NOTE: The opentelemetry-exporter-jaeger and opentelemetry-exporter-jaeger-thift artifacts have stopped being published. Jaeger has native support for OTLP, and users should export to jaeger using OTLP instead.

API

Incubator

• Add Span#addLink, for adding a link after span start (#6084)

SDK

Traces

• Bugfix: Ensure span status cannot be updated after set to StatusCode.OK (#6209

Metrics

• Reusable memory Mode: Adding support for exponential histogram aggregation (#6058, #6136)
• Reusable memory mode: Adding support for explicit histogram aggregation (#6153)
• Reusable memory mode: Adding support for sum aggregation (#6182)
• Reusable memory mode: Adding support for last value aggregation (#6196)

Exporters

• Recreate / fix graal issue detecting RetryPolicy class (#6139, #6134)
• Restore prometheus metric name mapper tests, fix regressions (#6138)
• WARNING: Remove jaeger exporters (#6119)
• Update dependency io.zipkin.reporter2:zipkin-reporter-bom to 3.2.1. Note: ZipkinSpanExporterBuilder#setEncoder(zipkin2.codec.BytesEncoder) has been deprecated in favor of ZipkinSpanExporterBuilder#setEncoder(zipkin2.reporter.BytesEncoder). ZipkinSpanExporterBuilder#setSender(zipkin2.reporter.Sender) has been deprecated in favor of ZipkinSpanExporterBuilder#setSender(zipkin2.reporter.BytesMessageSender). (#6129, #6151)
• Include trace flags in otlp marshaller (#6167)
• Add Compressor SPI support to OtlpGrpc{Signal}Exporters (#6103)
• Allow Prometheus exporter to add resource attributes to metric attributes (#6179)

Extension

• Autoconfigure accepts encoded header values for OTLP exporters (#6164)

Incubator

• Align file configuration with latest changes to spec (#6088)

Tooling

• Stop including old artifacts in bom (#6157)
• Define CODECOV token (#6186)

🙇 Thank you

This release was possible thanks to the following contributors who shared their brilliant ideas and awesome pull requests:

@apederson94 @asafm @breedx-splk @brunobat @codefromthecrypt @fstab @jack-berg @jkwatson @NicklasWallgren @patrick-me @psx95 @trask @zeitlinger