Question

尝试部署我的第一个应用（后端）。但我遇到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"

我用于我的后端框架SparkJava，它在端口4567上启动。因此，我扩展了Nginx（nginx / 1.8.1）的配置。但问题总是存在。

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

有关信息：我的后端与数据库（RDS aws amazon）进行通信

Answer 1

从您的日志：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，它拒绝连接。什么在5000端口上运行？你可能需要研究一下。

连接到上游时connect（）失败（111：连接被拒绝）。 Java（SparkJava）亚马逊弹性

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