traceSampler doesn't work with @sentry/cloudflare

[jahands]

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?

Self-hosted/on-premise

Which SDK are you using?

@sentry/cloudflare

SDK Version

10.23.0

Framework Version

plain fetch handler

Link to Sentry event

No response

Reproduction Example/SDK Setup

// index.ts
export default Sentry.withSentry(
	(env: Env) => ({
		dsn: env.SENTRY_DSN,
		tracesSampleRate: 1.0, // should be ignored, but we sample anyway
		traceSampler: (env: Env) => {
			return 0.0 // doesn't work
		}}),
	{
		fetch: (req: Request) => new Response('hello')
	}
)

Steps to Reproduce

try using traceSampler with Cloudflare workers

Expected Result

traceSampler function to be invoked and control sampling

Actual Result

traceSampler is ignored and only traceSampleRate works

Additional Context

_{Tip: React with 👍 to help prioritize this issue. Please use comments to provide useful context, avoiding +1 or me too, to help us triage it.}

[linear]

JS-1131

[andreiborza]

Hi @jahands, thanks for filing this.

Does it work when you don't set traceSampleRate? We'll take a look.

cc @JPeer264

[jahands]

no - if I only set traceSampler, it doesn't trace at all

[andreiborza]

@jahands ah, one thing I just noticed: the option is called tracesSampler not traceSampler (notice the missing s in your version).

Could that be the issue?