Non-blocking UDP I/O vs blocking UDP I/O in Java?

It's been a while since I've used Java's DatagramSockets, Channels and the like, but I can still give you some help.

UDP doesn't block (It only blocks while it is transferring the data to the OS) This means if at any point the next hop/switch/machine cannot buffer the UDP packet it drops it. This can be desirable behaviour in some situations. But it is something you need to be aware of.

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