Listening multiple ports on golang http servers, closing only one port

main.go

package main

import (
	"context"
	"fmt"
	"net/http"
	"time"
)

func main() {
	finish := make(chan bool)

	server8001 := http.NewServeMux()
	server8001.HandleFunc("/foo", foo8001)
	server8001.HandleFunc("/bar", bar8001)

	server8002 := http.NewServeMux()
	server8002.HandleFunc("/foo", foo8002)
	server8002.HandleFunc("/bar", bar8002)

	httpServer8001 := http.Server{
		Addr:    ":8001",
		Handler: server8001,
	}
	httpServer8002 := http.Server{
		Addr:    ":8002",
		Handler: server8002,
	}
	go func() {
		fmt.Println("Listening on port 8001")
		httpServer8001.ListenAndServe()
	}()

	go func() {
		fmt.Println("Listening on port 8002")
		httpServer8002.ListenAndServe()
	}()

	go func() {
		time.Sleep(10 * time.Second)
		fmt.Println("shutdown server on port 8002")
		httpServer8002.Shutdown(context.TODO())
	}()

	<-finish
}

func foo8001(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("Listening on 8001: foo "))
}

func bar8001(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("Listening on 8001: bar "))
}

func foo8002(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("Listening on 8002: foo "))
}

func bar8002(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("Listening on 8002: bar "))
}