Question 98363 in Nginx Question posted in
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The Streamlit app stops with "Please wait… " and then stops – Nginx

Problem

The app started by running streamlit run main.py will display http://IP_ADDRESS:8501 is displayed correctly, but http://DOMAIN_NAME stops with "Please wait… " and stops.

enter image description here

Environment

  • Domain name already resolved with Route53
  • Deploy Streamlit App on EC2 (Amazon Linux) and run Streamlit run main.py on Tmux
  • Use Nginx to convert access to port80 to port8501

Changed Nginx settings

/etc/nginx/nginx.conf

server {
        listen       80; #default
        listen       [::]:80; #default
        server_name MY_DOMAIN_NAME;
        location / {
          proxy_pass http://MY_IP_ADDRESS:8501;
        }
        root         /usr/share/nginx/html; #default

What I tried

I tried the following, but it did not solve the problem.

https://docs.streamlit.io/knowledge-base/deploy/remote-start#symptom-2-the-app-says-please-wait-forever

  • streamlit run my_app.py --server.enableCORS=false

  • streamlit run my_app.py --server.enableWebsocketCompression=false

Tags:

5

Answers


  1. 0

    Try the following conf:

    server {
    listen 80 default_server;
    server_name MY_DOMAIN_NAME;

    location / {
        proxy_pass http://127.0.0.1:8501/;
            proxy_http_version 1.1;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_read_timeout 86400;
    }

    and then, use this command line:

    streamlit run my_app.py --server.port 8501 --server.baseUrlPath / --server.enableCORS false --server.enableXsrfProtection false
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  2. 0

    If anyone is using Ambassador as their ingress to kubernetes you’ll need to allow websockets. This is explained at https://www.getambassador.io/docs/edge-stack/latest/howtos/websockets/

    But, you essentially need to add the following to your Mapping

    allow_upgrade:
- websocket
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  3. 0 
    --server.headless=true

    I think the only problem is Streamlit trying to open a browser, so simply add this parameter in your run command:

    • streamlit run my_app.py --server.headless=true

    or try to change this in the config file which is you need to create:

    Refer to this explanation.

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  4. 0

    Try to upgrade Streamlit code to version 1.11.1.

    Refer to this link: https://discuss.streamlit.io/t/security-notice-immediately-upgrade-your-streamlit-code-to-version-1-11-1/28399:

    On July 27th, 2022, we learned of a potential vulnerability in the
    Streamlit open source library that impacts apps that use custom
    components. The vulnerability does not impact apps hosted on Streamlit
    Cloud.

    We released a patch on the same night, July 27th, 2022 at 2:20PM PST,
    and ask that you immediately upgrade your Streamlit code to version
    1.11.1 or higher. You can read more in this vulnerability advisory

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  5. 0

    In my case, the fix was downgrading streamlit from v1.14.0 to v1.11.0.

    What didn’t work:

    1. --server.headless=true
    2. --server.enableCORS=false
    3. --server.enableWebsocketCompression=false

    How was the app deployed? GCS using Cloud Run

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