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v0.163.0Observability
Oct 14, 2026

OTHER 9

A maintenance release focused on performance and correctness fixes, with opt-in builder enhancements and new Profiles metadata behavior. It does not require forced operator configuration changes.

All 9 other recorded changesfixes 7 · additions 2

fixes (7)

  • - cmd/mdatagen: Replace the O(n) scan in generated recordDataPoint with an O(1) hash lookup, fixing an O(n²) cost per scrape when many data points land on one resource. (#15912)
  • - cmd/mdatagen: When both migration gates are enabled, only the latest metric with its v1 attributes is emitted (legacy attributes are no longer included). (#15979)
  • - pkg/exporterhelper: Fix sending queue deadlocks when blocked offers are cancelled with block_on_overflow enabled. (#15700)
  • - pkg/exporterhelper: Drop only the oversized profile when splitting a profiles batch, instead of discarding every profile queued behind it (#16087) Same fix as
  • - pkg/exporterhelper: Drop only the oversized span when splitting a traces batch, instead of discarding every span queued behind it (#16087) Same fix as
  • - pkg/pprofile: Use the profiles dictionary for resource and scope attribute strings sent over OTLP/gRPC. (#15861) The OTLP/gRPC profiles client now interns attribute strings before transmission, matching the OTLP/HTTP path. The server resolves the references before exposing pdata to consumers.
  • - pkg/otelcol: Redact config opaque MapList values in unexpanded configuration snapshots (#15980)

additions (2)

  • - cmd/builder: Add dist.resource.detection.detectors to the builder config, letting distributions opt into a smaller set of resourcedetectionprocessor detectors via generated go build tags. (#16075)
  • - pkg/pprofile: Implement Profiles development-version metadata in the OTLP receiver and exporters. (#16147, #16009) The receiver rejects malformed, repeated, or unsupported versions before decoding. OTLP exporters send the version associated with their compiled-in Profiles schema. The version is not configurable, and existing clients without metadata identify the initial development version.
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