Next.js server action error handling and error metadata

[raine]

In next.js (v14), when error is thrown in a server action, it seems to be caught by some global error handler, so looks like there's been someone movement after this: #11709

1. I tried to use autoInstrumentServerFunctions: false to disable this global error handling, but it doesn't do it -- uncaught errors are still reported to Sentry. Is this config option actually for some other purpose?

2. I tried to do everything possible (Sentry.setTag etc.) to attach context to the error that is reported by the global error handler, but I just couldn't make it happen. Also, the errors don't seem to go through the beforeSend callback either, where they could be set. Any ideas? Thanks!

The use case is roughly:

"use server";

export async function triggerServerActionError() {
  // Attach metadata to this error that is captured by the Sentry next.js integration somewhere
  // If the error was reported here directly with Sentry.captureException(), the error would be reported twice.
  throw new Error("foo");
}

[lforst]

You haven't mentioned trying https://docs.sentry.io/platforms/javascript/guides/nextjs/manual-setup/#instrument-nextjs-server-actions

[raine]

Haven't no, but I don't want instrumentation, this is just for sending errors. Would seem like a bit heavy handed approach.