@SuppressWarnings("resource")
	public static void main(String[] args)  {
		ServerSocket server = null;
		try {
			server = new ServerSocket(12346);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		while (true) {
			// transfer location change Single User or Multi User
			DataNodeServer1 ser = null;
			try {
				ser = new DataNodeServer1(server.accept());
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			ser.start();
		}
	}