Release v1.23.0/v0.45.1

This release contains the first stable, v1, release of the following modules:

• go.opentelemetry.io/otel/bridge/opencensus
• go.opentelemetry.io/otel/bridge/opencensus/test
• go.opentelemetry.io/otel/example/opencensus
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp
• go.opentelemetry.io/otel/exporters/stdout/stdoutmetric

See our versioning policy for more information about these stability guarantees.

Added

• Add WithEndpointURL option to the exporters/otlp/otlpmetric/otlpmetricgrpc, exporters/otlp/otlpmetric/otlpmetrichttp, exporters/otlp/otlptrace/otlptracegrpc and exporters/otlp/otlptrace/otlptracehttp packages. (#4808)
• Experimental exemplar exporting is added to the metric SDK. See metric documentation for more information about this feature and how to enable it. (#4871)
• ErrSchemaURLConflict is added to go.opentelemetry.io/otel/sdk/resource. This error is returned when a merge of two Resources with different (non-empty) schema URL is attempted. (#4876)

Changed

• The Merge and New functions in go.opentelemetry.io/otel/sdk/resource now returns a partial result if there is a schema URL merge conflict. Instead of returning nil when two Resources with different (non-empty) schema URLs are merged the merged Resource, along with the new ErrSchemaURLConflict error, is returned. It is up to the user to decide if they want to use the returned Resource or not. It may have desired attributes overwritten or include stale semantic conventions. (#4876)

Fixed

• Fix ContainerID resource detection on systemd when cgroup path has a colon. (#4449)
• Fix go.opentelemetry.io/otel/sdk/metric to cache instruments to avoid leaking memory when the same instrument is created multiple times. (#4820)
• Fix missing Mix and Max values for go.opentelemetry.io/otel/exporters/stdout/stdoutmetric by introducing MarshalText and MarshalJSON for the Extrema type in go.opentelemetry.io/sdk/metric/metricdata. (#4827)

New Contributors

• @Fricounet made their first contribution in #4449
• @StLeoX made their first contribution in #4855
• @m-posluszny made their first contribution in #4827

Full Changelog: v1.22.0...v1.23.0

Release v1.23.0-rc.1

This is a release candidate for the v1.23.0 release. That release is expected to include the v1 release of the following modules:

• go.opentelemetry.io/otel/bridge/opencensus
• go.opentelemetry.io/otel/bridge/opencensus/test
• go.opentelemetry.io/otel/example/opencensus
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp
• go.opentelemetry.io/otel/exporters/stdout/stdoutmetric

See our versioning policy for more information about these stability guarantees.

Release v1.22.0/v0.45.0

Added

• The go.opentelemetry.io/otel/semconv/v1.22.0 package.
  The package contains semantic conventions from the v1.22.0 version of the OpenTelemetry Semantic Conventions. (#4735)
• The go.opentelemetry.io/otel/semconv/v1.23.0 package.
  The package contains semantic conventions from the v1.23.0 version of the OpenTelemetry Semantic Conventions. (#4746)
• The go.opentelemetry.io/otel/semconv/v1.23.1 package.
  The package contains semantic conventions from the v1.23.1 version of the OpenTelemetry Semantic Conventions. (#4749)
• The go.opentelemetry.io/otel/semconv/v1.24.0 package.
  The package contains semantic conventions from the v1.24.0 version of the OpenTelemetry Semantic Conventions. (#4770)
• Add WithResourceAsConstantLabels option to apply resource attributes for every metric emitted by the Prometheus exporter. (#4733)
• Experimental cardinality limiting is added to the metric SDK.
  See metric documentation for more information about this feature and how to enable it. (#4457)
• Add NewMemberRaw and NewKeyValuePropertyRaw in go.opentelemetry.io/otel/baggage. (#4804)

