> ## Documentation Index
> Fetch the complete documentation index at: https://ngrok.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Error 334

## ERR\_NGROK\_334

The endpoint `URL` is already online. Either

1. stop your existing endpoint first, or
2. start both endpoints with `--pooling-enabled` to load balance between them.

### Additional Information

You can only use a tunnel URL for one tunnel session at a time. This error occurs when an ngrok tunnel with the requested URL is already online.

This error also appears if you attempt to create multiple tunnels using the same hostname.

* You can [view tunnel status from your dashboard](https://dashboard.ngrok.com/endpoints).
* You can also [view actively connected agents from your dashboard](https://dashboard.ngrok.com/agents). Select one from the list to view any tunnels that agent is handling.

### Possible Solutions

* Stop the tunnel that is currently running in order to make your desired URL available.
* Choose a different unique URL or hostname to start your tunnel.

## Further help

If you're having trouble resolving this error, please reach out to [support@ngrok.com](mailto:support@ngrok.com?subject=Help%20with%20ERR_NGROK_334)