tcp reset connection by peer - go

Question

I have a problem launching multiple go routines over 90000 to do http requests via POST to the same server, both the server and the client are locally, some of the requests are executed successfully and some of them giving me this response read: connection reset by peer
Please notice I am posting a small amount of data in the provided example
but actually I am sending a huge amount of data using protobuf.
This is the server https://play.golang.org/p/r1-rYNuAos
package main
import (
"net/http"
"log"
"encoding/json"
)
var port string
type problem struct{
}
func main() {
p := &problem{}
p.server(":9090")
}
func (self *problem)server(port string) {
s := &http.Server{
Addr: port,
Handler: self,
}
log.Println("Server started")
// Should be last line as it is a blocking.
log.Fatal(s.ListenAndServe())
}
func (self *problem) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusCreated)
if err := json.NewEncoder(w).Encode(map[string]interface{}{"created": true}); err != nil {
log.Fatal(err.Error())
}
}
And this is the client https://play.golang.org/p/Xx5qQoqrYm
package main
import (
"net/http"
"bytes"
"io/ioutil"
"log"
"fmt"
)
type problem struct{
}
func main() {
p := &problem{}
p.client(":9090")
}
func (self *problem)client(port string) {
var k int
for k=0;k<90000;k++ {
go func(){
nativeRequest, err := http.NewRequest(
"POST",
"http://127.0.0.1" + port + "/",
bytes.NewBuffer([]byte(`testing`)),
)
nativeRequest.Close = true
if err != nil {
fmt.Println(err.Error())
}
client := &http.Transport{
}
nativeResponse, err := client.RoundTrip(nativeRequest)
if err != nil {
log.Println(err.Error())
}
if nativeResponse != nil {
defer nativeResponse.Body.Close()
if err != nil {
fmt.Println(err.Error())
}
body, err := ioutil.ReadAll(nativeResponse.Body)
if err != nil {
fmt.Println(err.Error())
}
fmt.Println(string(body))
}
}()
}
}