Changed

• Upgrade all use of go.opentelemetry.io/otel/semconv to use v1.24.0. (#4754)
• Update transformations in go.opentelemetry.io/otel/exporters/zipkin to follow v1.24.0 version of the OpenTelemetry specification. (#4754)
• Record synchronous measurements when the passed context is canceled instead of dropping in go.opentelemetry.io/otel/sdk/metric.
  If you do not want to make a measurement when the context is cancelled, you need to handle it yourself (e.g if ctx.Err() != nil). (#4671)
• Improve go.opentelemetry.io/otel/trace.TraceState's performance. (#4722)
• Improve go.opentelemetry.io/otel/propagation.TraceContext's performance. (#4721)
• Improve go.opentelemetry.io/otel/baggage performance. (#4743)
• Improve performance of the (*Set).Filter method in go.opentelemetry.io/otel/attribute when the passed filter does not filter out any attributes from the set. (#4774)
• Member.String in go.opentelemetry.io/otel/baggage percent-encodes only when necessary. (#4775)
• Property.Value in go.opentelemetry.io/otel/baggage now returns a raw string instead of a percent-encoded value. (#4804)

Fixed

• Fix Parse in go.opentelemetry.io/otel/baggage to validate member value before percent-decoding. (#4755)
• Fix whitespace encoding of Member.String in go.opentelemetry.io/otel/baggage. (#4756)
• Fix baggage item key so that it is not canonicalized in go.opentelemetry.io/otel/bridge/opentracing. (#4776)
• Fix go.opentelemetry.io/otel/bridge/opentracing to properly handle baggage values that requires escaping during propagation. (#4804)
• Fix a bug where using multiple readers resulted in incorrect asynchronous counter values in go.opentelemetry.io/otel/sdk/metric. (#4742)

Release v1.21.0/v0.44.0

Removed

• Remove the deprecated go.opentelemetry.io/otel/bridge/opencensus.NewTracer. (#4706)
• Remove the deprecated go.opentelemetry.io/otel/exporters/otlp/otlpmetric module. (#4707)
• Remove the deprecated go.opentelemetry.io/otel/example/view module. (#4708)
• Remove the deprecated go.opentelemetry.io/otel/example/fib module. (#4723)

Fixed

• Do not parse non-protobuf responses in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#4719)
• Do not parse non-protobuf responses in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (#4719)

Release v1.20.0/v0.43.0

This release brings a breaking change for custom trace API implementations. Some interfaces (TracerProvider, Tracer, Span) now embed the go.opentelemetry.io/otel/trace/embedded types. Implementors need to update their implementations based on what they want the default behavior to be. See the "API Implementations" section of the trace API package documentation for more about how to accomplish this.

Added

• Add go.opentelemetry.io/otel/bridge/opencensus.InstallTraceBridge, which installs the OpenCensus trace bridge, and replaces opencensus.NewTracer. (#4567)
• Add scope version to trace and metric bridges in go.opentelemetry.io/otel/bridge/opencensus. (#4584)
• Add the go.opentelemetry.io/otel/trace/embedded package to be embedded in the exported trace API interfaces. (#4620)
• Add the go.opentelemetry.io/otel/trace/noop package as a default no-op implementation of the trace API. (#4620)
• Add context propagation in go.opentelemetry.io/otel/example/dice. (#4644)
• Add view configuration to go.opentelemetry.io/otel/example/prometheus. (#4649)
• Add go.opentelemetry.io/otel/metric.WithExplicitBucketBoundaries, which allows defining default explicit bucket boundaries when creating histogram instruments. (#4603)
• Add Version function in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc. (#4660)
• Add Version function in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#4660)
• Add Summary, SummaryDataPoint, and QuantileValue to go.opentelemetry.io/sdk/metric/metricdata. (#4622)
• go.opentelemetry.io/otel/bridge/opencensus.NewMetricProducer now supports exemplars from OpenCensus. (#4585)
• Add support for WithExplicitBucketBoundaries in go.opentelemetry.io/otel/sdk/metric. (#4605)
• Add support for Summary metrics in go.opentelemetry.io/otel/bridge/opencensus. (#4668)

Deprecated

• Deprecate go.opentelemetry.io/otel/bridge/opencensus.NewTracer in favor of opencensus.InstallTraceBridge. (#4567)
• Deprecate go.opentelemetry.io/otel/example/fib package is in favor of go.opentelemetry.io/otel/example/dice. (#4618)
• Deprecate go.opentelemetry.io/otel/trace.NewNoopTracerProvider.
  Use the added NewTracerProvider function in go.opentelemetry.io/otel/trace/noop instead. (#4620)
• Deprecate go.opentelemetry.io/otel/example/view package in favor of go.opentelemetry.io/otel/example/prometheus. (#4649)
• Deprecate go.opentelemetry.io/otel/exporters/otlp/otlpmetric. (#4693)

