core-1.10.0-rc.1

The following changes are from the previous release 1.10.0-beta.1.

• NuGet: OpenTelemetry v1.10.0-rc.1

  • The experimental APIs previously covered by OTEL1003
    (MetricStreamConfiguration.CardinalityLimit) are now part of the public API
    and supported in stable builds.
    (#5926)

  • Promoted overflow attribute from experimental to stable and removed the
    OTEL_DOTNET_EXPERIMENTAL_METRICS_EMIT_OVERFLOW_ATTRIBUTE environment variable.

    Previous Behavior:
    By default, when the cardinality limit was reached, measurements were dropped,
    and an internal log was emitted the first time this occurred. Users could
    opt-in to experimental overflow attribute feature with
    OTEL_DOTNET_EXPERIMENTAL_METRICS_EMIT_OVERFLOW_ATTRIBUTE=true.
    With this setting, the SDK would use an overflow attribute
    (otel.metric.overflow = true) to aggregate measurements instead of dropping
    measurements. No internal log was emitted in this case.

    New Behavior:
    The SDK now always uses the overflow attribute (otel.metric.overflow = true)
    to aggregate measurements when the cardinality limit is reached. The previous
    approach of dropping measurements has been removed. No internal logs are
    emitted when the limit is hit.

    The default cardinality limit remains 2000 per metric. To set the cardinality
    limit for an individual metric, use the changing cardinality limit for a
    Metric.

    There is NO ability to revert to old behavior.
    (#5909)

  • Exposed a public constructor on Batch<T> which accepts a single instance
    of T to be contained in the batch.
    (#5642)

  See CHANGELOG for details.

• NuGet: OpenTelemetry.Api v1.10.0-rc.1

  No notable changes.

  See CHANGELOG for details.

• NuGet: OpenTelemetry.Api.ProviderBuilderExtensions v1.10.0-rc.1

  No notable changes.

  See CHANGELOG for details.

• NuGet: OpenTelemetry.Exporter.Console v1.10.0-rc.1

  • Added direct reference to System.Text.Json for the net8.0 target with
    minimum version of 8.0.5 in response to
    CVE-2024-30105 &
    CVE-2024-43485.
    (#5874,
    #5891)

  • Added support for Instrumentation Scope Attributes (i.e
    ActivitySource.Tags)
    when writing traces to the console.
    (#5935)

  See CHANGELOG for details.

• NuGet: OpenTelemetry.Exporter.InMemory v1.10.0-rc.1

  No notable changes.

  See CHANGELOG for details.

• NuGet: OpenTelemetry.Exporter.OpenTelemetryProtocol v1.10.0-rc.1

  • Added support for exporting instrumentation scope attributes from
    ActivitySource.Tags.
    (#5897)

  See CHANGELOG for details.

• NuGet: OpenTelemetry.Exporter.Zipkin v1.10.0-rc.1

  • Added direct reference to System.Text.Json for the net8.0 target with
    minimum version of 8.0.5 in response to
    CVE-2024-30105 &
    CVE-2024-43485.
    (#5874,
    #5891)

  See CHANGELOG for details.

• NuGet: OpenTelemetry.Extensions.Hosting v1.10.0-rc.1

  No notable changes.

  See CHANGELOG for details.

• NuGet: OpenTelemetry.Extensions.Propagators v1.10.0-rc.1

  No notable changes.

  See CHANGELOG for details.