如何強制Apache HttpClient / HttpConnection絕對關閉tcp連接？

Question

我使用許多與Apache HttpClient（org.apache.httpcomponents 4.3.6）建立的http連接來測試服務器，即使將HttpConnectionManager調度到httpClient.getConnectionManager().shutdown();也無法強制關閉連接httpClient.getConnectionManager().shutdown(); 在另一個線程10秒后。

httpClient.close()也無濟於事。

連接可能持續數分鍾甚至數小時。

我嘗試了自定義SocketConfig ，這也SocketConfig ：

 SocketConfig socketConfig = SocketConfig.custom()
                .setSoKeepAlive(false)
                .setSoLinger(5)
                .setSoReuseAddress(true)
                .setSoTimeout(5000)
                .setTcpNoDelay(true).build();

我獲取內容的方式：

  HttpUriRequest request = new HttpGet(url);
  HttpResponse response = httpClient.execute(request);

  try (InputStream in = response.getEntity().getContent()) {
       String result = IOUtils.toString(in, StandardCharsets.UTF_8);
       httpClient.close();
       return result;
  }

我建立HTTP客戶端的方式：

    SocketConfig socketConfig = SocketConfig.custom()
            .setSoKeepAlive(false)
            .setSoLinger(configuration.getInt("proxy.list.socket.so.linger"))
            .setSoReuseAddress(true)
            .setSoTimeout(configuration.getInt("proxy.list.socket.so.timeout"))
            .setTcpNoDelay(true).build();

    HttpClientBuilder builder = HttpClientBuilder.create();
    builder.disableAutomaticRetries();
    builder.disableContentCompression();
    builder.disableCookieManagement();
    builder.disableRedirectHandling();
    builder.setConnectionReuseStrategy(new NoConnectionReuseStrategy());
    builder.setDefaultSocketConfig(socketConfig);

我做關機的原型之一：

      shutdownExecutor.schedule(() -> {
            httpClient.getConnectionManager().closeExpiredConnections();
            httpClient.getConnectionManager().closeIdleConnections(1, TimeUnit.SECONDS);
            httpClient.getConnectionManager().shutdown();

            httpClient.notifyAll();
            try {
                httpClient.close();
            } catch (IOException ex) {

            }

        }, configuration.getInt("proxy.test.forced.timeout.seconds"), TimeUnit.SECONDS);

        String content = HttpContentFetcher.getAndCloseClient(url, httpClient);

Answer 1

RequestConfig有所幫助。 現在看起來所有連接都在指定的限制內被丟棄。

       RequestConfig config= RequestConfig.custom()
                .setCircularRedirectsAllowed(false)
                .setConnectionRequestTimeout(4000)
                .setConnectTimeout(4000)
                .setMaxRedirects(0)
                .setRedirectsEnabled(false)
                .setSocketTimeout(4000)
                .setStaleConnectionCheckEnabled(true).build();
        request.setConfig(config);