java - Apache HTTPClient HEAD 请求的最高性能？

Question

我使用 apache commons 4.x HTTPClient 向 URI 发出 HEAD 请求，只是为了获取该链接的最终 post 302 URL 位置。例如:http://bit.ly/test1231确实指向 cnn.com 或其他东西。使用 HttpClient 在可以运行数月而不泄漏的服务器中实现此目的的最佳和最有效的方法是什么？现在我遇到这样的问题:每 x 分钟所有线程都会卡住，同时尝试将连接从池中拉出，并且它们都超时。

我计划让 100 个工作线程执行获取操作，因此我使用了线程连接管理器。

更新这是我用来获取 httpClient 对象的代码

HttpParams httpParams = new BasicHttpParams();

HttpConnectionParams.setConnectionTimeout(httpParams, 5000);

HttpConnectionParams.setSoTimeout(httpParams, 5000);

ConnManagerParams.setMaxTotalConnections(httpParams, 5000);

HttpProtocolParams.setVersion(httpParams, HttpVersion.HTTP_1_1);



ConnManagerParams.setMaxConnectionsPerRoute(httpParams, new ConnPerRoute() {

   @Override

   public int getMaxForRoute(HttpRoute route) {

     return 35;

   }

 });

emptyCookieStore = new CookieStore() {

    @Override

    public void addCookie(Cookie cookie) {



    }

    ArrayList<Cookie> emptyList = new ArrayList<Cookie>();



    @Override

    public List<Cookie> getCookies() {

      return emptyList;

    }

    @Override

    public boolean clearExpired(Date date) {

      return false;

    }



    @Override

    public void clear() {

    }

  };



  // set request params

  httpParams.setParameter("http.protocol.cookie-policy", CookiePolicy.BROWSER_COMPATIBILITY);

  httpParams.setParameter("http.useragent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");

  httpParams.setParameter("http.language.Accept-Language", "en-us");

  httpParams.setParameter("http.protocol.content-charset", "UTF-8");

  httpParams.setParameter("Accept", "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");

  httpParams.setParameter("Cache-Control", "max-age=0");

  SchemeRegistry schemeRegistry = new SchemeRegistry();

  schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));

  schemeRegistry.register(new Scheme("https", PlainSocketFactory.getSocketFactory(), 443));

  final ClientConnectionManager cm = new ThreadSafeClientConnManager(httpParams,schemeRegistry);



  DefaultHttpClient httpClient = new DefaultHttpClient(cm, httpParams);

  httpClient.getParams().setParameter("http.conn-manager.timeout", 120000L);

  httpClient.getParams().setParameter("http.protocol.wait-for-continue", 10000L);

  httpClient.getParams().setParameter("http.tcp.nodelay", true);

Answer 1

很可能您有太多工作线程争夺很少的连接。请确保每个路由的最大连接数限制设置为合理的值(默认情况下，根据 HTTP 规范的要求，限制设置为两个并发连接)