[pritambarhate]

With Netty and Java you can easily handle 100-200k active web socket connections on a single server.

It was being done 7-8 years ago. If you search you should find a few articles on this.

[winrid]

Considering someone had a 100k+ idle connections on a raspberry pi with Java/Netty, yeah, you could get to a million today with some mid tier hardware and Linux tuning, pretty easily.