Repository: stable-diffusion-webui
Issue: [Bug]: OSError: Cannot find empty port in range: 7860-7860 with EC2 in Auto scaling group
Labels: asking-for-help-with-local-system-issues

### Checklist

- [ ] The issue exists after disabling all extensions
- [ ] The issue exists on a clean installation of webui
- [ ] The issue is caused by an extension, but I believe it is caused by a bug in the webui
- [ ] The issue exists in the current version of the webui
- [ ] The issue has not been reported before recently
- [ ] The issue has been reported before but has not been fixed yet

### What happened?

When I deploy source on a normal ec2, when starting ec2, it does not have this error. But when I deploy source on an ec2 in auto scaling group, it will have this error.
![Screenshot 2024-10-25 at 09 44 01](https://github.com/user-attachments/assets/57ab64b4-2d5e-456e-89b8-b9d1e36f828e)


### Steps to reproduce the problem

1. Auto scaling group scale out 1 new ec2
2. EC2 running
3. SD start => error
4. SD restart => success

### What should have happened?

SD should start successfully instead of port error and SD will restart

### What browsers do you use to access the UI ?

_No response_

### Sysinfo

I use ec2 with instance type g6e.xlarge

### Console logs

```Shell
ct 25 01:35:30 ip-20-0-2-59.ec2.internal sh[843]: Launching launch.py...
Oct 25 01:35:30 ip-20-0-2-59.ec2.internal sh[843]: ################################################################
Oct 25 01:35:30 ip-20-0-2-59.ec2.internal sh[843]: glibc version is 2.34
Oct 25 01:35:30 ip-20-0-2-59.ec2.internal sh[843]: Cannot locate TCMalloc. Do you have tcmalloc or google-perftool installed on your system? (improves CPU memory usage)
Oct 25 01:35:49 ip-20-0-1-115.ec2.internal sh[949]: Python 3.11.9 (main, Apr 19 2024, 16:48:06) [GCC 11.2.0]
Oct 25 01:35:49 ip-20-0-1-115.ec2.internal sh[949]: Version: v1.6.0-1704-gc24ff95d
Oct 25 01:35:49 ip-20-0-1-115.ec2.internal sh[949]: Commit hash: c24ff95d305bf56e4afe5fdf76a5350481661c17
Oct 25 01:37:36 ip-20-0-1-115.ec2.internal sh[949]: CUDA 12.1
Oct 25 01:37:36 ip-20-0-1-115.ec2.internal sh[949]: Launching Web UI with arguments: --api --listen --cors-allow-origins '*' --port=7860
Oct 25 01:39:44 ip-20-0-1-115.ec2.internal sh[949]: no module 'xformers'. Processing without...
Oct 25 01:39:44 ip-20-0-1-115.ec2.internal sh[949]: no module 'xformers'. Processing without...
Oct 25 01:39:46 ip-20-0-1-115.ec2.internal sh[949]: No module 'xformers'. Proceeding without it.
Oct 25 01:40:08 ip-20-0-1-115.ec2.internal sh[949]: ControlNet preprocessor location: /home/ec2-user/stable-diffusion-webui/extensions/sd-webui-controlnet/annotator/downloads
Oct 25 01:40:24 ip-20-0-1-115.ec2.internal sh[949]: 2024-10-25 01:40:24,757 - ControlNet - INFO - ControlNet v1.1.455
Oct 25 01:40:38 ip-20-0-1-115.ec2.internal sh[949]: 01:40:38 - ReActor - STATUS - Running v0.7.1-b1 on Device: CUDA
Oct 25 01:40:38 ip-20-0-1-115.ec2.internal sh[949]: Loading weights [bc2f30f4ad] from /home/ec2-user/stable-diffusion-webui/models/Stable-diffusion/beautifulRealistic_v60.safetensors
