Node.js: UnhandledPromiseRejection: This error originated either by throwing inside of an async function
UnhandledPromiseRejection: This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated.
Immediate Remediation
typescript
Attach .catch() handler, wrap in try/catch within async functions, or add process.on("unhandledRejection", (err) => ...) logging.Root Cause Analysis
Encountered in Node.js when standard runtime constraints or configuration contracts are breached.
Verification & Guardrails
- Verified in production environments by TraceResolve SRE.
- Requires clean rebuild or service reload to take full effect.
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