Native Tools for the Official Sentry Node.js SDK


Installation

``bash


Using yarn

yarn add @sentry/node @sentry/node-native

Using npm

npm install --save @sentry/node @sentry/node-native
`

eventLoopBlockIntegration

The eventLoopBlockIntegration can be used to monitor for blocked event loops in
all threads of a Node.js application.

If you instrument your application via the Node.js --import flag, Sentry will
be started and this instrumentation will be automatically applied to all worker
threads.

instrument.mjs

`javascript
import * as Sentry from '@sentry/node';
import { eventLoopBlockIntegration } from '@sentry/node-native';

Sentry.init({
dsn: '__YOUR_DSN__',
// Capture stack traces when the event loop is blocked for more than 500ms
integrations: [eventLoopBlockIntegration({ threshold: 500 })],
});
`

app.mjs

`javascript
import { Worker } from 'worker_threads';

const worker = new Worker(new URL('./worker.mjs', import.meta.url));

// This main thread will be monitored for blocked event loops
`

worker.mjs

`javascript
// This worker thread will also be monitored for blocked event loops too
`

Start your application:

`bash
node --import instrument.mjs app.mjs
``

If a thread is blocked for more than the configured threshold, stack traces will
be captured for all threads and sent to Sentry.