0.163.0

Images and binaries here: https://github.com/open-telemetry/opentelemetry-collector-releases/releases/tag/v0.163.0

End User Changelog

💡 Enhancements 💡

• 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)
• cmd/mdatagen: Generate exporter queue/batch sender defaults from an opt-in sending_queue field in metadata.yaml. See the batching migration RFC. (#15963) Declaring sending_queue is opt-in; an exporter that omits it is unaffected until it explicitly opts in one at a time during Phase 2 of the migration. Set MDATAGEN_SENDING_QUEUE_OPT_OUT=true to generate the standard default for every undeclared exporter while auditing a whole repository.
• 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.

🧰 Bug fixes 🧰

• 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/xpdata: Fix xhash producing the same hash for different maps by length-prefixing keys, strings and bytes. (#16048) All hash values produced by xhash change.

API Changelog

💡 Enhancements 💡

• pkg/component: Document compatibility guidelines for adding fields to public structs in the component interface RFC. (#16069)
• 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.

🧰 Bug fixes 🧰

• pkg/otelcol: Redact config opaque MapList values in unexpanded configuration snapshots (#15980)