NestJS · Senior · Question 66 of 75

What does `onApplicationShutdown(signal)` receive and why is it useful?

1The last HTTP request
2The list of errors since start
✓Correct answer: The signal that triggered shutdown (e.g. SIGTERM), so you can log it and adjust cleanup

Explanation

It runs after connections are closed by the HTTP server, as the last chance to flush logs or metrics.

Further reading

NestJS: Lifecycle events ↗

Test yourself

Take the NestJS · Senior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.