Stuck on Please wait... stage on AWS EC2 machine

[kousikan]

Summary

Stuck on Please wait... stage. on AWS EC2 machine. Working in local machine. Tried everything in Section 2 in the web page https://docs.streamlit.io/en/stable/troubleshooting/not-loading.html

Steps to reproduce

What are the steps we should take to reproduce the bug:

pipenv --python 3.8.6
pipenv -v install streamlit
streamlit hello

Expected behavior:

The app to work. on the IP eg http://xx.xx.xx.xx:8501

Actual behavior:

stuck on the Please wait....

Is this a regression?

That is, did this use to work the way you expected in the past?
no

Debug info

• Streamlit version: (get it with $ streamlit version) : Streamlit, version 0.71.0
• Python version: (get it with $ python --version): Python 3.8.6
• Using Conda? PipEnv? PyEnv? Pex? Pipenv
• OS version: NAME="Amazon Linux AMI"
  VERSION="2018.03"
  ID="amzn"
  ID_LIKE="rhel fedora"
  VERSION_ID="2018.03"
  PRETTY_NAME="Amazon Linux AMI 2018.03"
  ANSI_COLOR="0;33"
  CPE_NAME="cpe:/o:amazon:linux:2018.03:ga"
  HOME_URL="http://aws.amazon.com/amazon-linux-ami/"
• Browser version: Google Chrome Version 87.0.4280.67 (Official Build) beta (x86_64)

Additional information

Attached the har archive. When I inspected the web page it seems like Web socket connection is being refused. Tried everything in Section 2 in the web page https://docs.streamlit.io/en/stable/troubleshooting/not-loading.html

It seems the port is open
nc -vz xx.xx.xx.xx 8501
Connection to xx.xx.xx.xx 8501 port [tcp/*] succeeded!

10.5.51.11.har.zip

[bfgdigital]

Having the same issue.

[ZupoLlask]

Do you think this may be related with #2312?

[kmcgrady]

Hey @kousikan ! Thank you for reporting the issue. Unfortunately, I'm not as familiar with EC2 functionality and what could be wrong between Streamlit and EC2 without analyzing your instance. I'll make note to and put it in our list of requests to improve deployment troubleshooting.

[gabrielecalvo]

Hi all,
Not sure it is a AWS issue alone, I get a very similar issue on Azure and so does this other person.
In fairness, I even tried going back to using streamlit==0.61 tornado==5.1.1 source which does not solve the issue.
Hope that helps.

[kousikan]

This was a firewall issue. Websocket protocol traffic should be allowed to & from the streamlit app under appgroups. Our networking team was able to resolve this.

[kmcgrady]

Thanks for the discussion! I will close this issue since it looks like the websocket protocol traffic needs to be allowed. Please re-open if there is any reason to 😊 .