Version 1.20.0

API

• Fix bug in W3CBaggagePropagator that caused + characters to be decoded as whitespace . (#4898)

API Extensions

• DEPRECATION: the opentelemetry-extension-aws module containing various AwsXrayPropagator implementations has been deprecated for removal in next major version. A copy of the code will instead be maintained in opentelemetry-java-contrib/aws-xray-propagator and published under coordinates io.opentelemetry.contrib:opentelemetry-aws-xray-propagator:{version}. (#4862)

SDK

Traces

• Add graal hints for shaded dependencies, allowing JcTools queue to be used in graal environment. (#4832)
• Sampler#getDescription() implementations are now locale independent. (#4877)
• Allow SDK to run in environments prohibiting use of sun.misc.Unsafe. (#4902)

Metrics

• Add toString to AbstractInstrument. (#4833)
• Add zero bucket boundary to default explicit bucket histogram aggregation. (#4819)

Logs

• Optimize log hot path, reducing allocations significantly. (#4913)
• BREAKING: Add Context argument to LogRecordProcessor#onEmit. (#4889)

Exporter

• OtlpLogging{Signal}Exporters encode enums as numbers. (#4783)
• Add User-Agent header of OTel OTLP Exporter Java/{version} to OTLP export requests. (#4784)

SDK Extensions

• WARNING: opentelemetry-sdk-extension-aws has been removed following its relocation to opentelemetry-java-contrib/instrumentation-aws-xray, which is published under coordinates io.opentelemetry.contrib:opentelemetry-aws-resources:{version}. We will push security patches to 1.19.x as needed. The latest opentelemetry-bom will point to the latest published version, currently 1.19.0. (#4830)
• WARNING: opentelemetry-sdk-extension-resources has been removed following its relocation to opentelemetry-java-instrumentation/instrumentation/resources/library, which is published under coordinates io.opentelemetry.instrumentation:opentelemetry-resources:{version}. We will push security patches to 1.19.x as needed. The latest opentelemetry-bom will point to the latest published version, currently 1.19.0. (#4828)
• Add autoconfigure support for BatchLogRecordProcessor. (#4811)
• Autoconfigure performs percent decoding on otel.resource.attributes values. (#4653)
• Unify compression configuration for exporters including (#4775): * Fix handling of none in OTLP exporters. * Add JaegerGrpcSpanExporterBuilder#setCompression(String). * Add ZipkinSpanExporterBuilder#setCompression(String).

Semantic Conventions

• Add migration notes to deprecated attributes (#4840)

OpenTracing Shim

• Use opentracing-shim as instrumentation scope name. (#4890)
• Add full support for multiple parents. (#4916)

🙇 Thank you

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

@amouhadi
@bogdandrutu
@breedx-splk
@carlosalberto
@codeboten
@Donnerbart
@fniephaus
@jack-berg
@jkwatson
@jsuereth
@kubawach
@lgfa29
@lmonkiewicz
@lukiano
@marcingrzejszczak
@mateuszrzeszutek
@mkorzeniewski
@reyang
@rrva
@sdeleuze
@trask