Lost UDP packages

Question

Hello.
I am strugling with a client that reads UDP packages from a DatagramChannel. The server is sending 1000 packages every 2 seconds. One package is 1468 bytes. My problem is that I don't get all the packages. I am using Ethereal to count the number of packages sent from server to client. I have set the receiveBuffer on the Socket to 75MB, a lot more than I need right now, but the server will send more data in the future. I have seen that the garbage collector runs quite regularly, and it seems that the more gc, the more data I loose, although this might be accidental. I loose packages even when I only count the packages received, and I loose even more if I try to process the data.
Is there some process, gc for instance, that prevents the packets from beeing bufferd in the receiveBuffer? Am I simply doing something terrible wrong?
Thanks in advance,
Gro
public void run()
ByteBuffer bBuf = ByteBuffer.allocateDirect(1500);
bBuf.order(ByteOrder.LITTLE_ENDIAN);
Iterator iterator = null;
Set readyKeys = null;
long numPackagesReceived = 0;
try
while (!stopped)
int rc = selector.select(6000);
if (rc > 0)
readyKeys = selector.selectedKeys();
if (!readyKeys.isEmpty())
iterator = readyKeys.iterator();
while (iterator.hasNext())
SelectionKey key = (SelectionKey) iterator.next();
iterator.remove();
if (key.isReadable())
bBuf.clear();
if (!mChannel.isConnected())
SocketAddress sender = mChannel.receive(bBuf);
mChannel.connect(sender);
System.out.println("Connecting to: " + sender.toString());
else
mChannel.read(bBuf);
numPackagesReceived++;
catch (Throwable e)
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
finally
System.out.println("Total number of packages : " + numPackagesReceived);
}

Answer 1

It wasn't very clear in the last message, but I actually count packets both in my client and in Ethereal. Ethereal receives more packets than I do. I know UDP is not reliable, but as long as Ethereal catches them, why don't I? By the way, I didn't write the server program that uses UDP so I cannot do anything about that.
-grofon