Udp output fails with big json msg

i am using the udp output plugin to send json messages recieved from http and rabbitmq input.

logstash version 5.5.1
everything works fine for small messages.
when i hit the 32k json size - logstash crashes (the logstash agent) with the following error:
SocketError: send: name or service not known

i have found some old posts like this:

but no solution found.

help will be appreciated.


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