Heroku上的Java Web應用程序運行但無法回答

Question

我在Heroku上部署了帶有Spark框架的應用程序。 它是在Heroku上成功構建的，並且服務器已啟動，但是當我嘗試從服務器獲取響應時，收到HTTP 503，並且在日志中出現以下H14錯誤：

2019-03-10T17:52:44.983359+00:00 heroku[servergossip.1]: Restarting
2019-03-10T17:52:45.299269+00:00 heroku[servergossip.1]: State changed from up to starting
2019-03-10T17:52:46.338372+00:00 heroku[servergossip.1]: Stopping all processes with SIGTERM
2019-03-10T17:52:46.000000+00:00 app[api]: Build succeeded
2019-03-10T17:52:46.769383+00:00 heroku[servergossip.1]: Process exited with status 143
2019-03-10T17:52:48.416183+00:00 heroku[servergossip.1]: Starting process with command `java $JAVA_OPTS -cp target/classes:target/dependency/* Main --port 37274`
2019-03-10T17:52:49.054556+00:00 heroku[servergossip.1]: State changed from starting to up
2019-03-10T17:52:51.513243+00:00 app[servergossip.1]: Picked up JAVA_TOOL_OPTIONS: -Xmx300m -Xss512k -XX:CICompilerCount=2 -Dfile.encoding=UTF-8
...
2019-03-10T17:52:52.672327+00:00 app[servergossip.1]: INFO: Started ServerConnector@3ee6bd4d{HTTP/1.1}{0.0.0.0:37274}
2019-03-10T17:53:09.078587+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=POST path="/bot" host=servergossip.herokuapp.com request_id=45e0301a-3c82-495e-830d-2db0b0d1f9ef fwd="87.240.189.18" dyno= connect= service= status=503 bytes= protocol=https

我的Procfile文件：

servergossip: java $JAVA_OPTS -cp target/classes:target/dependency/* Main --port $PORT

Spark示例中的代碼：

public class Main {
    private static final Logger LOG = LoggerFactory.getLogger(Main.class);
    public static void main(String[] args) {

        port(getHerokuAssignedPort());

        get("/bot", (req, res) -> {
            return "hi";
        });
    }

    static int getHerokuAssignedPort() {
        ProcessBuilder processBuilder = new ProcessBuilder();
        if (processBuilder.environment().get("PORT") != null) {
            return Integer.parseInt(processBuilder.environment().get("PORT"));
        }
        return 4567;
    }

}

我使用了諸如heroku:scale *someproject* = 1 ，但沒有任何反應。 所以有什么問題？

Answer 1

您的Procfile當前定義了一個名為servergossip的進程類型。 那沒有多大意義。 將其更改為web流程：

web: java $JAVA_OPTS -cp target/classes:target/dependency/* Main --port $PORT