Changed

• go.opentelemetry.io/otel/bridge/opencensus.NewMetricProducer returns a *MetricProducer struct instead of the metric.Producer interface. (#4583)
• The TracerProvider in go.opentelemetry.io/otel/trace now embeds the go.opentelemetry.io/otel/trace/embedded.TracerProvider type.
  This extends the TracerProvider interface and is is a breaking change for any existing implementation.
  Implementors need to update their implementations based on what they want the default behavior of the interface to be.
  See the "API Implementations" section of the go.opentelemetry.io/otel/trace package documentation for more information about how to accomplish this. (#4620)
• The Tracer in go.opentelemetry.io/otel/trace now embeds the go.opentelemetry.io/otel/trace/embedded.Tracer type.
  This extends the Tracer interface and is is a breaking change for any existing implementation.
  Implementors need to update their implementations based on what they want the default behavior of the interface to be.
  See the "API Implementations" section of the go.opentelemetry.io/otel/trace package documentation for more informationabout how to accomplish this. (#4620)
• The Span in go.opentelemetry.io/otel/trace now embeds the go.opentelemetry.io/otel/trace/embedded.Span type.
  This extends the Span interface and is is a breaking change for any existing implementation.
  Implementors need to update their implementations based on what they want the default behavior of the interface to be.
  See the "API Implementations" section of the go.opentelemetry.io/otel/trace package documentation for more information about how to accomplish this. (#4620)
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc does no longer depend on go.opentelemetry.io/otel/exporters/otlp/otlpmetric. (#4660)
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp does no longer depend on go.opentelemetry.io/otel/exporters/otlp/otlpmetric. (#4660)
• Retry for 502 Bad Gateway and 504 Gateway Timeout HTTP statuses in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#4670)
• Retry for 502 Bad Gateway and 504 Gateway Timeout HTTP statuses in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (#4670)
• Retry for RESOURCE_EXHAUSTED only if RetryInfo is returned in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc. (#4669)
• Retry for RESOURCE_EXHAUSTED only if RetryInfo is returned in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc. (#4669)
• Retry temporary HTTP request failures in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#4679)
• Retry temporary HTTP request failures in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (#4679)

Fixed

• Fix improper parsing of characters such us +, / by Parse in go.opentelemetry.io/otel/baggage as they were rendered as a whitespace. (#4667)
• Fix improper parsing of characters such us +, / passed via OTEL_RESOURCE_ATTRIBUTES in go.opentelemetry.io/otel/sdk/resource as they were rendered as a whitespace. (#4699)
• Fix improper parsing of characters such us +, / passed via OTEL_EXPORTER_OTLP_HEADERS and OTEL_EXPORTER_OTLP_METRICS_HEADERS in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc as they were rendered as a whitespace. (#4699)
• Fix improper parsing of characters such us +, / passed via OTEL_EXPORTER_OTLP_HEADERS and OTEL_EXPORTER_OTLP_METRICS_HEADERS in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp as they were rendered as a whitespace. (#4699)
• Fix improper parsing of characters such us +, / passed via OTEL_EXPORTER_OTLP_HEADERS and OTEL_EXPORTER_OTLP_TRACES_HEADERS in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlptracegrpc as they were rendered as a whitespace. (#4699)
• Fix improper parsing of characters such us +, / passed via OTEL_EXPORTER_OTLP_HEADERS and OTEL_EXPORTER_OTLP_TRACES_HEADERS in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlptracehttp as they were rendered as a whitespace. (#4699)
• In go.opentelemetry.op/otel/exporters/prometheus, the exporter no longer Collects metrics after Shutdown is invoked. (#4648)
• Fix documentation for WithCompressor in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc. (#4695)
• Fix documentation for WithCompressor in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc. (#4695)

Release v1.19.0/v0.42.0/v0.0.7

This release contains the first stable release of the OpenTelemetry Go metric SDK. Our project stability guarantees now apply to the go.opentelemetry.io/otel/sdk/metric package. See our versioning policy for more information about these stability guarantees.

