In Java, how do I deal with UDP messages that are greater than the maximum UDP data payload?

UDP packets have a 16 bit length field. It's nothing to do with Java. They cannot be bigger, period.

If the server you are talking to is immutable, you are stuck with what you can fit into a packet.

The requirement should also therefore dictate the packetization technique. You need more information about the external system and its protocol. Note that the maximum IPv4 UDP payload Is 65535-28 bytes, and the maximum practical payload is.

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