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Update Baggage in go.opentelemetry.io/otel/propagation and Parse and New in go.opentelemetry.io/otel/baggage to comply with W3C Baggage specification limits.
New and Parse now return partial baggage along with an error when limits are exceeded.
Errors from baggage extraction are reported to the global error handler. (#7880)
Return an error when the endpoint is configured as insecure and with TLS configuration in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp. (#7914)
Return an error when the endpoint is configured as insecure and with TLS configuration in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#7914)
Return an error when the endpoint is configured as insecure and with TLS configuration in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (#7914)
[1.40.0/0.62.0/0.16.0] 2026-02-02
Added
Add AlwaysRecord sampler in go.opentelemetry.io/otel/sdk/trace. (#7724)
Add Enabled method to all synchronous instrument interfaces (Float64Counter, Float64UpDownCounter, Float64Histogram, Float64Gauge, Int64Counter, Int64UpDownCounter, Int64Histogram, Int64Gauge,) in go.opentelemetry.io/otel/metric.
This stabilizes the synchronous instrument enabled feature, allowing users to check if an instrument will process measurements before performing computationally expensive operations. (#7763)
Add go.opentelemetry.io/otel/semconv/v1.39.0 package.
The package contains semantic conventions from the v1.39.0 version of the OpenTelemetry Semantic Conventions.
See the migration documentation for information on how to upgrade from go.opentelemetry.io/otel/semconv/v1.38.0. (#7783, #7789)
Changed
Improve the concurrent performance of HistogramReservoir in go.opentelemetry.io/otel/sdk/metric/exemplar by 4x. (#7443)
Improve the concurrent performance of FixedSizeReservoir in go.opentelemetry.io/otel/sdk/metric/exemplar. (#7447)
Improve performance of concurrent histogram measurements in go.opentelemetry.io/otel/sdk/metric. (#7474)
Improve performance of concurrent synchronous gauge measurements in go.opentelemetry.io/otel/sdk/metric. (#7478)
Add experimental observability metrics in go.opentelemetry.io/otel/exporters/stdout/stdoutmetric. (#7492)
Exporter in go.opentelemetry.io/otel/exporters/prometheus ignores metrics with the scope go.opentelemetry.io/contrib/bridges/prometheus.
This prevents scrape failures when the Prometheus exporter is misconfigured to get data from the Prometheus bridge. (#7688)
Improve performance of concurrent exponential histogram measurements in go.opentelemetry.io/otel/sdk/metric. (#7702)
The rpc.grpc.status_code attribute in the experimental metrics emitted from go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc is replaced with the rpc.response.status_code attribute to align with the semantic conventions. (#7854)
The rpc.grpc.status_code attribute in the experimental metrics emitted from go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc is replaced with the rpc.response.status_code attribute to align with the semantic conventions. (#7854)
Fixed
Fix bad log message when key-value pairs are dropped because of key duplication in go.opentelemetry.io/otel/sdk/log. (#7662)
Fix DroppedAttributes on Record in go.opentelemetry.io/otel/sdk/log to not count the non-attribute key-value pairs dropped because of key duplication. (#7662)
Fix SetAttributes on Record in go.opentelemetry.io/otel/sdk/log to not log that attributes are dropped when they are actually not dropped. (#7662)
Fix missing request.GetBody in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp to correctly handle HTTP/2 GOAWAY frame. (#7794)
WithHostID detector in go.opentelemetry.io/otel/sdk/resource to use full path for ioreg command on Darwin (macOS). (#7818)
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Bumps go.opentelemetry.io/otel from 1.36.0 to 1.41.0.
ChangelogSourced from go.opentelemetry.io/otel's changelog.
[1.41.0/0.63.0/0.17.0/0.0.15] 2026-03-02
This release is the last to support [Go 1.24]. The next release will require at least [Go 1.25].
Added
Fixed
[1.40.0/0.62.0/0.16.0] 2026-02-02
Added
Changed
Fixed
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