[API] Handle null tracestate values by martincostello · Pull Request #7433 · open-telemetry/opentelemetry-dotnet

martincostello · 2026-06-20T09:01:24Z

Fixes #7432.

Changes

Handle tracestate values that are returned as null from the getter in TraceContextPropagator.

Merge requirement checklist

CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
Unit tests added/updated
Appropriate CHANGELOG.md files updated for non-trivial changes
~~Changes in public API reviewed (if applicable)~~

Handle `tracestate` values that are returned as null in `TraceContextPropagator`.

Add PR to previous entry for similar issue.

codecov · 2026-06-20T09:15:26Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.18%. Comparing base (88fd1f0) to head (8b55a3e).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7433      +/-   ##
==========================================
+ Coverage   89.98%   90.18%   +0.19%     
==========================================
  Files         277      279       +2     
  Lines       14624    15308     +684     
==========================================
+ Hits        13159    13805     +646     
- Misses       1465     1503      +38

Flag	Coverage Δ
unittests-Project-Experimental	`89.85% <100.00%> (-0.05%)`	⬇️
unittests-Project-Stable	`89.90% <100.00%> (-0.02%)`	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
....Api/Context/Propagation/TraceContextPropagator.cs	`91.30% <100.00%> (+0.31%)`	⬆️

... and 7 files with indirect coverage changes

Fix order after merge.

Fix ordering again.

Copilot

Pull request overview

Fixes a robustness bug in the API-layer TraceContextPropagator so trace context extraction tolerates tracestate values that may come through as null from carrier getters (preventing internal NullReferenceExceptions like those reported in #7432).

Changes:

Updated TryExtractSingleTracestate to treat null/empty tracestate as a valid “no tracestate” case.
Added a regression test to ensure extraction succeeds when the getter yields a null tracestate value.
Updated the OpenTelemetry.Api changelog entry to reference the additional PR.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
`src/OpenTelemetry.Api/Context/Propagation/TraceContextPropagator.cs`	Adds null/empty handling when extracting a single `tracestate` value to avoid NREs.
`test/OpenTelemetry.Tests/Trace/Propagation/TraceContextPropagatorTests.cs`	Adds coverage for `Extract` when the carrier getter returns a `null` `tracestate` value.
`src/OpenTelemetry.Api/CHANGELOG.md`	Documents the fix in the API package changelog.

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

Also handle null when there are multiple `tracestate` values.

Update signature to raise a warning if null wasn't checked for.

