socket_high_cpu.rb

require 'socket'

HOST = 'localhost'
PORT = 5555

def connect_and_close
  socket = TCPSocket.new(HOST, PORT)
  linger = [1,0].pack('ii')
  socket.setsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER, linger)
  socket.close
end

def tcp_receiver(socket)
  socket.each { |line| puts line }
rescue Errno::ECONNRESET
  puts "connection reset"
end

server_thread = Thread.new do
  server_socket = TCPServer.new(HOST, PORT)
  loop do
    socket = server_socket.accept

    Thread.new(socket) do |socket|
      tcp_receiver(socket)
    end
  end
end

sleep 1
10.times { connect_and_close }

server_thread.join