Added

• Add the "Roll the dice" getting started application example in go.opentelemetry.io/otel/example/dice. (#4539)
• The WithWriter and WithPrettyPrint options to go.opentelemetry.io/otel/exporters/stdout/stdoutmetric to set a custom io.Writer, and allow displaying the output in human-readable JSON. (#4507)

Changed

• Allow '/' characters in metric instrument names. (#4501)
• The exporter in go.opentelemetry.io/otel/exporters/stdout/stdoutmetric does not prettify its output by default anymore. (#4507)
• Upgrade gopkg.io/yaml from v2 to v3 in go.opentelemetry.io/otel/schema. (#4535)

Fixed

• In go.opentelemetry.op/otel/exporters/prometheus, don't try to create the Prometheus metric on every Collect if we know the scope is invalid. (#4499)

Removed

• Remove "go.opentelemetry.io/otel/bridge/opencensus".NewMetricExporter, which is replaced by NewMetricProducer. (#4566)

Full Changelog: v1.18.0...v1.19.0

Release v1.19.0-rc.1/v0.42.0-rc.1

This is a release candidate for the v1.19.0/v0.42.0 release. That release is expected to include the v1 release of the OpenTelemetry Go metric SDK and will provide stability guarantees of that SDK. See our versioning policy for more information about these stability guarantees.

Changed

• Allow '/' characters in metric instrument names. (#4501)

Fixed

• In go.opentelemetry.op/otel/exporters/prometheus, don't try to create the Prometheus metric on every Collect if we know the scope is invalid. (#4499)

New Contributors

• @aabmass made their first contribution in #4501

Full Changelog: v1.18.0...v1.19.0-rc.1

Release v1.18.0/v0.41.0/v0.0.6

This release drops the compatibility guarantee of Go 1.19.

Added

• Add WithProducer option in go.opentelemetry.op/otel/exporters/prometheus to restore the ability to register producers on the prometheus exporter's manual reader. (#4473)
• Add IgnoreValue option in go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest to allow ignoring values when comparing metrics. (#4447)

Deprecated

• The NewMetricExporter in go.opentelemetry.io/otel/bridge/opencensus was deprecated in v0.35.0 (#3541).
  The deprecation notice format for the function has been corrected to trigger Go documentation and build tooling. (#4470)

Removed

• Removed the deprecated go.opentelemetry.io/otel/exporters/jaeger package. (#4467)
• Removed the deprecated go.opentelemetry.io/otel/example/jaeger package. (#4467)
• Removed the deprecated go.opentelemetry.io/otel/sdk/metric/aggregation package. (#4468)
• Removed the deprecated internal packages in go.opentelemetry.io/otel/exporters/otlp and its sub-packages. (#4469)
• Dropped guaranteed support for versions of Go less than 1.20. (#4481)

New Contributors

• @pkbhowmick made their first contribution in #4462
• @RangelReale made their first contribution in #4447

Full Changelog: v1.17.0...v1.18.0

Release v1.17.0/v0.40.0/v0.5.0

Added

• Export the ManualReader struct in go.opentelemetry.io/otel/sdk/metric. (#4244)
• Export the PeriodicReader struct in go.opentelemetry.io/otel/sdk/metric. (#4244)
• Add support for exponential histogram aggregations.
  A histogram can be configured as an exponential histogram using a view with "go.opentelemetry.io/otel/sdk/metric".ExponentialHistogram as the aggregation. (#4245)
• Export the Exporter struct in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc. (#4272)
• Export the Exporter struct in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#4272)
• The exporters in go.opentelemetry.io/otel/exporters/otlp/otlpmetric now support the OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE environment variable. (#4287)
• Add WithoutCounterSuffixes option in go.opentelemetry.io/otel/exporters/prometheus to disable addition of _total suffixes. (#4306)
• Add info and debug logging to the metric SDK in go.opentelemetry.io/otel/sdk/metric. (#4315)
• The go.opentelemetry.io/otel/semconv/v1.21.0 package.
  The package contains semantic conventions from the v1.21.0 version of the OpenTelemetry Semantic Conventions. (#4362)
• Accept 201 to 299 HTTP status as success in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp and go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (#4365)
• Document the Temporality and Aggregation methods of the "go.opentelemetry.io/otel/sdk/metric".Exporter" need to be concurrent safe. (#4381)
• Expand the set of units supported by the Prometheus exporter, and don't add unit suffixes if they are already present in go.opentelemetry.op/otel/exporters/prometheus (#4374)
• Move the Aggregation interface and its implementations from go.opentelemetry.io/otel/sdk/metric/aggregation to go.opentelemetry.io/otel/sdk/metric. (#4435)
• The exporters in go.opentelemetry.io/otel/exporters/otlp/otlpmetric now support the OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION environment variable. (#4437)
• Add the NewAllowKeysFilter and NewDenyKeysFilter functions to go.opentelemetry.io/otel/attribute to allow convenient creation of allow-keys and deny-keys filters. (#4444)

