too many open files, when using net/http - http

Question

I am writing REST service using go-json-rest, which inturn using net/http.
My server code is simply, get the request and pass it to a channel
Here is my server code
package main
import (
"github.com/ant0ine/go-json-rest/rest"
"log"
"net/http"
"strconv"
"time"
)
const workerCount = 4
var evChannel = make(chan Event)
var workers = make([]*LogWorker, workerCount)
const maxLogFileSize = 100 // In MB
const maxLogFileBackups = 30
const maxLogFileAge = 5
const logFileName = "/home/sam/tmp/go_logs/event_"
func main() {
// Initialize workers
// Four workers is being created
for i := 0; i < workerCount; i++ {
var fileName = logFileName + strconv.Itoa(i)
workers[i] = NewLogWorker(fileName, maxLogFileSize, maxLogFileBackups, maxLogFileAge)
go workers[i].Work(evChannel)
}
// Initialize REST API
api := rest.NewApi()
//api.Use(rest.DefaultDevStack...)
api.Use(rest.DefaultCommonStack...)
router, err := rest.MakeRouter(
rest.Post("/events", StoreEvents),
)
if err != nil {
log.Fatal(err)
}
api.SetApp(router)
log.Fatal(http.ListenAndServe(":4545", api.MakeHandler()))
}
func StoreEvents(w rest.ResponseWriter, r *rest.Request) {
event := Event{}
err := r.DecodeJsonPayload(&event)
if err != nil {
rest.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// TODO : Add validation if needed
// Add code to parse the request and add further information to event
// log.Println()
select {
case evChannel <- event:
case <- time.After(5 * time.Second):
// throw away the message, so sad
}
// evChannel <- event
//log.Println(Csv(event))
w.WriteHeader(http.StatusOK)
}
When I execute it continuously using jmeter I am occasionally getting the below error
http: Accept error: accept tcp [::]:4545: too many open files; retrying in 10ms
Does net/http open files for every request?

Answer 1

Posting elithrar comment as answer
Sockets, yes. You may need to increase your fd limit (via ulimit or sysctl).