sockets - Java multiple connection to server in dynamic ports -

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i need have udp server allow me receive/send informations from/to clients dynamically open socket free port (so it differente device , device). client send , receive in same port, server must able communicate it.

how set server stay open in every port? if had 250 thousand users how handle them without tails problem , preventing port occupied client?

i thought open every port different sockets in different thread, don't know if correct way.

a udp server can listen , open on 1 port. clients can send data port. server have handle each data , respond if needed peer sent data. should happen if more 1 client wish send data server. in udp context 1 client not hog server port.(unless application badly written).


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