[Bug]: bind: address already in use when using without reuseAddr parameter

[gohryt]

Actions I've taken before I'm here

• I've thoroughly read the documentations on this issue but still have no clue.
• I've searched the Github Issues but didn't find any duplicate issues that have been resolved.
• I've searched the internet for this issue but didn't find anything helpful.

What happened?

I've made a simple server

Server struct {
	Engine gnet.Engine
}
server := &server.Server{}

which implements gnet.EventHandler interface and run it with gnet

err := gnet.Run(server, "tcp://0.0.0.0:3000",
	gnet.WithMulticore(true), gnet.WithTCPKeepAlive(alive), gnet.WithTCPNoDelay(gnet.TCPNoDelay))

on the ctrl+c i'm stopping this server with

err := server.Engine.Stop(background)

All this scheme works ok, but only if not send requests to server.
When i open the 0.0.0.0:3000 page in browser it works correctly and closes gnet server correctly, but it gives "bind: address already in use" on the every next start of program

Major version of gnet

v2

Specific version of gnet

v2.3.2

Operating system

Linux

OS version

Linux 6.5.3-arch1-1 x86_64

Go version

go version go1.21.0 linux/amd64

Relevant log output

[gohryt@gohrytpc Go]$ go build && ./go
{"trace_id":"00000000000000000000000000000000","timestamp":"14-09-2023 17:46:25","level":"DEBUG","message":"boot"}
{"trace_id":"5a975d1e75b7498aa52f305845e21a78","timestamp":"14-09-2023 17:46:36","level":"DEBUG","message":"open"}
{"trace_id":"18ee031ccbae4f0290807bf83bc87a0d","timestamp":"14-09-2023 17:46:36","level":"DEBUG","message":"open"}
{"trace_id":"5a975d1e75b7498aa52f305845e21a78","timestamp":"14-09-2023 17:46:36","level":"DEBUG","message":"traffic"}
{"trace_id":"5a975d1e75b7498aa52f305845e21a78","timestamp":"14-09-2023 17:46:36","level":"DEBUG","URI":"/"}
{"trace_id":"5a975d1e75b7498aa52f305845e21a78","timestamp":"14-09-2023 17:46:36","level":"DEBUG","message":"traffic"}
{"trace_id":"5a975d1e75b7498aa52f305845e21a78","timestamp":"14-09-2023 17:46:36","level":"DEBUG","URI":"/favicon.ico"}
^C{"trace_id":"00000000000000000000000000000000","timestamp":"14-09-2023 17:46:38","level":"DEBUG","message":"shutdown"}
{"trace_id":"18ee031ccbae4f0290807bf83bc87a0d","timestamp":"14-09-2023 17:46:38","level":"DEBUG","message":"close"}
{"trace_id":"5a975d1e75b7498aa52f305845e21a78","timestamp":"14-09-2023 17:46:38","level":"DEBUG","message":"close"}
[gohryt@gohrytpc Go]$ go build && ./go
{"trace_id":"00000000000000000000000000000000","timestamp":"14-09-2023 17:46:50","level":"ERROR","error":"bind: address already in use"}
{"trace_id":"00000000000000000000000000000000","timestamp":"14-09-2023 17:46:50","level":"ERROR","error":"the internal engine is empty"}

Code snippets (optional)

No response

How to Reproduce

Steps to reproduce the behavior:

1. start http example from https://github.com/gnet-io/gnet-examples
2. open it's main page in browser
3. stop http example
4. start it again

Does this issue reproduce with the latest release?

It can reproduce with the latest release

[panjf2000]

This is not a bug, it's intended for TCP, see #485 (comment).

[gohryt]

Maybe describe this behavior in Engine.Stop comment?