nginx http error 502

回答: Nginx HTTP错误502 Bad Gateway是指Nginx无法将请求的PHP文件转交给PHP-FPM处理，导致PHP-CGI进程终止或没有找到可执行的PHP-CGI进程。\[1\]\[3\]造成这个错误的原因可能有多种，其中一种可能是FastCGI配置有问题。在这种情况下，Nginx无法将PHP文件转交给PHP-FPM处理，导致CPU降低、负载升高和网卡流量降低。\[2\]要解决这个问题，可以检查FastCGI配置是否正确，并确保PHP-CGI进程能够正常执行。
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