Sourced from opentelemetry-semconv's releases.

Version 1.15.0

This release targets the OpenTelemetry SDK 1.15.0.

API

• Add batch callback API, allowing a single callback to record measurements to multiple metric instruments.

SDK

Metrics

• SdkMeterProvider#toString() now returns a useful string describing configuration.
• Fix bug preventing proper function of Metrics SDK when multiple readers are present (#4436).
• Fix reporting intervals for metrics for delta readers (#4400).

Exporter

• BREAKING: merge all stable OTLP exporters into opentelemetry-exporter-otlp. opentelemetry-exporter-otlp-trace, opentelemetry-exporter-otlp-metrics, opentelemetry-exporter-otlp-http-trace, and opentelemetry-exporter-otlp-http-metrics are no longer published and their contents have been merged into a single artifact.
• BREAKING: merge log OTLP exporters into opentelemetry-exporter-otlp-logs. opentelemetry-exporter-otlp-http-logs is no longer published and its contents have been merged into a single artifact.
• Upgrade to OTLP protobuf version 0.18.0.
• RetryInterceptor retries on SocketTimeoutException with no message.
• Added JaegerGrpcSpanExporterBuilder#setMeterProvider(), enabling support of experimental jaeger span export metrics.
• DEPRECATION: the opentelemetry-exporter-jaeger-proto module containing jaeger proto definitions and corresponding generated classes is deprecated for removal in next major version.
• OTLP gRPC exporters support overriding :authority via OtlpGrpc*ExporterBuilder#addHeader("host", "my-authority-override").

SDK Extensions

• BREAKING: Move ConfigureableMetricExporterProvider from opentelemetry-sdk-extension-autoconfigure to stable opentelemetry-sdk-extension-autoconfigure-spi.
• Autoconfigure now supports multiple values for otel.metrics.exporter.
• Autoconfigure now supports general attribute limits, applicable to span attributes, span event attributes, span link attributes, and log attributes.
• Autoconfigure now supports an experimental option to disable the SDK. If otel.experimental.sdk.enabled=true, AutoConfiguredOpenTelemetrySdk#getOpenTelemetrySdk() returns a minimal (but not noop) OpenTelemetrySdk. The same minimal instance is set to GlobalOpenTelemetry.
• New "get or default" methods have been added to ConfigProperties. E.g. ConfigProperties#getString("otel.metrics.exporter", "otlp") fetches the value for the property otel.metrics.exporter and returns otlp if it is not set.
• Fix bug in ContainerResource provider that caused it to throw an exception in some instances when containerd is used.

Micrometer shim

• Cache descriptions such that metrics with the same name use the first seen description.

🙇 Thank you

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

@​anuraaga @​breedx-splk @​chenjazz @​cyrille-leclerc @​donce @​Donnerbart @​evantorrie @​jack-berg

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Sourced from opentelemetry-semconv's changelog.

Changelog

Unreleased

Version 1.16.0 (2022-07-13)

API

• Fix bug ImmutableKeyValuePairs implementation that causes ArrayIndexOutOfBoundsException to be thrown under certain conditions.

SDK

Traces

• Optimize BatchSpanProcessor using JcTools.

Metrics

• Tighten up exponential histogram implementation for alignment with specification: Default to 160 positive and negative buckets. Remove ability to configure starting scale. Minimum number of buckets is one instead of zero.
• Allow MetricExporter and MetricReader to influence default aggregation. The default aggregation is used when no registered views match an instrument.

Exporter

• Fix handling of client keys in PEM format.
• For OTLP exporters, change behavior to use OkHttpGrpcExporter (OkHttp implementation that doesn't use any gRPC dependencies) unless OtlpGrpc{Signal}Builder#setChannel(ManagedChannel) is called by user. Previously, OkHttpGrpcExporter was used if no gRPC implementation was found on classpath.
• Add support to configure default aggregation on OTLP metric exporters via Otlp{Protocol}MetricExporterBuilder#setDefaultAggregationSelector(DefaultAggregationSelector).

Testing

• Add span status assertions.

SDK Extensions

• Autoconfigure properly handles non-string system properties.
• Autoconfigure normalizes hyphens - to periods . when accessing ConfigProperties.

OpenTracing Shim

• Add support for span wrappers.
• Store OpenTracing SpanContext in OpenTracing Span wrapper.
• Use Baggage of active span.

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