"Missing Trace Root" on v0.29

[Cyberax]

Summary

Upgrade to v0.29 results in "Missing Trace Root" traces. Downgrade to 0.28.1 resolves the issue.

Steps To Reproduce

Use the Go OTEL sample

	sp := sentryotel.NewSentrySpanProcessor()
	tracerProvider := sdktrace.NewTracerProvider(
		sdktrace.WithResource(serviceResource),
		sdktrace.WithSpanProcessor(sp),
	)

Expected Behavior

The trace root should be correct.

Screenshots

SDK

• sentry-go version: v0.29
• Go version: 1.22
• Using Go Modules? yes

Sentry

• Using hosted Sentry in sentry.io? yes

[cleptric]

We'll take a look.

[cleptric]

This is currently to be expected. The reason is adding support to something we call "Tracing without performance", a way to connect errors from different services together without the need to emit traces. As the payload of each event now always contains a parent_span_id, the product now displays "Missing Trace Root". We'll make the changes in Sentry itself. I'll get back here once I have a rough timeline.

[radazen]

@cleptric I may be wrong, but it feels like there's still a bug here. Note the part of the original screenshot where two different spans in the same trace have the same Span ID (2e28b774). This is happening to me as well! My top-level transaction span is what I'd expect to see as the Trace Root, and if I record a trace with a single span and no children, that's exactly what happens: I see a proper trace root, not a Missing Trace Root.

But if I record any child spans, the root transaction span ends up having its original Span ID overwritten by the span ID of one of the child spans, and I end up with two spans with the same Span ID and a Missing Trace Root.

[cleptric]

Yes, I was able to reproduce this and will look into a fix. Thanks @radazen for calling this out!

[bububa]

Same problem, really annoying on self host

[ribice]

@Cyberax / @radazen I was able to reproduce this as well using the tracing without performance, but downgrading to 0.28.1 lacks this feature, so I have to pull some commits in.

Could you share a larger snippet that can reproduce this issue (and works with previous sentry version)?