HttpGet.abort（）/ HttpPost.abort（）并不总是立即中止

Question

我正在使用Apache HttpComponents 4.2.1，并且无法使HttpGet.abort（）和HttpPost.abort（）总是立即中止。它在大多数时间都有效，但是有时连接会阻塞直到超时。我注意到只有在我明确设置超时值时才会发生这种情况。

这是我的测试代码：

public static void main(String[] args) throws Exception {
    for (int i = 0; i < 10; i++) {
        testAbort();
    }
}

public static void testAbort() throws Exception {
    String urlString = "http://slow.website.com";

    final HttpGet httpGet = new HttpGet(urlString);

    Runnable runnable = new Runnable() {
        public void run() {
            try {
                HttpClient httpClient = new DefaultHttpClient();

                HttpParams httpParams = httpClient.getParams();

                HttpConnectionParams.setConnectionTimeout(httpParams, 10000); // issue doesn't occur if I comment this line

                httpClient.execute(httpGet);
            } 
            catch (Exception e) {
                System.out.println(e.getMessage());
            }
        }
    };

    Thread t = new Thread(runnable);

    t.start();

    Thread.sleep(100);

    httpGet.abort();
}

这是我得到的输出示例：

Request already aborted
Request already aborted
Request already aborted
Socket closed
Request already aborted
Connection has been shut down
Socket closed
Socket closed
Connect to slow.website.com:80 timed out
Connect to www.website.com:80 timed out

您可能需要增加迭代次数或使用Thread.sleep（）值来弄乱问题的发生。

根据HttpComponent的文档，“当HTTP请求中止时，可以通过抛出InterruptedIOException来保证其在I / O操作中被阻塞的执行线程解除阻塞”（链接）

我正在运行Mac OS X 10.8（Java版本1.6.0_29）。

任何想法可能是什么问题？