NOTE: This release contains non-backward compatible breaking API and SDK changes
- Introduction of immutable Attributes for Spans, Events, Links and Resources
- Introduction of immutable Labels for Metric Instruments and Recordings
- BUGFIX: make sure null Points are not propagated to metric exporters
- Added a propagator for AWS X-Ray
- BUGFIX: IntervalMetricReader now handles exceptions thrown by metric exporters
- Renamed contrib modules to "extensions" (Note: this changes the published artifact names, as well)
- Converted CorrelationContext entry keys and values to simple Strings
- Enhanced OTLP exporter configuration options
- Added new SDK Telemetry Resource populator
- Introduced an new MultiTracePropagator to handle multiple propagation formats
- Added new AWS Resource populators
- Added an extension to populate span data into log4j2 log formats.
- Changed the MinMaxSumCount aggregations for ValueRecorders to always aggregate deltas, rather than cumulative
- Updated the OTLP protobuf and exporter to version 0.4.0 of the OTLP protobufs.