误

Question

当我多次浏览Magento网站时，我通常会在Nginx上遇到502错误的网关错误 请帮我解决这个问题。

注意： - php5-fpm在某些时候没有运行。重新启动php5-fpm后，一切正常，但一段时间后我再次遇到(php5-fpm is not running)错误。

Ngnix错误日志： -

2014/06/30 12:24:17 [error] 13359#0: *297122 connect() failed (111: Connection refused) while connecting to upstream, client: xxxxxxxx, server: www.xxxxxxxx.com, request: "GET /ultimate-comics-x-men-1967641 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.xxxxxxxx.com"
2014/06/30 12:24:28 [error] 13359#0: *297124 connect() failed (111: Connection refused) while connecting to upstream, client: xxxxxxxx, server: www.xxxxxxxx.com, request: "GET /virtual-engineering-simulation-and-optimization HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.xxxxxxxx.com"