All Errors

This error occurs when attempting to use the worker_threads module in a Node.js environment where worker threads are unavailable, either due to an outdated version, custom build configuration, or missing experimental flags in older versions.

This error occurs when jwt.verify() receives an invalid or improperly formatted JSON Web Token. A valid JWT must have exactly three base64url-encoded parts separated by periods (header.payload.signature).

This fatal error occurs when Node.js runs out of memory trying to allocate space in the JavaScript heap. It typically happens when processing large datasets, running memory-intensive operations, or when there are memory leaks that gradually consume all available heap space.

This React 18 error occurs when you call startTransition with a callback that does not perform any state updates. startTransition is designed to mark state updates as low-priority transitions, so it expects at least one setState call within its callback function.

This error occurs when an exception is thrown inside a setTimeout callback function. Since the callback executes asynchronously, the error cannot be caught by outer try-catch blocks and will crash your application unless properly handled.

This error occurs when a write operation to a Node.js stream takes longer than the configured timeout threshold. It typically happens when downstream consumers are slow or unresponsive, causing backpressure to accumulate and the write operation to stall.

The useDeferredValue hook is a new concurrent feature introduced in React 18. Attempting to import or use this hook in React 17 or earlier versions will result in an error because the hook does not exist in those releases.

This error occurs when your Node.js server receives connections faster than it can accept them, causing the TCP backlog queue to overflow. The server cannot handle the rate of incoming connection requests, and the OS refuses further connection attempts.

This error occurs when you call resume() on a stream that is already in the reading state, indicating a mismatch between pause() and resume() calls. It typically happens with improper backpressure handling or calling resume() multiple times without corresponding pause() calls.

This error occurs when worker processes in a Node.js cluster module are trying to emit 'listening' events but no actual listening server exists in the worker processes. The cluster module expects workers to have a net.Server instance listening on a port to handle incoming connections.

This error occurs when Node.js DNS resolution exhausts all retry attempts after receiving SERVFAIL responses from the DNS server. SERVFAIL indicates the DNS server encountered an error and could not process the query, typically due to zone misconfiguration, DNSSEC validation failures, or temporary server problems.

The DNS NOTFOUND error occurs when a DNS server responds to a query but contains no answer records for the requested domain. This indicates the domain doesn't exist, is improperly configured, or the DNS server lacks the record information. This is different from timeouts or unreachable servers.

This error occurs when you attempt to use an unsupported character encoding with Node.js Buffer operations. Node.js only supports a limited set of standard encodings like utf8, ascii, hex, and base64. Using an invalid encoding name causes a RangeError.

This error occurs when you attempt to read from or write to a Buffer at an offset that is either negative or exceeds the buffer's bounds. Common when using Buffer methods like readUInt8(), write(), slice(), or copy() with invalid offset parameters.

This error occurs when an asynchronous operation takes longer than the specified timeout duration to complete. The promise remains in a pending state past its deadline, triggering a timeout rejection to prevent indefinite waiting.

HTTP 429 Too Many Requests indicates your Node.js application has exceeded the API rate limit. The server is asking your client to slow down request frequency.

This warning occurs when a Promise is rejected but no error handler catches the rejection. Starting from Node.js 15, unhandled promise rejections cause the application to terminate, making proper error handling critical for application stability.

This error occurs when attempting to send a message through a MessagePort that has already been closed or whose worker thread has terminated. The communication channel between the main thread and worker is no longer available.

React throws this error when useDeferredValue is called inside a conditional statement, loop, or nested function. All hooks must be called in the same order on every render to maintain state consistency.

This error occurs when you try to define a Client Component as an async function in React or Next.js. Client Components do not support async functions because they run in the browser where async component rendering is not yet supported. Only Server Components can be async, allowing them to await data directly in the component body.