Releases v1.28.0/v0.50.0/v0.4.0

[MrAlias]

Added

• The IsEmpty method is added to the Instrument type in go.opentelemetry.io/otel/sdk/metric.
  This method is used to check if an Instrument instance is a zero-value. (Export the Instrument IsEmpty method #5431)
• Store and provide the emitted context.Context in ScopeRecords of go.opentelemetry.io/otel/sdk/log/logtest. (log/logtest: provide record with their context #5468)
• The go.opentelemetry.io/otel/semconv/v1.26.0 package.
  The package contains semantic conventions from the v1.26.0 version of the OpenTelemetry Semantic Conventions. (Add semconv/v1.26.0, removes deprecated semconvs #5476)
• The AssertRecordEqual method to go.opentelemetry.io/otel/log/logtest to allow comparison of two log records in tests. (Introduce logtest.AssertRecordEqual #5499)
• The WithHeaders option to go.opentelemetry.io/otel/exporters/zipkin to allow configuring custom http headers while exporting spans. (Add WithHeaders option for Zipkin exporter #5530)

Changed

• Tracer.Start in go.opentelemetry.io/otel/trace/noop no longer allocates a span for empty span context. (trace: Span in noop.Start is no longer allocated #5457)
• Upgrade go.opentelemetry.io/otel/semconv/v1.25.0 to go.opentelemetry.io/otel/semconv/v1.26.0 in go.opentelemetry.io/otel/example/otel-collector. (Upgrade semconv use to v1.26.0 #5490)
• Upgrade go.opentelemetry.io/otel/semconv/v1.25.0 to go.opentelemetry.io/otel/semconv/v1.26.0 in go.opentelemetry.io/otel/example/zipkin. (Upgrade semconv use to v1.26.0 #5490)
• Upgrade go.opentelemetry.io/otel/semconv/v1.25.0 to go.opentelemetry.io/otel/semconv/v1.26.0 in go.opentelemetry.io/otel/exporters/zipkin. (Upgrade semconv use to v1.26.0 #5490)
  • The exporter no longer exports the deprecated "otel.library.name" or "otel.library.version" attributes.
• Upgrade go.opentelemetry.io/otel/semconv/v1.25.0 to go.opentelemetry.io/otel/semconv/v1.26.0 in go.opentelemetry.io/otel/sdk/resource. (Upgrade semconv use to v1.26.0 #5490)
• Upgrade go.opentelemetry.io/otel/semconv/v1.25.0 to go.opentelemetry.io/otel/semconv/v1.26.0 in go.opentelemetry.io/otel/sdk/trace. (Upgrade semconv use to v1.26.0 #5490)
• SimpleProcessor.OnEmit in go.opentelemetry.io/otel/sdk/log no longer allocates a slice which makes it possible to have a zero-allocation log processing using SimpleProcessor. (sdk/log: Remove slice allocation from SimpleProcessor.OnEmit #5493)
• Use non-generic functions in the Start method of "go.opentelemetry.io/otel/sdk/trace".Trace to reduce memory allocation. (trace: Use non-generic to replace newEvictedQueue in trace.start to reduce memory usage. #5497)
• service.instance.id is populated for a Resource created with "go.opentelemetry.io/otel/sdk/resource".Default with a default value when OTEL_GO_X_RESOURCE is set. (Populate service.instance.id with a default value when OTEL_GO_X_RESOURCE is set #5520)
• Improve performance of metric instruments in go.opentelemetry.io/otel/sdk/metric by removing unnecessary calls to time.Now. (Move time.Now call into exemplar reservoir to improve performance #5545)

Fixed

• Log a warning to the OpenTelemetry internal logger when a Record in go.opentelemetry.io/otel/sdk/log drops an attribute due to a limit being reached. (Log a warning when log Record attribute is dropped #5376)
• Identify the Tracer returned from the global TracerProvider in go.opentelemetry.io/otel/global with its schema URL. (Identify global Tracers and Meters with their schema URLs #5426)
• Identify the Meter returned from the global MeterProvider in go.opentelemetry.io/otel/global with its schema URL. (Identify global Tracers and Meters with their schema URLs #5426)
• Log a warning to the OpenTelemetry internal logger when a Span in go.opentelemetry.io/otel/sdk/trace drops an attribute, event, or link due to a limit being reached. (Log warning when a trace attribute/event/link is discarded due to limits #5434)
• Document instrument name requirements in go.opentelemetry.io/otel/metric. (Document instrument name requirements #5435)
• Prevent random number generation data-race for experimental rand exemplars in go.opentelemetry.io/otel/sdk/metric. (Guard rng in exemplar rand computation #5456)
• Fix counting number of dropped attributes of Record in go.opentelemetry.io/otel/sdk/log. (sdk/log: Fix counting number of dropped attributes of log Record #5464)
• Fix panic in baggage creation when a member contains 0x80 char in key or value. (fix(baggage): validate chars panic with 0x80 #5494)
• Correct comments for the priority of the WithEndpoint and WithEndpointURL options and their corresponding environment variables in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc. (Correct the comment for the priority of options and environments on otlptracegrpc #5508)
• Retry trace and span ID generation if it generated an invalid one in go.opentelemetry.io/otel/sdk/trace. (Fix IDGenerator may generate zero TraceId / SpanId  #5514)
• Fix stale timestamps reported by the last-value aggregation. (Fix timestamp handling for the lastvalue aggregation #5517)
• Indicate the Exporter in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp must be created by the New method. (Indicate the otlploghttp exporter must be created by the New method #5521)
• Improved performance in all {Bool,Int64,Float64,String}SliceValue functions of go.opentelemetry.io/attributes by reducing the number of allocations. (Reduces allocation in attributes #5549)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.4%. Comparing base (8279a1a) to head (e2d6001).

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #5569     +/-   ##
=======================================
- Coverage   84.4%   84.4%   -0.1%     
=======================================
  Files        271     271             
  Lines      22333   22333             
=======================================
- Hits       18868   18867      -1     
- Misses      3134    3135      +1     
  Partials     331     331             

see 1 file with indirect coverage changes