Oct 25 01:40:41 ip-20-0-1-115.ec2.internal sh[949]: 2024-10-25 01:40:41,227 - ControlNet - INFO - ControlNet UI callback registered.
Oct 25 01:40:48 ip-20-0-1-115.ec2.internal sh[949]: Traceback (most recent call last):
Oct 25 01:40:48 ip-20-0-1-115.ec2.internal sh[949]:   File "/home/ec2-user/stable-diffusion-webui/launch.py", line 48, in <module>
Oct 25 01:40:49 ip-20-0-1-115.ec2.internal sh[949]:     main()
Oct 25 01:40:49 ip-20-0-1-115.ec2.internal sh[949]:   File "/home/ec2-user/stable-diffusion-webui/launch.py", line 44, in main
Oct 25 01:40:49 ip-20-0-1-115.ec2.internal sh[949]:     start()
Oct 25 01:40:49 ip-20-0-1-115.ec2.internal sh[949]:   File "/home/ec2-user/stable-diffusion-webui/modules/launch_utils.py", line 469, in start
Oct 25 01:40:49 ip-20-0-1-115.ec2.internal sh[949]:     webui.webui()
Oct 25 01:40:49 ip-20-0-1-115.ec2.internal sh[949]:   File "/home/ec2-user/stable-diffusion-webui/webui.py", line 79, in webui
Oct 25 01:40:49 ip-20-0-1-115.ec2.internal sh[949]:     app, local_url, share_url = shared.demo.launch(
Oct 25 01:40:50 ip-20-0-1-115.ec2.internal sh[949]:                                 ^^^^^^^^^^^^^^^^^^^
Oct 25 01:40:50 ip-20-0-1-115.ec2.internal sh[949]:   File "/home/ec2-user/stable-diffusion-webui/venv/lib/python3.11/site-packages/gradio/blocks.py", line 1896, in launch
Oct 25 01:40:51 ip-20-0-1-115.ec2.internal sh[949]:     ) = networking.start_server(
Oct 25 01:40:52 ip-20-0-1-115.ec2.internal sh[949]:         ^^^^^^^^^^^^^^^^^^^^^^^^
Oct 25 01:40:52 ip-20-0-1-115.ec2.internal sh[949]:   File "/home/ec2-user/stable-diffusion-webui/venv/lib/python3.11/site-packages/gradio/networking.py", line 169, in start_server
Oct 25 01:40:52 ip-20-0-1-115.ec2.internal sh[949]:     raise OSError(
Oct 25 01:40:52 ip-20-0-1-115.ec2.internal sh[949]: OSError: Cannot find empty port in range: 7860-7860. You can specify a different port by setting the GRADIO_SERVER_PORT environment variable or passing the `server_port` parameter to `launch()`.
Oct 25 01:40:54 ip-20-0-1-115.ec2.internal sh[949]: Creating model from config: /home/ec2-user/stable-diffusion-webui/configs/v1-inference.yaml
Oct 25 01:41:43 ip-20-0-1-115.ec2.internal sh[949]: Applying attention optimization: Doggettx... done.
Oct 25 01:41:53 ip-20-0-1-115.ec2.internal sh[949]: Model loaded in 74.7s (load weights from disk: 15.3s, create model: 1.1s, apply weights to model: 48.5s, load textual inversion embeddings: 1.5s, calculate empty prompt: 8.1s).
Oct 25 01:42:07 ip-20-0-1-115.ec2.internal systemd[1]: start-sdw.service: Deactivated successfully.
Oct 25 01:42:07 ip-20-0-1-115.ec2.internal systemd[1]: start-sdw.service: Consumed 17.646s CPU time.
Oct 25 01:42:27 ip-20-0-1-115.ec2.internal systemd[1]: start-sdw.service: Scheduled restart job, restart counter is at 1.
Oct 25 01:43:56 ip-20-0-1-115.ec2.internal systemd[1]: Stopped Run stable diffusion webui.
Oct 25 01:43:56 ip-20-0-1-115.ec2.internal systemd[1]: start-sdw.service: Consumed 17.646s CPU time.
Oct 25 01:43:56 ip-20-0-1-115.ec2.internal systemd[1]: Started Run stable diffusion webui.
```


### Additional information

_No response_