Can't open NewStream on 0.41.1

[master255]

The bug is stably reproduced!
Version 0.41.1.
I can do this:
m.host.Connect(m.ctx, peerServer)
No error is returned.
And then I immediately do:
stream, err = m.host.NewStream(network.WithAllowLimitedConn(m.ctx, protocol), id, protocol)
and I get the error: connection failed

This lasts indefinitely. Until I restart the application completely.

This is a connection between nodes with white ip addresses.

Upd: And I've even found what causes the error:
I have another app running on the same device, with a different host id, which is also already successfully connected to the same host (which I can't connect to). The same DHT prefix is used.

The error occurs in protocol identification here:

go-libp2p/p2p/protocol/identify/id.go

Line 490 in 853011a

if err := msmux.SelectProtoOrFail(proto, s); err != nil {

The error is returned by the library go-multistream 0.6.0

Error text:
Application error 0x1001 (remote)

If I shut down an application that is successfully connected, the error goes away.
What to do? How to fix the error?

[MarcoPolo]

There error code hints that the resource manager on the target peer has hit its limits.

https://github.com/libp2p/specs/pull/623/files#diff-8756a726758ad689bbb6214a750a74937cc7200a99d4848249447733ce71b0feR9

[master255]

@MarcoPolo But what's the limit?
There are only 5 computers in my DHT.
And the bug reproduces all the time and at once when running two applications on the same device.
Maybe there is a limit on one connection from one device somewhere?

[master255]

I just tested it. It's true. If I close an application on my local network, the connection in my device is established, even with two applications.
I'm closing the bug for now. I will increase the limits.
Standard problem with Libp2p.

[master255]

Looks like it's MaxReservationsPerIP: 8,
I have exactly 8 applications running and 9 I'm trying to launch.

[master255]

MaxReservationsPerIP: 16
didn't help.
The problem appeared again steadily.

[master255]

@MarcoPolo How to increase the limit on the number of connections between two white ip addresses?

[master255]

I have three apps: app market, player, and chat.
Dad, mom and their child have installed these apps (standard scenario). That makes 9 apps. They run them all at the same time and hit your limit.

That's why I think the minimum limit should be 16 connections, not 8.

[master255]

I increased that limit. And it worked.
var defaultMaxConcurrentConns = 8