v1.50.0

API

• Clarify that AttributesBuilder.put allows nulls
  (#​7271)
• Stabilize log record event name
  (#​7277)

Context

• Fix duplicated ExecutorService wrap
  (#​7245)
• Promote getAll to TextMapGetter stable API
  (#​7267)

Incubator

• Add ExtendedLogRecordBuilder#setException
  (#​7182)
• Add experimental support for log extended attributes
  (#​7123)

SDK

• Remove Java9VersionSpecific clock implementation
  (#​7221)
• Add addProcessorFirst to SdkTracerProviderBuilder, SdkLoggerProviderBuilder
  (#​7243)

Logs

• Add setLoggerConfigurator support to LoggerProvider
  (#​7332)

Metrics

• Add DelegatingMetricData
  (#​7229)
• Spatial aggregation for async instruments with filtering views
  (#​7264)

Exporters

• Prometheus: Add Authenticator support for PrometheusHttpServer
  (#​7225)
• OTLP: Fix OTLP metric exporter toBuilder() loosing temporality
  (#​7280)
• OTLP: Allow Otlp*MetricExporter's to publish export stats
  (#​7255)

Extensions

• Declarative config: Add support for escaping env var substitution
  (#​7033)
• Declarative config: update to opentelemetry-configuration 0.4
  (#​7064)
• Declarativeconfig: Refactor internals to add DeclarativeConfigContext
  (#​7293)

Project tooling

• Kotlin extension: Update min kotlin version to 1.8
  (#​7155)
• Add javadoc site crawler
  (#​7300,
  #​7316)

v1.49.0

SDK

Trace

• Avoid linear queue.size() calls in span producers by storing queue size separately
  (#​7141)

Exporters

• OTLP: Add support for setting exporter executor service
  (#​7152)
• OTLP: Refine delay jitter for exponential backoff
  (#​7206)

Extensions

• Autoconfigure: Remove support for otel.experimental.exporter.otlp.retry.enabled
  (#​7200)
• Autoconfigure: Add stable cardinality limit property otel.java.metrics.cardinality.limit
  (#​7199)
• Incubator: Add declarative config model customizer SPI
  (#​7118)