Unhandled rejections are not shown if using newrelic + winston logger

[alexey-yarmosh]

Description

Adding those lines makes app hide unhandled rejections. App just exits nothing related is shown in console:

// index.js

import winston from 'winston';
const logger = winston.createLogger();

throw new Error('this error not shown');

Expected Behavior

...
{"v":0,"level":30,"name":"newrelic","hostname":"MacBook-Pro-Alex.local","pid":54444,"time":"2024-02-09T16:12:19.342Z","msg":"Using New Relic for Node.js. Agent version: 11.10.3; Node version: v20.11.0."}
{"v":0,"level":40,"name":"newrelic","hostname":"MacBook-Pro-Alex.local","pid":54444,"time":"2024-02-09T16:12:19.342Z","msg":"New Relic for Node.js in worker_threads is not officially supported. Not starting! To bypass this, set `config.worker_threads.enabled` to true in configuration."}
file:///Users/baderfall/Documents/web/testing/nr-winston-demo/index.js:5
throw new Error('this error not shown');
      ^

Error: this error not shown
    at file:///Users/baderfall/Documents/web/testing/nr-winston-demo/index.js:5:7
    at ModuleJob.run (node:internal/modules/esm/module_job:218:25)
    at async ModuleLoader.import (node:internal/modules/esm/loader:329:24)
    at async loadESM (node:internal/process/esm_loader:28:7)
    at async handleMainPromise (node:internal/modules/run_main:113:12)

Node.js v20.11.0

Troubleshooting or NR Diag results

Steps to Reproduce

https://github.com/alexey-yarmosh/nr-winston-demo

Your Environment

Node version: v20.11.0
Operating System and version: MacOS 14.3

Additional context

[workato-integration]

https://new-relic.atlassian.net/browse/NR-223941

[bizob2828]

@alexey-yarmosh sorry the troubles. I was able to trace it down. Our instrumentation sets handleExceptions to true which means these get forwarded to new relic logs feature.

This is behaving as designed. Are you asking to actually see these and not have winston log and forward these to New Relic logs?

[alexey-yarmosh]

Indeed error is shown in New Relic logs. But all other logs are shown both there and in stdout. So to me, expected behaviour would be to see unhandled exception in stdout as well.

[bizob2828]

Yea let me dig. I'm not sure we can have both meaning it'll enqueue uncaught exceptions to New Relic logs and see it in stdout