求大神帮忙！PHP+nginx网站出现大量错误日志，每时每刻都有，这到底是什么错误

2018/06/15 07:31:15 [error] 22061#0: *31578272 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 117.23.61.221, server: www.XXXXX.com, request: "GET /show-56112.html HTTP/1.1", upstream: "fastcgi://unix:/tmp/php-cgi-54.sock:", host: "www.XXXXX.com"

量非常大，每时每刻都有，找了很久原因，找不到。

参考：https://blog.csdn.net/redsen/article/details/51330660

咨询阿里云之后，怀疑是CDN节点IP被阿里云盾拦截