Async Errors
- What does UnhandledPromiseRejectionWarning mean in Node.js?
It means a Promise was rejected and no .catch() or try/catch handled the rejection, so Node.js warns you about the unhandled error. - How do I fix a deadlock in async code?
Fix a deadlock by ensuring locks are acquired in a consistent order, using timeouts, or avoiding blocking calls inside async functions that hold a lock.