Undertow Simple HelloWorld 不适用于 Cloud Foundry

Undertow Simple HelloWorld not working on Cloud Foundry

我正在按照文档创建一个简单的 undertow HTTP 服务器: http://undertow.io/undertow-docs/undertow-docs-1.3.0/index.html

   public static void main(final String[] args) {
      Undertow server = Undertow.builder()
         .addHttpListener(8080, "0.0.0.0")
         .setHandler(new HttpHandler() {
            @Override
            public void handleRequest(final HttpServerExchange exchange) throws Exception {
               exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain");
               exchange.getResponseSender().send("Hello World");
            }
         }).build();
      server.start();
   }

它在本地主机上正常工作。但是当我作为独立的 java 应用程序部署在 Cloud Foundry 上时:

cf push im-gateway -p target\gateway.jar

应用程序无法启动并在日志中显示此错误:

Instance (index 0) failed to start accepting connections

经过调查,我修改推送命令:

cf push im-gateway -p target\gateway.jar --no-route

这次部署成功,手动创建路由尝试访问,报错:

502 Bad Gateway: Registered endpoint failed to handle the request.

我应该监听哪个端口? Cloud Foundry 如何将请求重定向到我的应用程序?

感谢任何回复。

根据文档,Cloud Foundry 为每个应用程序实例动态分配一个端口。

https://docs.cloudfoundry.org/devguide/deploy-apps/environment-variable.html#PORT

尝试用 .addHttpListener(System.getenv("PORT"), "0.0.0.0")

替换 .addHttpListener(8080, "0.0.0.0")