带有HttpServletResponse的Java断管

我正在编写一个音乐web应用程序，一个servlet处理mp3请求，首先我播放mp3，正确播放，暂停它，然后继续，我得到一个ClientBortException，我的容器是tomcat7。我不知道我做错了什么，请给我一些帮助。谢谢

@WebServlet("/mp3")
public class Mp3Servlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        Path path = Paths.get("/Users/jiangxingshang/Documents/workspace/eclipse/MyMusic/my-music/src/main/webapp/assets/sound/1.mp3");
        try (
                SeekableByteChannel input = Files.newByteChannel(path, StandardOpenOption.READ);
                WritableByteChannel output = Channels.newChannel(resp.getOutputStream())) {
            String range = req.getHeader("range");
            int pos = 0;
            if(StringUtils.isNotEmpty(range)) {
                String[] tmp = StringUtils.removeStart(range, "bytes=").split("-");
                try {
                    pos = Integer.valueOf(tmp[0]);
                    input.position(pos);
                } catch(NumberFormatException ignore) {
                    pos = 0;
                }
            }
            System.out.println("start position: " + pos);
            int len = (int)Files.size(path);
            resp.addHeader("Accept-Ranges", "bytes");
            resp.addHeader("Connection", "Keep-Alive");
            resp.addHeader("Content-Range", String.format("bytes %d-%d/%d", pos, len - 1, len));
            resp.addHeader("Keep-Alive", "timeout=2, max=100");
            resp.addDateHeader("Last-Modified", Files.getLastModifiedTime(path, LinkOption.NOFOLLOW_LINKS).toMillis());
            resp.setContentType("audio/mpeg");
            resp.setContentLength(len);
            ByteBuffer bb = ByteBuffer.allocate(2048);

            while(input.read(bb) != -1) {
                bb.flip();
                output.write(bb);
                bb.clear();
            }
        } catch(IOException e) {
            e.printStackTrace();
        }
    }
}

两次请求头，我已删除Cookie和用户代理头信息

首演

host: localhost:8080
connection: keep-alive
pragma: no-cache
cache-control: no-cache
accept-encoding: identity;q=1, *;q=0
accept: */*
accept-language: ja,en-US;q=0.8,en;q=0.6,zh;q=0.4
range: bytes=0-
----------------------------------------------------------------------
start position: 0

什么时候恢复

host: localhost:8080
connection: keep-alive
pragma: no-cache
cache-control: no-cache
accept-encoding: identity;q=1, *;q=0
accept: */*
accept-language: ja,en-US;q=0.8,en;q=0.6,zh;q=0.4
range: bytes=229376-
----------------------------------------------------------------------
start position: 229376