connect（）的未知来源失败（111:连接被拒绝）-AWS ALB+；NGINX+；PHP-FPM（Wordpress），

这基本上不是问题所在，只是找不到消息的根本原因。 堆栈：

• AWS应用负载平衡器
• EC2实例/Ubuntu 18.04
• nginx版本：nginx/1.14.0（Ubuntu）
• PHP 7.2.24-0ubuntu0.18.04.7

该网站基于Wordpress，运行良好。已配置ALB运行状况检查，且实例运行状况良好，但每隔60秒，Nginx error.log中就会有一个条目：

==> /var/log/nginx/error.log <==
2020/11/10 13:56:42 [error] 1634#1634: *334 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.76.236, server: *.org, request: "GET /health_check HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "*.*.*.*"

==>/var/log/nginx/error.log/var/log/nginx/access.log
==> /var/log/nginx/access.log <==
172.31.76.236 - - [10/Nov/2020:13:56:42 +0000] "GET /health_check HTTP/1.1" 200 386 "-" "ELB-HealthChecker/2.0"
172.31.55.162 - - [10/Nov/2020:13:56:42 +0000] "GET /health_check HTTP/1.1" 200 386 "-" "ELB-HealthChecker/2.0"
172.31.76.236 - - [10/Nov/2020:13:57:12 +0000] "GET /health_check HTTP/1.1" 200 386 "-" "ELB-HealthChecker/2.0"
172.31.55.162 - - [10/Nov/2020:13:57:12 +0000] "GET /health_check HTTP/1.1" 200 386 "-" "ELB-HealthChecker/2.0"