Glossary term
What is operational error? Meaning for developers
In Backend in Depth
An expected failure in a correct program, like bad input, a missing record or a timeout. Handle it and report it.
Learn it properly · Backend in DepthLesson 4: Error Handling: Operational vs Programmer ErrorsOne central error handler, typed error classes, how Express 5 treats rejected promises, and when to let the process crash and restart.In Node.js From Zero
An expected problem in a correct program, such as a missing file or a timeout, that you handle.
Learn it properly · Node.js From ZeroLesson 6: Errors, Logging and Graceful ShutdownOperational versus programmer errors, uncaught exceptions, structured logs, health checks, and shutting down without dropping requests.