java-Springboot TomcatEmbeddedServletContainer KeepAliveTimeout无法正常工作

@Bean   
public EmbeddedServletContainerFactory getEmbeddedServletContainerFactory() {
    TomcatEmbeddedServletContainerFactory containerFactory = new TomcatEmbeddedServletContainerFactory();
    containerFactory
            .addConnectorCustomizers(new TomcatConnectorCustomizer() {
                @Override
                public void customize(Connector connector) {
                    ((AbstractProtocol) connector.getProtocolHandler())
                            .setKeepAliveTimeout(30000);
                }
            });

    return containerFactory;
}

然后我从我的休息控制器睡了一个请求线程40秒钟.但是,当我通过邮递员发出请求时,它成功返回HTTP状态代码200,而应返回网关超时错误.

我同时尝试了setConnectionTimeout和setKeepAliveTimeout,但它没有用.

我在这里想念什么？

编辑问题：我最初的问题

让我解释一下我的原始问题,这使我提出了上述问题.

好吧,我有一个漫长的投票过程,通常运行大约5 minits.

因此,发生什么事是当我为longpoll调用Rest API时,在经过2.2次微型操作后,我在浏览器中收到504 http错误.

我正在使用一个AWS环境,其中有一个ELB和一个安装在AWS EC2实例中的HAProxy.

根据AWS文档,ELB的默认空闲连接超时为60秒.因此,我将其最多增加了30分钟.

而且它说,

If you use HTTP and HTTPS listeners, we recommend that you enable the
keep-alive option for your EC2 instances. You can enable keep-alive in
your web server settings or in the kernel settings for your EC2
instances.

因此,将上述代码段之类的嵌入式tomcat保持活动超时时间增加到30.2分钟

因此,现在我希望我的长时间轮询请求能够完成,并且不会出现504错误.但是我在浏览器中仍然收到504错误吗？

参考：AWS dev guide

@RestController
@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    @Bean
    public EmbeddedServletContainerFactory getEmbeddedServletContainerFactory() {
        TomcatEmbeddedServletContainerFactory containerFactory = new TomcatEmbeddedServletContainerFactory();
        containerFactory
                .addConnectorCustomizers(new TomcatConnectorCustomizer() {
                    @Override
                    public void customize(Connector connector) {
                        ((AbstractProtocol) connector.getProtocolHandler()).setConnectionTimeout(100);
                    }
                });

        return containerFactory;
    }

    @RequestMapping
    public String echo(@RequestBody String body) {
        return body;
    }
}

连接超时已设置为100毫秒,以便快速运行测试.数据以chunks发送.在每个块之间,正在运行的线程被暂停x毫秒.

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = DemoApplication.class)
@WebIntegrationTest("server.port:19000")
public class DemoApplicationTests {

    private static final int CHUNK_SIZE = 1;
    private static final String HOST = "http://localhost:19000/echo";

    @Rule
    public ExpectedException expectedException = ExpectedException.none();

    @Test
    public void slowConnection() throws Exception {
        final HttpURLConnection connection = openChunkedConnection();
        OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());

        writeAndWait(500, out, "chunk1");
        writeAndWait(1, out, "chunk2");

        out.close();

        expectedException.expect(IOException.class);
        expectedException.expectMessage("Server returned HTTP response code: 400 for URL: " + HOST);

        assertResponse("chunk1chunk2=", connection);
    }

    @Test
    public void fastConnection() throws Exception {
        final HttpURLConnection connection = openChunkedConnection();
        OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());

        writeAndWait(1, out, "chunk1");
        writeAndWait(1, out, "chunk2");

        out.close();

        assertResponse("chunk1chunk2=", connection);
    }

    private void assertResponse(String expected, HttpURLConnection connection) throws IOException {
        Scanner scanner = new Scanner(connection.getInputStream()).useDelimiter("\\A");
        Assert.assertEquals(expected, scanner.next());
    }

    private void writeAndWait(int millis, OutputStreamWriter out, String body) throws IOException, InterruptedException {
        out.write(body);
        Thread.sleep(millis);
    }

    private HttpURLConnection openChunkedConnection() throws IOException {
        final URL url = new URL(HOST);
        final HttpURLConnection  connection = (HttpURLConnection) url.openConnection();
        connection.setDoOutput(true);
        connection.setChunkedStreamingMode(CHUNK_SIZE);
        return connection;
    }
}

将包org.apache.catalina.core的日志级别设置为DEBUG

logging.level.org.apache.catalina.core=DEBUG

并且您可以看到SocketTimeoutException进行slowConnection测试.

我不知道为什么要使用HTTP状态代码502作为错误响应状态. HTTP 502说：

The 502 (Bad Gateway) status code indicates that the server, while
acting as a gateway or proxy, received an invalid response from an
inbound server it accessed while attempting to fulfill the request.

客户端邮递员会调用您的服务器应用程序.我看不到两者之间的任何网关或代理.

如果您只是将问题压缩到最低限度,而实际上您想自己构建一个代理,则可以考虑使用Netflix Zuul.

2016年3月23日更新：

这是OP关于Stackoverflow的问题的根本原因：

What i did with longpolling was, from service api, i sleep the thread for some time and wake it and do it again and again untill some db status is completed.

该实现实际上阻止了Tomcat工作线程处理新的HTTP请求.因此,每增加一个长时间运行的操作,您的请求吞吐量就会降低.

我建议将长时间运行的操作卸载到单独的线程中.客户端(浏览器)启动一个新请求以获取结果.
根据处理状态,服务器将返回结果或通知/错误/警告/.

这是一个非常简单的示例：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import static org.springframework.http.HttpStatus.CREATED;
import static org.springframework.http.HttpStatus.NOT_FOUND;
import static org.springframework.http.HttpStatus.OK;

@RestController
@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    private ExecutorService executorService = Executors.newFixedThreadPool(10);
    private Map<String, String> results = new ConcurrentHashMap<>();

    @RequestMapping(path = "put/{key}", method = RequestMethod.POST)
    public ResponseEntity<Void> put(@PathVariable String key) {
        executorService.submit(() -> {
            try {
                //simulate a long running process
                Thread.sleep(10000);
                results.put(key, "success");
            } catch (InterruptedException e) {
                results.put(key, "error " + e.getMessage());
                Thread.currentThread().interrupt();
            }
        });
        return new ResponseEntity<>(CREATED);
    }

    @RequestMapping(path = "get/{key}", method = RequestMethod.GET)
    public ResponseEntity<String> get(@PathVariable String key) {
        final String result = results.get(key);
        return new ResponseEntity<>(result, result == null ? NOT_FOUND : OK);
    }
}