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A heavy MakerWorld model — one Bambu Studio also takes a long time over —
failed after five minutes with "Slicer sidecar unreachable". The sidecar
was reachable the whole time and still slicing when we hung up on it.
SlicerApiService carried a hardcoded 300s timeout, passed to httpx as a
bare float so it covered connect, read, write and pool alike. On a single
long request that is not a health check, it is a cap on how long a model is
allowed to take. And because httpx.ReadTimeout subclasses RequestError,
expiry landed in the same handler as a refused connection and was reported
as an unreachable sidecar — so the reporter went and updated their sidecar
container, which was never the problem.
The information to do better was already being collected. _poll_progress
polls /slice/progress/{id} once a second alongside the blocking POST to
drive the live progress toast, so at minute five Bambuddy had fresh
evidence the slicer was working. It killed the request anyway.
So the read timeout comes off the HTTP call and the poller supervises
instead: the deadline moves forward on every progress update, and only
genuine silence ends the wait. A model that keeps reporting runs to
completion however long it takes. Connect and pool keep short timeouts —
a sidecar that will not accept a connection is unreachable and should
still say so quickly.
Only a *changed* progress payload counts as alive. The sidecar re-serves
its last snapshot on every poll, so counting repeats would leave the
watchdog unable to detect a stall at all.
The window is floored at three poll intervals: liveness can only be
observed as fast as the poller ticks, so anything shorter would expire in
the gap between two polls and fail every slice instantly.
New setting slicer_stall_timeout_minutes (Settings > Workflow > Slicer),
default 15, range 1-240, alongside the sidecar URL and gated on
use_slicer_api like its neighbours. Sidecars too old to report progress
have no liveness signal, so for those the same number bounds total elapsed
time — the old behaviour, configurable and no longer 300s flat. The
message says which case applies and where to change it.
SlicerTimeoutError is its own type and maps to 504, not 502: the sidecar
answered throughout, we stopped waiting. Connection failures keep
SlicerApiUnavailableError. The preview slice path gets the same treatment.
React + TypeScript + Vite
This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
Currently, two official plugins are available:
- @vitejs/plugin-react uses Babel (or oxc when used in rolldown-vite) for Fast Refresh
- @vitejs/plugin-react-swc uses SWC for Fast Refresh
React Compiler
The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see this documentation.
Expanding the ESLint configuration
If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
export default defineConfig([
globalIgnores(['dist']),
{
files: ['**/*.{ts,tsx}'],
extends: [
// Other configs...
// Remove tseslint.configs.recommended and replace with this
tseslint.configs.recommendedTypeChecked,
// Alternatively, use this for stricter rules
tseslint.configs.strictTypeChecked,
// Optionally, add this for stylistic rules
tseslint.configs.stylisticTypeChecked,
// Other configs...
],
languageOptions: {
parserOptions: {
project: ['./tsconfig.node.json', './tsconfig.app.json'],
tsconfigRootDir: import.meta.dirname,
},
// other options...
},
},
])
You can also install eslint-plugin-react-x and eslint-plugin-react-dom for React-specific lint rules:
// eslint.config.js
import reactX from 'eslint-plugin-react-x'
import reactDom from 'eslint-plugin-react-dom'
export default defineConfig([
globalIgnores(['dist']),
{
files: ['**/*.{ts,tsx}'],
extends: [
// Other configs...
// Enable lint rules for React
reactX.configs['recommended-typescript'],
// Enable lint rules for React DOM
reactDom.configs.recommended,
],
languageOptions: {
parserOptions: {
project: ['./tsconfig.node.json', './tsconfig.app.json'],
tsconfigRootDir: import.meta.dirname,
},
// other options...
},
},
])