Andrushika opened a new pull request, #71241: URL: https://github.com/apache/airflow/pull/71241
## Why I was using Git worktrees and accidentally ran `breeze start-airflow --dev-mode` from a second worktree. Breeze showed no warning, but the browser only showed a blank page. Root cause: the old Vite process still owned port 5173 or 5174, so the new Vite process exited silently because of `--strictPort` while Breeze continued starting Airflow and the browser kept loading assets from the old Vite server. ## What Check both ports before starting the background UI dev hook, and fail with a clear message when either port is in use. This only applies to dev asset compilation; regular UI asset builds are unchanged. This PR only handles port conflicts that already exist when `run_compile_ui_assets` starts. `compile_ui_assets_dev.py` still does not keep the `Popen` handles, so it cannot detect a Vite process that exits later. I plan to handle process supervision in a follow-up PR. --- ##### Was generative AI tooling used to co-author this PR? - [X] Yes — Codex (GPT-5) and Claude Code (Fable 5) Generated-by: Codex (GPT-5) and Claude Code (Fable 5) following [the guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
