Emit schema url from HTTP instrumentations #15144
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trask
commented
Oct 25, 2025
| .addAttributesExtractors(additionalExtractors) | ||
| .addOperationMetrics(HttpClientMetrics.get()); | ||
| .addOperationMetrics(HttpClientMetrics.get()) | ||
| .setSchemaUrl(SchemaUrls.V1_37_0); |
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I think it makes sense to set schema url to the most recent version of schema that the instrumentation conforms to(?)
cc @lmolkova
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I've added this to next week's Semantic Convention SIG meeting to get feedback
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The test framework was not copying the schema URL from the protobuf ScopeSpans to the InstrumentationScopeInfo when converting spans, causing all schema URL assertions to fail even though spans were correctly emitting schema URLs.
The instrumenterBuilder() method in DefaultHttpClientInstrumenterBuilder was creating new Instrumenter builders without setting the schema URL. This affected connection-level instrumentations (e.g., Netty connection spans for error cases) which use this method to create their instrumenters. Fixes failing tests in finagle-http-23.11 where connection error spans were missing the schema URL.
The TelemetryConverter now correctly preserves schema URLs from protobuf data. The MeterTest files create meters with schema URL 'http://schema.org', so the test expectations need to be updated to match.
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Related to #12846