Glossary term
What is programmer error? Meaning for developers
In Backend in Depth
A bug in the code, like reading a property of null. Log it with the stack trace and restart. Do not carry on in an unknown state.
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
A bug in the code, such as reading a property of undefined, after which the safest move is to restart.
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.