Lavalink Node Not Connecting in Wavelink 3.5.0

[haakon-ivy]

Description:
I've been troubleshooting this issue for to long, and I still cannot get Wavelink to connect to my Lavalink server. My bot starts up fine, but Wavelink just does not connect at all. It doesn't show any explicit connection errors, but when I try to play music, it says no nodes are connected.

Lavalink is running and accessible from the browser, so the server itself is working. When I check with netstat -ano | findstr :25432, it confirms that Lavalink is listening on the expected port. Also, if I go to http://127.0.0.1:25432 in my browser, it shows that Lavalink is receiving GET requests.

However, Wavelink does not connect at all.

Error when trying to play music:
"An error occurred: Command raised an exception: InvalidNodeException: No nodes are currently assigned to the wavelink.Pool in a CONNECTED state."

What I’ve Tried:
I uninstalled and reinstalled Wavelink multiple times using the latest version.
I checked that my config.json has the correct Lavalink details (127.0.0.1:25432, correct password).
I verified that Lavalink is running on the correct port and is accessible from the browser.
I restarted the bot and my PC multiple times.
I made sure that my bot is not using outdated NodePool methods.
I confirmed that no firewall is blocking Lavalink.
I also tried installing Wavelink directly from GitHub to make sure I have the latest version.
Config Details:
Here’s how my Lavalink details are set up:

Bot Config (config.json)

Token: My bot token
Prefix: ?
Lavalink host: 127.0.0.1
Lavalink port: 25432
Lavalink password: The correct password
Lavalink Server Config (application.yml)

Port: 25432
Address: 127.0.0.1
Password: Same password as in the bot config
YouTube, SoundCloud, Twitch, etc., are all enabled
Spotify client ID and secret are set correctly
Logging is set to DEBUG
Bot Code (Connecting to Lavalink)

The bot calls wavelink.Pool.create_nodes to connect to Lavalink.
It uses http://127.0.0.1:25432 with the correct password.
The function runs when the bot starts (on_ready event).
Final Notes:
I have tried everything I could find online, but Lavalink still refuses to connect in Wavelink.

Is Wavelink 3.5.0 fully compatible with Lavalink v4?
Are there any breaking changes between Wavelink 3.5.0 and Lavalink v3/v4?
Should I downgrade to Wavelink 3.4.1 or Lavalink v3?
Would really appreciate any insights or fixes. Thanks in advance!

[chillymosh]

Wavelink 3.x was written entirely for Lavalink 4.
Wavelink 2.x only worked for Lavalink 3, and both of these are unmaintained.

Copy pasting the sample from the github repo should just work as long as the uri="http://...."

Are you sure you have the application.yaml in the correct working directory of the Lavalink.jar and you are running Lavalink from inside the directory it lives in? Have you tried setting Lavalink host to 0.0.0.0 and the uri? Are you running Lavalink inside a container?

I suggest you join the Discord for further help as we would need to see exactly what you are doing.

[Jaie55]

Try this

            node: wavelink.Node = wavelink.Node(
                uri=f"ws://{os.getenv('LAVALINK_HOST')}:{os.getenv('LAVALINK_PORT')}",
                password=os.getenv('LAVALINK_PASSWORD')
            )
            await wavelink.Pool.connect(nodes=[node], client=self)
            print(f"Connected success to Lavalink in{node.uri}")
        except Exception as e:
            print(f"Error: {e}")
            return