JxtaMulticastSocket接收数据不要循环使用buffer

注意第一行和第二行，每次for循环，都使用同一个buffer,这样当接收数据时，会抛出异常。可以将buffer的声明放在for循环的里面。另外注意在开发的时候，最好将所有异常的堆栈打出，这样便于及早发现问题。
java 代码

public void run() {
    byte[] buffer = new byte[16384];
    DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
    try {
        for (;;) {

            // pool正在关闭(shutdown)时不在接收数据
            if(!pool.isShutdown() && !pool.isTerminated()) {
                mcastSocket.receive(packet);
                pool.execute(new Handler(packet));
            } else {
                LOG.info("JxtaMulticastSocketService is now shutdown.");
            }

        }
    } catch (IOException ex) {
        ex.printStackTrace();
        pool.shutdown();
    }
}

java 代码

java.io.IOException: Datagram can not accomodate message of size :247
    at net.jxta.socket.JxtaMulticastSocket.receive(JxtaMulticastSocket.java:432)
    at jxtamessenger.background.JxtaMulticastSocketService.run(JxtaMulticastSocketService.java:85)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)