1.5.0-rc.1

OpenTelemetry

• The default resource provided by ResourceBuilder.CreateDefault() now adds
  the telemetry.sdk.* attributes defined in the
  specification.
  (#4369)

• Fixed an issue with HashCode computations throwing exceptions on .NET
  Standard 2.1 targets.
  (#4362)

• Update value of the resource attribute telemetry.sdk.version to show the tag
  name which resembles the package version of the SDK.
  (#4375)

• Obsoleted State and StateValues properties and added Body and
  Attributes properties on LogRecord. Note: LogRecord.Attributes and
  LogRecord.StateValues point to the same data. "Attributes" is what the
  OpenTelemetry Specification defines so this was changed for clarity &
  consistency with the specification.
  (#4334)

• Tweaked the behavior of the OpenTelemetryLoggerOptions.ParseStateValues
  flag:

  • LogRecord.Attributes (aka LogRecord.StateValues) are now automatically
    included for all log messages with states implementing IReadOnlyList or
    IEnumerable.

  • OpenTelemetryLoggerOptions.ParseStateValues is now used to tell the SDK to
    parse (using reflection) attributes for custom states which do not implement
    IReadOnlyList or IEnumerable. Only top-level properties are included.

  • LogRecord.State will only be set to the raw state object if no attributes
    are found.

  See #4334
  for details.

• If a template ({OriginalFormat} attribute) cannot be found on log messages a
  formatted message will now automatically be generated (even if
  OpenTelemetryLoggerOptions.IncludeFormattedMessage is set to false).
  (#4334)

OpenTelemetry.Api.ProviderBuilderExtensions

• Fixed a bug which prevented the
  TracerProviderBuilder.AddInstrumentation(IServiceProvider, TracerProvider)
  factory extension from being called during construction of the SDK
  TracerProvider.
  (#4468)

• Added an IServiceCollection.ConfigureOpenTelemetryTracerProvider overload
  which may be used to configure TracerProviderBuilders while the
  IServiceCollection is modifiable (before the IServiceProvider has been
  created).
  (#4508)

OpenTelemetry.Exporter.Console

• Add display of bucket boundaries when using exponential histograms.
  (#4507)

• Added direct reference to System.Text.Encodings.Web with minimum version of
  4.7.2 in response to CVE-2021-26701.

• Updated LogRecord console output: Body is now shown (if set),
  StateValues are now written as Attributes, and State is no longer
  processed.
  (#4334)

OpenTelemetry.Exporter.Jaeger

• Added direct reference to System.Text.Encodings.Web with minimum version of
  4.7.2 in response to CVE-2021-26701.

OpenTelemetry.Exporter.OpenTelemetryProtocol

• Revert version of Google.Protobuf to 3.19.4 (see
  #4201).
  This also reintroduces the System.Reflection.Emit.Lightweight dependency.
  (#4407)

OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs

• The OpenTelemetryLoggerOptions.AddOtlpExporter extension no longer
  automatically sets OpenTelemetryLoggerOptions.ParseStateValues to true.
  The OpenTelemetry SDK now automatically sets Attributes (aka StateValues)
  for the common cases where ParseStateValues was previously required.
  ParseStateValues can be set to true manually by users to enable parsing of
  custom states which do not implement IReadOnlyList / IEnumerable
  interfaces.
  (#4334)

• Updated to use the new LogRecord.Attributes field as LogRecord.StateValues
  is now marked obsolete. There is no impact to transmitted data (StateValues
  and Attributes are equivalent).
  (#4334)

• Fixed issue where the
  observed time
  field of the OTLP log record was not set. It is now correctly set to equal
  the
  time
  field.
  (#4444)

OpenTelemetry.Exporter.Zipkin

• Added direct reference to System.Text.Encodings.Web with minimum version of
  4.7.2 in response to CVE-2021-26701.