Changed

• Starting from v1.21.0 of semantic conventions, go.opentelemetry.io/otel/semconv/{version}/httpconv and go.opentelemetry.io/otel/semconv/{version}/netconv packages will no longer be published. (#4145)
• Log duplicate instrument conflict at a warning level instead of info in go.opentelemetry.io/otel/sdk/metric. (#4202)
• Return an error on the creation of new instruments in go.opentelemetry.io/otel/sdk/metric if their name doesn't pass regexp validation. (#4210)
• NewManualReader in go.opentelemetry.io/otel/sdk/metric returns *ManualReader instead of Reader. (#4244)
• NewPeriodicReader in go.opentelemetry.io/otel/sdk/metric returns *PeriodicReader instead of Reader. (#4244)
• Count the Collect time in the PeriodicReader timeout in go.opentelemetry.io/otel/sdk/metric. (#4221)
• The function New in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc returns *Exporter instead of "go.opentelemetry.io/otel/sdk/metric".Exporter. (#4272)
• The function New in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp returns *Exporter instead of "go.opentelemetry.io/otel/sdk/metric".Exporter. (#4272)
• If an attribute set is omitted from an async callback, the previous value will no longer be exported in go.opentelemetry.io/otel/sdk/metric. (#4290)
• If an attribute set is observed multiple times in an async callback in go.opentelemetry.io/otel/sdk/metric, the values will be summed instead of the last observation winning. (#4289)
• Allow the explicit bucket histogram aggregation to be used for the up-down counter, observable counter, observable up-down counter, and observable gauge in the go.opentelemetry.io/otel/sdk/metric package. (#4332)
• Restrict Meters in go.opentelemetry.io/otel/sdk/metric to only register and collect instruments it created. (#4333)
• PeriodicReader.Shutdown and PeriodicReader.ForceFlush in go.opentelemetry.io/otel/sdk/metric now apply the periodic reader's timeout to the operation if the user provided context does not contain a deadline. (#4356, #4377)
• Upgrade all use of go.opentelemetry.io/otel/semconv to use v1.21.0. (#4408)
• Increase instrument name maximum length from 63 to 255 characters in go.opentelemetry.io/otel/sdk/metric. (#4434)
• Add go.opentelemetry.op/otel/sdk/metric.WithProducer as an Option for "go.opentelemetry.io/otel/sdk/metric".NewManualReader and "go.opentelemetry.io/otel/sdk/metric".NewPeriodicReader. (#4346)

Removed

• Remove Reader.RegisterProducer in go.opentelemetry.io/otel/metric.
  Use the added WithProducer option instead. (#4346)
• Remove Reader.ForceFlush in go.opentelemetry.io/otel/metric.
  Notice that PeriodicReader.ForceFlush is still available. (#4375)

