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fix(node): Pass inferred name & attributes to tracesSampler - #12945
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Lms24
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Jul 17, 2024
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Even if we can't get the final parameterized name in time, I think this is an improvement to what we had before so 👍
mydea
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Jul 17, 2024
| const spanOptions = getSpanOptions(options); | ||
| return tracer.startActiveSpan(name, spanOptions, ctx, span => { | ||
| _applySentryAttributesToSpan(span, options); |
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I noticed that this was actually also not ideal, we just added the op attribute after the span was started, which means this was not sent to the sampler. Also, this is overall unnecessary, we can just add the attribute right away!
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This was referenced Aug 27, 2024
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Previously, we passed the span name directly to the
tracesSampleras-is. However, this is not ideal because this does not match the name we actually send to sentry later, making this confusing. The reason is that we infer the name from the attributes for some types of spans, but we do that at export-time.This PR adjust this so that we send the inferred name & attributes to the
tracesSampler. This works reasonably enough. However, there is a big caveat: This still only has access to the initial attributes that a span has at creation time. This means that we'll never have e.g. thehttp.routecorrectly there, because allhttp.serverspans originate from the http instrumentation where they do not have a route yet, and then more specific instrumentation (e.g. express or fastify) add thehttp.routeto that span later. So the name will never be parametrized, for example, forhttp.serverspans, which is not ideal (as it will still not match the final span exactly) but should still be better than what we had so far (where the name would always just be e.g.GET).Fixes#12944