tengine2.2.3報錯502的The proxy server received an invalid response from an upstream server問題處理
現象：
訪問訂單的時候報錯：
502 Bad Gateway
The proxy server received an invalid response from an upstream server. Sorry for the inconvenience.
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nginx的錯誤日志：
2019/01/23 21:56:23 [error] 3473#0: *118756 upstream prematurely closed FastCGI stdout while reading response header from upstream, client: 150.242.228.234, server: store.wondershare.net, request: "GET /checkout/repurchase/?code_id=9e6a16&from=cart&machine_no=eus HTTP/1.1", upstream:
"fastcgi://unix:/tmp/php-cgi.sock:", host: "store.chinasoft.net", referrer: "https://store.chinasoft.net/checkout/myCart/?code_id=9e6ab74ae2f&machine_no=eus"
4台服務器都是這樣的配置綁定hosts的時候只有其中一台報這種錯誤
nginx.conf主配置：
fastcgi_buffer_size 128k;
fastcgi_buffers 4 129k;
改為下面的參數后問題解決：
fastcgi_buffer_size 128k;
fastcgi_buffers 32 32k;