dosubot[bot] commented on issue #29913:
URL: https://github.com/apache/superset/issues/29913#issuecomment-2282367333
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Hello, @mkRui! I'm here to help you with any bugs, questions, or
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The `ECONNREFUSED` error indicates that the connection attempt to
`localhost:9000` was actively refused, likely because there is no server
listening on that port or another service is already using it. Additionally,
the `ERR_SERVER_ALREADY_LISTEN` error suggests that the `server.listen()`
method was called while a server was already active on that port.
To resolve this issue, follow these steps:
1. **Check for Running Instances**: Ensure that no other instances of the
server are running on port 9000. Use the following command to check if the port
is in use:
```bash
lsof -i :9000
```
If a process is using the port, terminate it using the `kill` command
with the process ID (PID) obtained from the previous step:
```bash
kill -9 <PID>
```
2. **Change the Port**: If terminating the process is not an option, you can
change the port Superset uses. Modify the `docker-compose.yaml` file or the
relevant configuration to use a different port:
```yaml
superset:
ports:
- 9001:9000 # Change the host port to 9001
```
3. **Restart Superset**: Restart the Superset service to apply the changes:
```bash
docker compose up
```
4. **Verify Configuration Files**: Ensure that the configuration files
(`config.json`, `nginx.conf`, `docker-compose.yml`) are correctly set up to
match the port settings. Misconfigurations in these files can also lead to
connection issues
<sup>[[1]](https://github.com/apache/superset/blob/master/docker/superset-websocket/config.json)</sup><sup>[[2]](https://github.com/apache/superset/blob/master/docker/nginx/nginx.conf)</sup><sup>[[3]](https://github.com/apache/superset/blob/master/docker-compose.yml)</sup>.
By following these steps, you should be able to resolve the port conflict
and get the proxy functioning properly.
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