Fixed

• Correctly format log messages from the go.opentelemetry.io/otel/exporters/zipkin exporter. (#4143)
• Log an error for calls to NewView in go.opentelemetry.io/otel/sdk/metric that have empty criteria. (#4307)
• Fix "go.opentelemetry.io/otel/sdk/resource".WithHostID() to not set an empty host.id. (#4317)
• Use the instrument identifying fields to cache aggregators and determine duplicate instrument registrations in go.opentelemetry.io/otel/sdk/metric. (#4337)
• Detect duplicate instruments for case-insensitive names in go.opentelemetry.io/otel/sdk/metric. (#4338)
• The ManualReader will not panic if AggregationSelector returns nil in go.opentelemetry.io/otel/sdk/metric. (#4350)
• If a Reader's AggregationSelector returns nil or DefaultAggregation the pipeline will use the default aggregation. (#4350)
• Log a suggested view that fixes instrument conflicts in go.opentelemetry.io/otel/sdk/metric. (#4349)
• Fix possible panic, deadlock and race condition in batch span processor in go.opentelemetry.io/otel/sdk/trace. (#4353)
• Improve context cancellation handling in batch span processor's ForceFlush in go.opentelemetry.io/otel/sdk/trace. (#4369)
• Decouple go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal from go.opentelemetry.io/otel/exporters/otlp/internal using gotmpl. (#4397, #3846)
• Decouple go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal from go.opentelemetry.io/otel/exporters/otlp/internal and go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal using gotmpl. (#4404, #3846)
• Decouple go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/internal from go.opentelemetry.io/otel/exporters/otlp/internal and go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal using gotmpl. (#4407, #3846)
• Decouple go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal from go.opentelemetry.io/otel/exporters/otlp/internal and go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal using gotmpl. (#4400, #3846)
• Decouple go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal from go.opentelemetry.io/otel/exporters/otlp/internal and go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal using gotmpl. (#4401, #3846)
• Do not block the metric SDK when OTLP metric exports are blocked in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc and go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#3925, #4395)
• Do not append _total if the counter already has that suffix for the Prometheus exproter in go.opentelemetry.io/otel/exporter/prometheus. (#4373)
• Fix resource detection data race in go.opentelemetry.io/otel/sdk/resource. (#4409)
• Use the first-seen instrument name during instrument name conflicts in go.opentelemetry.io/otel/sdk/metric. (#4428)

Deprecated

• The go.opentelemetry.io/otel/exporters/jaeger package is deprecated.
  OpenTelemetry dropped support for Jaeger exporter in July 2023.
  Use go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp
  or go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc instead. (#4423)
• The go.opentelemetry.io/otel/example/jaeger package is deprecated. (#4423)
• The go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal package is deprecated. (#4420)
• The go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal/oconf package is deprecated. (#4420)
• The go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal/otest package is deprecated. (#4420)
• The go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal/transform package is deprecated. (#4420)
• The go.opentelemetry.io/otel/exporters/otlp/internal package is deprecated. (#4421)
• The go.opentelemetry.io/otel/exporters/otlp/internal/envconfig package is deprecated. (#4421)
• The go.opentelemetry.io/otel/exporters/otlp/internal/retry package is deprecated. (#4421)
• The go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal package is deprecated. (#4425)
• The go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/envconfig package is deprecated. (#4425)
• The go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig package is deprecated. (#4425)
• The go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlptracetest package is deprecated. (#4425)
• The go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/retry package is deprecated. (#4425)
• The go.opentelemetry.io/otel/sdk/metric/aggregation package is deprecated.
  Use the aggregation types added to go.opentelemetry.io/otel/sdk/metric instead. (#4435)

New Contributors

• @serdarkalayci made their first contribution in #4129
• @Jorropo made their first contributi...

Release v1.16.0/v0.39.0 -- Stable Metric API

This release contains the first stable release of the OpenTelemetry Go metric API. Our project stability guarantees now apply to the go.opentelemetry.io/otel/metric package. See our versioning policy for more information about these stability guarantees.

What's Changed

Added

• The go.opentelemetry.io/otel/semconv/v1.19.0 package. The package contains semantic conventions from the v1.19.0 version of the OpenTelemetry specification. (#3848)
• The go.opentelemetry.io/otel/semconv/v1.20.0 package. The package contains semantic conventions from the v1.20.0 version of the OpenTelemetry specification. (#4078)

Changed

• Use strings.Cut() instead of string.SplitN() for better readability and memory use. (#4049)

Removed

• The deprecated go.opentelemetry.io/otel/metric/instrument package is removed. Use go.opentelemetry.io/otel/metric instead. (#4055)

Fixed

• Fix build for BSD based systems in go.opentelemetry.io/otel/sdk/resource. (#4077)

New Contributors

• @tsloughter made their first contribution in #3848
• @Tijmen34 made their first contribution in #4074
• @ChillOrb made their first contribution in #3677
• @ChenX1993 made their first contribution in #4043
• @andrew-womeldorf made their first contribution in #4086

Full Changelog: v1.15.1...v1.16.0