UA_Client_connect() is blocking

[spole340]

Description

I tried to run example client_connect_loop.c, but the function UA_Client_connect() is blocking when OPC server is unreachable.
The program stuck here and if server is reachable it is not reconnected. I want to use UA_Client_connectUsername() insteat of UA_Client_connect(), but behavior is same (blocking). I need non blocking function that returns me something if something wrong. Can someone help me, please?

Background Information / Reproduction Steps

Checklist

Please provide the following information:

• open62541 Version (release number or git tag):
• Operating system: Ubuntu 22.04

[jpfr]

Are you using the 1.4 version?

we have dedicated _async versions for the connect methods. Use those.

It can take some time for the connection to fail. That depends on the DNS timeout configured in your operating system.

[Schokoladenblau]

I got the same error. The log shows the folling:
[2024-06-20 12:48:11.789 (UTC+0000)] info/eventloop Starting the EventLoop
[2024-06-20 12:48:11.789 (UTC+0000)] warn/client skip verifying ApplicationURI for the SecurityPolicy http:https://opcfoundation.org/UA/SecurityPolicy#None
[2024-06-20 12:48:11.789 (UTC+0000)] info/network TCP 8 | Opening a connection to "192.168.0.1" on port 4840
[2024-06-20 12:48:13.848 (UTC+0000)] info/network TCP 8 | The connection closes with error 111
[2024-06-20 12:48:13.848 (UTC+0000)] info/channel TCP 8 | SC 0 | SecureChannel closed
[2024-06-20 12:48:13.848 (UTC+0000)] error/client Could not open a TCP connection to the Endpoint at opc.tcp:https://192.168.0.1:4840
[2024-06-20 12:48:13.848 (UTC+0000)] info/client Client Status: ChannelState: Fresh, SessionState: Closed, ConnectStatus: BadConnectionRejected
[2024-06-20 12:48:13.848 (UTC+0000)] info/network TCP 8 | Socket closed

But after that the function doas not return, it gets stuck.
Git commit hash is 3d0da9a
I am using it inside Docker with the base image mcr.microsoft.com/devcontainers/cpp:1-debian-11

Note: If the Server is reachable everything works fine.

I now switched to the async way but got surprised, that the async function leads to periodic retrys to connect without me specifing to do so. This also didn't stop after quitting the while loop or callin Client_disconnect. The only way I found to stop that was by calling Client_delete which feels wrong to me... But this might be a different issue.