mlx-ui logs show session error messages

[ckadner]

Describe the bug

The logs of the MLX UI show error messages like these:

[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/DVYkJydSnkjCT8jamfyVB9DWjCDFF0W6.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/DVYkJydSnkjCT8jamfyVB9DWjCDFF0W6.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/DVYkJydSnkjCT8jamfyVB9DWjCDFF0W6.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/DVYkJydSnkjCT8jamfyVB9DWjCDFF0W6.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/DVYkJydSnkjCT8jamfyVB9DWjCDFF0W6.json'

Steps to Reproduce

Deploy MLX and open the MLX web UI while tailing the logs of the mlx-ui pod/container.

Logs:

$ kubectl -n kubeflow logs -f mlx-ui-755456f99-4bpfh


> aiops-frontend@0.1.0 build
> react-scripts build

Creating an optimized production build...
Compiled successfully.

File sizes after gzip:

  343.26 KB  build/static/js/2.d6682b1c.chunk.js
  62.85 KB   build/static/js/main.4d6ec1c7.chunk.js
  3.84 KB    build/static/css/main.265e3da4.chunk.css
  2.72 KB    build/static/css/2.21151bd0.chunk.css
  780 B      build/static/js/runtime-main.b8b6e910.js

The project was built assuming it is hosted at ./.
You can control this with the homepage field in your package.json.

The build folder is ready to be deployed.

Find out more about deployment here:

  bit.ly/CRA-deploy

npm notice 
npm notice New minor version of npm available! 8.11.0 -> 8.13.0
npm notice Changelog: <https://github.com/npm/cli/releases/tag/v8.13.0>
npm notice Run `npm install -g npm@8.13.0` to update!
npm notice 
[HPM] Proxy created: /  ->  http://mlx-api
Server listening at http://localhost:3000
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'
[session-file-store] will retry, error on last attempt: Error: ENOENT: no such file or directory, open 'sessions/JILS35zOlw0Nz35p2aL4pOYTD_5XlpPv.json'

This could be related to recent changes (#339) in the mlx-ui container image to run as non-root user:

Also see:

• ENOENT: no such file or directory, open 'sessions/.json' valery-barysok/session-file-store#26 (comment)

  fix it by chmod +x sessions

• ENOENT: no such file or directory, open 'sessions/.json' valery-barysok/session-file-store#26 (comment)

  res.clearCookie(options.name); ... works like a charm