Please help to see a timer problem, thank you.
go version go1.15.2 linux/amd64
CentOS Linux release 7.3.1611 (Core)
Problem Description:
The test is normal under win10, normal under Linux subsystem of win10, and abnormal on centos7 server. The problem is that in addition to executing according to the specified time, it is executed once in the previous few seconds, and the time is not fixed.
code
package main
import (
"io/ioutil"
"log"
"net/http"
"os"
"runtime"
"strconv"
"time"
)
var fileloger *log.Logger
var logFile *os.File
func initLogger() {
file := "./logs/" + time.Now().Format("20060102") + ".log"
var err error
logFile, err = os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0766)
//defer logFile.Close()
if err != nil {
panic(err)
}
fileloger = log.New(logFile, "", log.LUTC) // 将文件设置为loger作为输出
return
}
func CreatLogger() {
initLogger()
for {
now := time.Now()
next := now.Add(time.Hour * 24)
next = time.Date(next.Year(), next.Month(), next.Day(), 0, 0, 0, 0, next.Location())
t := time.NewTimer(next.Sub(now))
<-t.C
log.Println(time.Now(), "create file")
logFile.Close()
t.Stop()
initLogger()
}
}
func searchHandler(w http.ResponseWriter, r *http.Request) {
fileloger.Println(string(body))
w.Write([]byte(strconv.Itoa(runtime.NumGoroutine())))
}
func main() {
runtime.GOMAXPROCS(runtime.NumCPU())
go CreatLogger()
http.HandleFunc("/search", searchHandler)
log.Println("Server start listen on port:", 18080)
err := http.ListenAndServe(":18080", nil)
if err != nil {
log.Fatal("ListenAndServe: ", err.Error())
}
}
logs ：
2020/10/09 14:48:52 Server start listen on port: 18080
2020/10/09 23:59:57 2020-10-09 23:59:57.197181062 +0800 CST m=+33067.952413287 create file
2020/10/10 00:00:00 2020-10-10 00:00:00.00015083 +0800 CST m=+33070.755383073 create file
2020/10/10 23:59:52 2020-10-10 23:59:52.519040092 +0800 CST m=+119470.755332920 create file
2020/10/11 00:00:00 2020-10-11 00:00:00.000123355 +0800 CST m=+119478.236416191 create file
2020/10/11 23:59:58 2020-10-11 23:59:58.635823011 +0800 CST m=+205878.236415904 create file
2020/10/12 00:00:00 2020-10-12 00:00:00.000176828 +0800 CST m=+205879.600769738 create file