Connection Errored out when running llm-rag-langchain on Gradio

[winniechj]

Hi,

I encountered Connection Errored out when running llm-rag-langchain on Gradio.
This error occurs on the first run, but it does not appear on subsequent runs.
However, there is no output each time.

This is my env:

System information:
Python executable: /home/winnie/openvino_notebooks/openvino_env/bin/python
Pip version: 25.0.1
OpenVINO source: /home/winnie/openvino_notebooks/openvino_env/lib/python3.10/site-packages/openvino
OpenVINO IE version: 2025.0.0-17942-1f68be9f594-releases/2025/0
OpenVINO environment activated: OK
Jupyter kernel installed for openvino_env: OK
Jupyter kernel Python executable: /home/winnie/openvino_notebooks/openvino_env/bin/python
Jupyter kernel Python and OpenVINO environment Python match: OK
Python version: 3.10 OK
OpenVINO pip package installed: OK
OpenVINO import succeeds: OK
OpenVINO not installed globally: OK
No broken requirements: OK

Please help to solve this, thank you.

[eaidova]

@winniechj check that you have correct proxy settings, in some cases proxy may block requests for gradio demo. I recommend to add env variable
no_proxy=localhost,127.0.0.1

[winniechj]

@eaidova I set the proxy but it doesn't work.

import os
os.environ['no_proxy'] = "localhost,127.0.0.1" 

[openvino-dev-samples]

Is there any log on notebook side ?

[winniechj]

@openvino-dev-samples
Yes, it shows: 2025/04/16 10:27:11 [W] [service.go:132] login to server failed: dial tcp 44.237.78.176:7000: i/o timeout. Is it related to proxy issue or gradio server?

[openvino-dev-samples]

@openvino-dev-samples Yes, it shows: 2025/04/16 10:27:11 [W] [service.go:132] login to server failed: dial tcp 44.237.78.176:7000: i/o timeout. Is it related to proxy issue or gradio server?

i thinks so, its a connection issue

[winniechj]

@openvino-dev-samples How can I deal with this issue?

[brmarkus]

@eaidova I set the proxy but it doesn't work.

import os
os.environ['no_proxy'] = "localhost,127.0.0.1" 

Some tools check for ENV variables in capital letters... could you set NO_PROXY as well?

[winniechj]

@brmarkus yes, I set the no_proxy