连接到上游时，connect（）失败（111：连接被拒绝）。Java（SparkJava）Amazon Elastic

Question

尝试部署我的第一个应用程序（后端）。但是我遇到了502 Bad Gateway类型的错误。

2016/05/03 14:46:14 [error] 2247#0: *19 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.43.183, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "myHost.eu-west-1.elasticbeanstalk.com"
2016/05/03 14:50:23 [error] 2566#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.8.36, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "myHost.eu-west-1.elasticbeanstalk.com"
2016/05/03 14:55:04 [error] 2566#0: *61 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.43.183, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "myHost.eu-west-1.elasticbeanstalk.com"

我使用在端口4567上启动的后端框架SparkJava。因此，我扩展了Nginx的配置（nginx / 1.8.1）。但是问题始终存在。

server {
    listen 4567 default_server;
    listen [::]:4567 default_server ipv6only=on;
}

有关信息：我的后端与数据库通信（RDS aws亚马逊）

Answer 1

从您的日志中：upstream: "http://127.0.0.1:5000/"我看到，nginx 正在尝试连接到同一台机器上的 5000 端口，但它拒绝连接。什么在 5000 端口上运行？您可能需要对此进行调查。