12 articles
RSSHow to fix Python aiosqlite errors — database is locked, WAL mode for concurrent reads, foreign_keys PRAGMA, row factory for dict-like rows, connection per request vs pool, datetime detect_types, and FastAPI integration.
How to fix Cloudflare Queues errors — producer queue.send not delivering, consumer not invoking, ack/retry/DLQ patterns, batch size limits, max_retries, content type pitfalls, and local dev with wrangler.
How to fix Node.js stream/promises pipeline errors — uncaught stream errors, backpressure ignored, AbortSignal not propagating, async iterators in pipeline, Transform stream object mode, and converting between Node and Web Streams.
How to fix Tortoise ORM errors — Tortoise.init not called, no module imported model, fetch_related missing, aerich migration setup, FastAPI integration patterns, and ConfigurationError missing connection.
How to fix asyncpg errors — connection refused localhost 5432, pool exhausted timeout, prepared statement does not exist, type codec not registered, JSON automatic conversion, and transaction rollback on exception.
How to fix Tenacity errors — retry decorator not retrying, stop_after_attempt vs stop_after_delay, retry_if_exception_type filter, async retry decorator, jitter for backoff, and RetryError unwrap original exception.
How to fix aiohttp errors — RuntimeError session is closed, ClientConnectorError connection refused, SSL verify failure, Unclosed client session warning, server websocket disconnect, and connector pool exhausted.
How to fix httpx errors — RuntimeError event loop is closed, ReadTimeout exception, ConnectionResetError, async client not closing properly, HTTP/2 not enabled, SSL verify failed, and proxy not working.
How to fix the JavaScript closure loop bug where all event handlers or setTimeout callbacks return the same value — using let, IIFE, bind, or forEach instead of var in loops.
How to fix Python asyncio not running — coroutines never executing, RuntimeError no running event loop, mixing sync and async code, and common async/await mistakes in Python.
How to fix UnhandledPromiseRejectionWarning in Node.js and unhandled promise rejection errors in JavaScript caused by missing catch handlers, async/await mistakes, and event emitter errors.
How to fix Jest 'Exceeded timeout of 5000ms for a test' errors caused by unresolved promises, missing done callbacks, async/await mistakes, and slow database or network calls in tests.