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golang 中listener close之后，积压在内核的连接就没法accept了
source link: https://phpor.net/blog/post/17547
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golang 中listener close之后，积压在内核的连接就没法accept了 – PHPor 的Blog
测试实例：
package main
import (
"bufio"
"fmt"
"net"
"sync"
func main() {
addr := "127.0.0.1:8181"
ln, err := net.Listen("tcp", addr)
if err != nil {
panic(err)
return
conn1, err := net.Dial("tcp", addr)
if err != nil {
panic(err)
n, err := fmt.Fprintf(conn1, "client hello\n")
if err != nil {
panic(err)
if n == 0 {
panic("应该能发送成功的")
wg := &sync.WaitGroup{}
wg.Add(1)
go func(conn net.Conn) {
defer wg.Done()
r := bufio.NewReader(conn)
l, _ , _ := r.ReadLine()
println("s:", string(l))
conn.Close()
}(conn1)
//ln.Close() // 如果这里 Close的话，下面的Accept就会失败，尽管上面有一个已经创建成功的连接
conn, err := ln.Accept()
if err != nil {
panic(err)
clientHello, _, _ := bufio.NewReader(conn).ReadLine()
fmt.Println("c:", string(clientHello))
fmt.Fprintf(conn, "server hello\n")
conn.Close()
wg.Wait()
Posted by phpor at 下午 6:07
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