Netty UDP 服务端 运行一段时间后占用CPU使用率很高

Netty UDP 服务端 运行一段时间后占用CPU使用率很高，求解答，

public void start() throws Exception {
final NioEventLoopGroup group = new NioEventLoopGroup();
try {
//启动数据处理线程
new YjInfoHandleThread(yjUserLoginMongodbService);

        final Bootstrap b = new Bootstrap();
        b.group(group).channel(NioDatagramChannel.class)
                .option(ChannelOption.SO_BROADCAST, true)
                .handler(new ChannelInitializer<NioDatagramChannel>() {
                    @Override
                    public void initChannel(final NioDatagramChannel ch) throws Exception {

                        ChannelPipeline p = ch.pipeline();
                        p.addLast(new ServerHandler(yjUserLoginMongodbService));
                    }
                });
        LOGGER.warn("启动UDP 服务端........................."+port);
        // Bind and start to accept incoming connections.
        //InetAddress address  = InetAddress.getLocalHost();
       // Channel channel= b.bind(address,port).sync().channel();
        b.bind(port).sync().channel().closeFuture().await();

    } finally {
        group.shutdownGracefully();
        System.out.print("In Server Finally");
    }
}

p.addLast(new ServerHandler(yjUserLoginMongodbService));
每来一个连接就会创建一个ServerHandler，是不是这个影响的？
最近也在学习Netty，了解到@sharable注解，Handler共享，具体你可以自行谷歌