简单的开放式插座很少悬挂

我有一段相当简单的代码挂在java中。这种情况很少发生。也许每1000次处决就有一次。在设备的循环中运行它似乎不会重现问题。

long timeout = 10000;
long endTime = System.currentTimeMillis() + timeout + 5000;
Socket pingSocket = null;
String host = "host";
String port = "22";

do {

    try {
        pingSocket = new Socket();
        pingSocket.bind(null);
        pingSocket.connect(new InetSocketAddress(host, port), 5000);
        if (pingSocket.isConnected()) {
            pingSocket.close();
            return true;
        }
        pingSocket.close();
    }
    catch (UnknownHostException e) {
        throw e;
    }
    catch (IOException e) {
        // All other errors are subclassed from IOException, and i want
        // to ignore till after my spin period.
    }

    try {
        Thread.sleep(SPIN_SLEEP_DELAY);
    }
    catch (InterruptedException e) {
        return false;
    }

} while (System.currentTimeMillis() <= endTime);

由于这种情况在生产中很少发生,所以很难缩小问题的范围。我目前正在检测代码,以便在发生这种情况时,我们产品的下一个版本将获得更多信息,但我想我会问,是否有人以前只见过简单的绑定/连接/断开连接/关闭挂起?

谢谢