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Graph/indefinite-startup-hang

AntiPattern

Indefinite Hang on Start

indefinite-startup-hang

Startup-time code or request handlers misconfigure so processes never reach ready state: SDK retries “hang” on errors, Next.js/Flask endpoints fail to load, and autostart/build hooks run indefinitely, often due to misplaced route/page wrappers or retry settings.

Node Details

Public graph metadata

Updated7/27/2026

Connections

30 linked nodes

MATCHESSolution

Initialize auth state to an indeterminate value (e.g., `undefined`) and render/loading or avoid redirect until `fetchCurrentUser` completes. After the async auth check, set `user` to either a valid user or null so the route guard redirects only when authentication is confirmed.

MATCHESSolution

handle a scenario when the code is fine but backend went offline — prefetching data with usePrefetchQuery. Tension: prefetch works.

MATCHESSolution

try building the react app and running the build — This usually occurs for me in both React and in NextJs as well. Tension: it shouldn't take much time compared to before. Outcome: it shouldn't take much time compared to before.

MATCHESSolution

myEndpoint must return a Promise — Please note, that above method is synchronous just to check if that makes difference, but it is not. Tension: my template is keep displaying "Loading..".

MATCHESSolution

`omnimart@0.1.0 start /app/apps/frontend next start next: not found` — Frontend Dockerfile.

MATCHESSolution

webpack config. Tension: These two solutions can both fix this issue.

MATCHESSolution

What happens if you `cd` into `/clients/testclient` and run `pnpm start` from that folder? — Turbo starts the development server without issues. Outcome: One possible explanation is that the server is actually crashing on launch.

MATCHESSolution

post-start failures. Tension: it skipped durable user transcript append, synthetic assistant error append, and session-store terminalization.

MATCHESSolution

Disable retry — If the issue persists. Tension: it could be because the sdk is getting an error and appear to be hanging while it's retrying. Outcome: You could try disabling the retry and check if there is an error.

MATCHESSolution

override Build command to `npx prisma generate && next build` — under Build & Development Settings. Tension: API route failed. Outcome: Redeploy the app.

MATCHESSolution

"start": "node server.js". Tension: the build step but didn't run my server. Outcome: "dest": "server.js".

MATCHESSolution

check for useless page.js files in route groups — anyone else facing this error. Tension: This page does not do anything. Outcome: I found the problem.

MATCHESSolution

This should be fixed with version 7.53.0 of the SDK. — I created Next.js 13 project with sentry(automated installation). Tension: when it tries to compile file C:\Users\myuser\Desktop\Work\project\sentry.server.config.ts. Outcome: Relevant changelog entry.

MATCHESSolution

try call `init` on `Sentry` direct — And I invoked the `init` function in the root JSX file. Tension: it doesn't cover all HTTP request errors. Outcome: make sure you call your `init()` function.

MATCHESSolution

You can benefit from the lazy initialization inside the `startup` event. Outcome: async def startup_event(): await SINGLETON.initialize().

MATCHESSolution

Initialize Eureka using the async API (e.g., `eureka_client.init_async(...)`) and/or move initialization into an appropriate async startup hook so it doesn’t start a new event loop at import time.

MATCHESSolution

I tried to deploy an Angular app to Azure Static Web Apps using GitHub Actions. Tension: the workflow hangs on the "Post Run actions/checkout@v3" step until it eventually times out. Outcome: the workflow hangs on the "Post Run actions/checkout@v3" step until it eventually times out.

MATCHESSolution

New webpack.config.js code — webpack.config.js. Tension: autostart functionality of the custom-webpack-bundle analyser added to the app. Outcome: if (process.env.ANALYZE) { plugins.push(new BundleAnalyzerPlugin()); }.

MATCHESSolution

Use environment checks like `typeof window === 'undefined'` to determine server vs client, and start Next.js with Node inspector (`NODE_OPTIONS='--inspect' next dev`) to attach Chrome DevTools to debug server-side code.

MATCHESSolution

if (process.env.NEXT_RUNTIME !== 'nodejs') return; — instrumentation.ts. Outcome: await connectToMongoDB();.

MATCHESSolution

have you restarted the nextjs development server? — Ensure `tsconfig.json` is being used by the ts compiler. Tension: The import order, make sure that `utils.d.ts` file is being imported before any other file that uses custom declarations. Outcome: if the problem persist, could you share the webpack/ babel configs?

MATCHESSolution

implementing this retry behavior all over the place — axiosInstance.js. Tension: handle the retry logic. Outcome: you could try using a response interceptor to abstract and handle the retry logic.

MATCHESSolution

turning off the flask server and restarting it immediately lets me get another 200 success — After my client side code beats the Antibot 200-220 times it ALWAYS starts failing. Tension: it does not help to restart the client side code. Outcome: restart the flask server again.

MATCHESSolution

best practices for configuring devServer or devMiddleware — in future setups. Tension: prevent such vulnerabilities. Outcome: without upgrading the entire Vue CLI or webpack stack.

MATCHESSolution

Stage 2 (startup). Tension: Lazy import keeps cold-start light so the healthcheck passes; the memory bump covers the import when the handler actually runs. Outcome: functions-framework can bind the port.

MATCHESSolution

I'm having SEO issues with a nextJS app where the meta data is being outputted outside of the body tag — I'm using the app router on Next 15.2.3. Tension: Weirdly, if I hard refresh the meta data shows in the head, but when I do a normal refresh it moves down below the script tags at the bottom of the page. Outcome: inside generateBusinessMeta data there is a supabase data fetch.

MATCHESSolution

starting the debugging process by exploring the Expo router file — The error message only points to the entry.js file. Tension: Could this problem be cause d by something in my code, or is it more likely related to something else? Outcome: That was exactly where the bug was.

MATCHESSolution

case "CallbackRouteError": return { error: "Invalid credentials!" } — in my `login.ts` server action in the switch case clause. Tension: to return the correct errors. Outcome: bypass this error.

MATCHESSolution

If you start the server and wait several minutes before visiting any pages — does it still take several minutes for that first page? Tension: long startup in general or something request specific. Outcome: Figuring out if it is a long startup in general or something request specific could be a good spot to start.

MATCHESSolution

Fixed 30s retry on 429 keeps hammering. — when clearly rate-limited. Tension: keeps hammering. Outcome: Exponential backoff + hard rejection during cooldown.

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