I'm using ES and filebeat v8.8.0. I noticed that every few minutes, I would get the "Connection reset by peer" message in my filebeat logs, and then it would reconnect itself to ES.
The only thing that has changed in my setup was I upgraded the connection between my filebeat servers to the ES cluster from a 1G to 10G connection. I have not encountered this message when the connection was 1G (even now).
What could be the problem here? Is this a network issue, or a load issue (as more traffic would be sent to the ES over the 10G link)?