寻求用java DatagramPacket发送类QQ消息弹窗出现严重掉包的解决办法?

[quanc_java]

用struts2+spring+jpa搭建的后台系统,前台类QQ似的弹窗,用以下for循环,刚开始还行,但客户端达到几万台时,总出现严重的掉包问题,怎么解决?(之前用过线程池队列来解决,但效果不理想)
for (int i = 0; i < alst.size(); i++) {
Accesslog al = (Accesslog) alst.get(i); //Accesslog为客户端信息的pojo类
InetAddress ntaddr = InetAddress.getByName(al.getIp());
buf = common.CommFileDefine.xorHandle(msgall);
Integer port = al.getPort();
try {
if (ntaddr != null && port != null) {
DatagramPacket packet = new DatagramPacket(buf, buf.length,
ntaddr, al.getPort());
socket.send(packet);
}
setTip("消息发送成功！");
} catch (Exception e) {
setTip("消息发送失败！");
}
}