Sentry Express + Serverless losing transaction

[hiroshinishio]

Is there an existing issue for this?

• [x] I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• [x] I have reviewed the documentation https://docs.sentry.io/
• [x] I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/node

SDK Version

8.33.1

Framework Version

express 4.18.2, serverless-http 3.1.1

Link to Sentry event

https://amplify-30.sentry.io/issues/5951306644/?environment=development&project=4506665822584832&query=is%3Aunresolved%20issue.priority%3A%5Bhigh%2C%20medium%5D&referrer=issue-stream&statsPeriod=1h&stream_index=0

Reproduction Example/SDK Setup

import {init, setupExpressErrorHandler} from '@sentry/node';
import {nodeProfilingIntegration} from '@sentry/profiling-node';

init({
  dsn: process.env.SENTRY_DSN,
  environment: 'development',

  integrations: [nodeProfilingIntegration()],

  tracesSampleRate: 1.0,
  profilesSampleRate: 1.0,
});

import express from 'express';
import serverless from 'serverless-http';

const app = express();

app.get('/debug-sentry/:test', (req, res) => {
  throw new Error('My first Sentry error!');
});

setupExpressErrorHandler(app);

export const handler = serverless(app);

Steps to Reproduce

Run the above file as a single file using serverless and serverless-offline plugin.

Then run curl http://localhost:3000/debug-sentry/hello

I've removed the serverless part and just started it as a raw express server using node index.js, which successfully logs the error, so it must be specific to the serverless-http wrapper.

I've also tried using @sentry/aws-serverless instead of @sentry/node which sadly logs nothing, presumably since express already handles the error.

Sentry 7 is logging errors correctly with the serverless + express combo.

Expected Result

Issue with URL, Headers & Query params

Actual Result

Also missing headers + query params

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