tRPC server errors not sent from vercel deployment. Local works fine

[MathiasGruber]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• 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/nextjs

SDK Version

9.38.0

Framework Version

15.4.1

Link to Sentry event

No response

Reproduction Example/SDK Setup

https://github.com/studie-tech/TheNinjaRPG

I believe the most relevant files are:

https://github.com/studie-tech/TheNinjaRPG/blob/main/app/instrumentation.ts
https://github.com/studie-tech/TheNinjaRPG/blob/main/app/sentry.server.config.ts
https://github.com/studie-tech/TheNinjaRPG/blob/main/app/src/app/api/trpc/%5Btrpc%5D/route.ts

Specifically, I have implemented Sentry.flush as I thought that was the most likely culprit, but to no avail.

Steps to Reproduce

Whenever I trigger an error in a tRPC endpoint on purpose, I get the error when working from local, but not when deployed on vercel. The full configuration can be seen here:
studie-tech/TheNinjaRPG

I'm not using environment variables for the DSN, which seems to be a common cause of this. I've gone through the entire setup of Sentry again.

This worked a few months ago when initially set up, but has since then been broken.

Expected Result

Expect similar behavior on local and vercel deployment

Actual Result

No errors reported from vercel

[linear]

JS-734 tRPC server errors not sent from vercel deployment. Local works fine

[s1gr1d]

Hello, most often this can be solved by flushing (as you already tried). I also see that you tried another flushing approach in the latest commit which was just 3 hours ago (this issue is 16h old now). Did that work for you now?

The reason for a need to flush is that the function may have a limited execution time and the error cannot be sent anymore. By awaiting a flush, the function executes a little longer.

[MathiasGruber]

Nope, as you mentioned I tried a few different flusing methods, but to no avail.

[s1gr1d]

We're gonna have a look at this!

cc @chargome