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feat(core): Add updateSpanName helper function #14291

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merged 18 commits into from
Dec 16, 2024

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@Lms24 Lms24 commented Nov 14, 2024

TL;DR: This PR Adds Sentry.updateSpanName() to reliably update span names in OpenTelemetry environments; prevents overwrites from both OpenTelemetry HTTP instrumentation and Sentry's span inference logic; preserves custom names by marking them with 'custom' source and storing in temp field which takes precedence over the actual name and gets deleted at the end

"Why not use span.updateName()?", the avid SDK user might ask. Here's why:

In our Node SDK, most/all spans are created by OpenTelemetry instrumentation. OpenTelemetry has no concept of a transaction source and only stores the name of the span in the Span instance. Some instrumentation, most importantly, @opentelemetry/instrumentation-http starts a span (in this case root span) and later on updates the name. In the http case, this update happens at the end of the request lifecycle. Consequently, any span name updates prior to this call, regardless of them coming from our SDK or from users, are overwritten.

In addition to this limitation within Otel instrumentation, we also have our own span name, op and source inference logic which we apply when exporting the span to add Sentry-specific data (like a better span name, an op, a transaction source and additional data) to otel-generated spans. So even if Otel didn't call updateName() in its instrumentation, user-made updateName calls to e.g. http.server spans were also overwritten by our logic.

So we need some way of 1. bypassing our span inference logic and 2. ensuring a user-update span name has precedence over otel's span name updates.

1 we can achieve with setting the source attribute to custom and ensuring we don't change the span name if we encounter a custom source.
2 we can only achieve if we write the user-updated span name to temporary field on the span and apply it during our span name processing logic.

This is exactly what updateSpanName does:

  • update the span name via span.updateName()
  • add SEMANTIC_ATTRIBUTES_SENTRY_SOURCE: 'custom to the span
  • add a temporary attribute with the provided name to the span

Further changes in this PR:

  • Ensure we use the span name from temporary attribute if provided in parseSpanDescription
  • Ensure we respect source custom in parseSpanDescription
  • Delete the temporary attribute when creating the transaction envelope (no need to send this)
  • Add a bunch of unit and integration tests for the newly added function.
  • Also add two unit tests showing that span.updateName has no effect on http.server spans, even if you set source custom

This PR supersedes #14280 where I thought we could monkey-patch span.updateName directly to make updating the span name AND the source more consistent without a new top-level function. Turns out, we cannot do this because then, Otel instrumentation would also call the monkey-patched version of updateName, meaning we can no longer distinguish between user-made and otel-made span name updates.

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github-actions bot commented Nov 14, 2024

size-limit report 📦

Path Size % Change Change
@sentry/browser 23.29 KB - -
@sentry/browser - with treeshaking flags 21.96 KB - -
@sentry/browser (incl. Tracing) 35.81 KB +0.06% +20 B 🔺
@sentry/browser (incl. Tracing, Replay) 73.05 KB +0.06% +42 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 63.44 KB +0.05% +31 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas) 77.36 KB +0.05% +37 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback) 89.84 KB +0.04% +30 B 🔺
@sentry/browser (incl. Feedback) 40.04 KB - -
@sentry/browser (incl. sendFeedback) 27.89 KB - -
@sentry/browser (incl. FeedbackAsync) 32.68 KB - -
@sentry/react 25.96 KB - -
@sentry/react (incl. Tracing) 38.64 KB +0.1% +36 B 🔺
@sentry/vue 27.52 KB +0.11% +30 B 🔺
@sentry/vue (incl. Tracing) 37.67 KB +0.11% +39 B 🔺
@sentry/svelte 23.45 KB - -
CDN Bundle 24.47 KB +0.19% +46 B 🔺
CDN Bundle (incl. Tracing) 37.51 KB +0.16% +58 B 🔺
CDN Bundle (incl. Tracing, Replay) 72.69 KB +0.08% +56 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) 78.09 KB +0.1% +79 B 🔺
CDN Bundle - uncompressed 71.85 KB +0.15% +109 B 🔺
CDN Bundle (incl. Tracing) - uncompressed 111.23 KB +0.17% +185 B 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed 225.28 KB +0.09% +185 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 238.5 KB +0.08% +185 B 🔺
@sentry/nextjs (client) 38.9 KB +0.05% +16 B 🔺
@sentry/sveltekit (client) 36.32 KB +0.1% +36 B 🔺
@sentry/node 162.68 KB +0.11% +170 B 🔺
@sentry/node - without tracing 98.86 KB +0.16% +152 B 🔺
@sentry/aws-serverless 126.52 KB +0.11% +134 B 🔺

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@Lms24 Lms24 force-pushed the lms/feat-span-updatename-wrapper branch from 70674de to c7b6718 Compare November 14, 2024 14:58
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❌ We are unable to process any of the uploaded JUnit XML files. Please ensure your files are in the right format.

@Lms24 Lms24 marked this pull request as ready for review November 14, 2024 16:23
@Lms24 Lms24 requested review from mydea and andreiborza November 14, 2024 16:23
@@ -172,6 +296,26 @@ describe('descriptionForHttpMethod', () => {
source: 'url',
},
],
[
'works with prefetch request',
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This is just an additional test I added because we didn't test the condition to add .prefetch to the op.

// if http.method exists, this is an http request span
// eslint-disable-next-line deprecation/deprecation
const httpMethod = attributes[ATTR_HTTP_REQUEST_METHOD] || attributes[SEMATTRS_HTTP_METHOD];
if (httpMethod) {
return descriptionForHttpMethod({ attributes, name, kind }, httpMethod);
return descriptionForHttpMethod({ attributes, name: getOriginalName(spanName, attributes), kind }, httpMethod);
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m: Instead of repeating getOriginalName, can we just do this at the very top of this method and then use this processed name everywhere below?

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I wanted to do this initially but then we'd potentially lose the inferred op, no?

@Lms24 Lms24 force-pushed the lms/feat-span-updatename-wrapper branch from adee375 to 24e8320 Compare December 13, 2024 09:41
@Lms24 Lms24 requested a review from mydea December 13, 2024 11:31
@Lms24 Lms24 merged commit f8ac98d into develop Dec 16, 2024
159 checks passed
@Lms24 Lms24 deleted the lms/feat-span-updatename-wrapper branch December 16, 2024 15:30
Lms24 added a commit that referenced this pull request Dec 16, 2024
Add `Sentry.updateSpanName()` to reliably update span
names in OpenTelemetry environments; prevents overwrites from both
OpenTelemetry HTTP instrumentation and Sentry's span inference logic;
preserves custom names by marking them with 'custom' source and storing
in temp field which takes precedence over the actual name and gets
deleted at the end
Lms24 added a commit that referenced this pull request Dec 17, 2024
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2 participants