[//]: # (dependabot-start) ⚠️ **Dependabot is rebasing this PR** ⚠️ Rebasing might not happen immediately, so don't worry if this takes some time. Note: if you make any changes to this PR yourself, they will take precedence over the rebase. --- [//]: # (dependabot-end) Updated [OpenTelemetry.Exporter.OpenTelemetryProtocol](https://github.com/open-telemetry/opentelemetry-dotnet) from 1.16.0 to 1.17.0. <details> <summary>Release notes</summary> _Sourced from [OpenTelemetry.Exporter.OpenTelemetryProtocol's releases](https://github.com/open-telemetry/opentelemetry-dotnet/releases)._ ## 1.17.0 For highlights and announcements pertaining to this release see: [Release Notes > 1.17.0](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/RELEASENOTES.md#1170). The following changes are from the previous release [1.17.0-rc.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.17.0-rc.1). * NuGet: [OpenTelemetry v1.17.0](https://www.nuget.org/packages/OpenTelemetry/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Api/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Api/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api.ProviderBuilderExtensions v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Api.ProviderBuilderExtensions/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Console v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Console/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.Console/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.InMemory v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.InMemory/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.OpenTelemetryProtocol v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.OpenTelemetryProtocol/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Zipkin v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Zipkin/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Extensions.Hosting v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Extensions.Hosting/1.17.0) No notable changes. ... (truncated) ## 1.17.0-rc.1 The following changes are from the previous release [1.16.0](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.16.0). * NuGet: [OpenTelemetry v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry/1.17.0-rc.1) * Fixed a metric point reclaim data race on CPU ARM architectures. ([#7401](open-telemetry/opentelemetry-dotnet#7401)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * Replaced the vendored copy of `EnvironmentVariablesConfigurationProvider` with a direct `Microsoft.Extensions.Configuration.EnvironmentVariables` package dependency. Consumers gain automatic pickup of upstream bug fixes and security patches; no public API or behavioural change. ([#7146](open-telemetry/opentelemetry-dotnet#7146)) * Added a verbose `OpenTelemetry-Sdk` self-diagnostics event that is emitted when an activity is dropped because its local (in-process) parent is not recorded. ([#7427](open-telemetry/opentelemetry-dotnet#7427)) * Added support for a Schema URL on `Resource` instances. ([#7472](open-telemetry/opentelemetry-dotnet#7472)) * Fixed a metric storage leak that occurred when meters and instruments were repeatedly created and disposed. ([#7466](open-telemetry/opentelemetry-dotnet#7466)) * Added `ExcludedTagKeys` property to `MetricStreamConfiguration` to support excluding specific tag keys from metric streams. ([#7373](open-telemetry/opentelemetry-dotnet#7373)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0-rc.1/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Api/1.17.0-rc.1) * Fixed `TraceContextPropagator` to normalize empty `tracestate` header values to `null` when extracting trace context. ([#7407](open-telemetry/opentelemetry-dotnet#7407), [#7433](open-telemetry/opentelemetry-dotnet#7433)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * **Experimental (pre-release builds only):** Updated `EnvironmentVariableCarrier.Get` to read only the normalized environment variable name, following the updated [environment variable carrier specification](open-telemetry/opentelemetry-specification#5144). Non-normalized carrier keys are no longer matched, even when they would normalize to the requested key. ... (truncated) ## 1.17.0-beta.1 The following changes are from the previous release [1.16.0-beta.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/coreunstable-1.16.0-beta.1). * NuGet: [OpenTelemetry.Exporter.Prometheus.AspNetCore v1.17.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.AspNetCore/1.17.0-beta.1) * Added a verbose-level diagnostic event for ignored metrics. ([#7429](open-telemetry/opentelemetry-dotnet#7429)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * Fix double unit suffixes in metric names when using OpenMetrics. ([#7454](open-telemetry/opentelemetry-dotnet#7454)) * Fix incorrect handling of leading digits in metric names for OpenMetrics. ([#7454](open-telemetry/opentelemetry-dotnet#7454)) * Add `PrometheusAspNetCoreOptions.ScopeInfoEnabled` property to enable or disable scope labels in Prometheus metrics. Defaults to `true`. ([#7436](open-telemetry/opentelemetry-dotnet#7436)) * Added support for the `dots` and `values` Prometheus UTF-8 name escaping schemes when negotiated via the `Accept` header. ([#7439](open-telemetry/opentelemetry-dotnet#7439)) * Add `PrometheusAspNetCoreOptions.TargetInfoEnabled` property to enable or disable the `target_info` metric in Prometheus metrics. Defaults to `true`. ([#7438](open-telemetry/opentelemetry-dotnet#7438)) * Added support for the `allow-utf-8` Prometheus UTF-8 name escaping scheme when negotiated via the `Accept` header. ([#7440](open-telemetry/opentelemetry-dotnet#7440)) * Add `PrometheusAspNetCoreOptions.ResourceConstantLabels` property to select resource attributes to add to each metric as constant labels. Defaults to `null` (no resource attributes are added as metric labels). ([#7471](open-telemetry/opentelemetry-dotnet#7471)) * Add `PrometheusAspNetCoreOptions.MaxScrapeResponseSizeBytes` to configure the maximum size of a scrape response. The default is now ~166 MiB. ([#7487](open-telemetry/opentelemetry-dotnet#7487)) * A scrape whose serialized output exceeds the maximum scrape response size limit now responds with HTTP 500. ([#7487](open-telemetry/opentelemetry-dotnet#7487)) * Fixed the Prometheus text exposition format emitting redundant comments. ([#7491](open-telemetry/opentelemetry-dotnet#7491)) * Made `Accept` header content negotiation consistent with the `PrometheusHttpListener` endpoint. ... (truncated) Commits viewable in [compare view](open-telemetry/opentelemetry-dotnet@core-1.16.0...core-1.17.0). </details> Updated [OpenTelemetry.Extensions.Hosting](https://github.com/open-telemetry/opentelemetry-dotnet) from 1.16.0 to 1.17.0. <details> <summary>Release notes</summary> _Sourced from [OpenTelemetry.Extensions.Hosting's releases](https://github.com/open-telemetry/opentelemetry-dotnet/releases)._ ## 1.17.0 For highlights and announcements pertaining to this release see: [Release Notes > 1.17.0](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/RELEASENOTES.md#1170). The following changes are from the previous release [1.17.0-rc.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.17.0-rc.1). * NuGet: [OpenTelemetry v1.17.0](https://www.nuget.org/packages/OpenTelemetry/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Api/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Api/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api.ProviderBuilderExtensions v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Api.ProviderBuilderExtensions/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Console v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Console/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.Console/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.InMemory v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.InMemory/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.OpenTelemetryProtocol v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.OpenTelemetryProtocol/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Zipkin v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Zipkin/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Extensions.Hosting v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Extensions.Hosting/1.17.0) No notable changes. ... (truncated) ## 1.17.0-rc.1 The following changes are from the previous release [1.16.0](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.16.0). * NuGet: [OpenTelemetry v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry/1.17.0-rc.1) * Fixed a metric point reclaim data race on CPU ARM architectures. ([#7401](open-telemetry/opentelemetry-dotnet#7401)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * Replaced the vendored copy of `EnvironmentVariablesConfigurationProvider` with a direct `Microsoft.Extensions.Configuration.EnvironmentVariables` package dependency. Consumers gain automatic pickup of upstream bug fixes and security patches; no public API or behavioural change. ([#7146](open-telemetry/opentelemetry-dotnet#7146)) * Added a verbose `OpenTelemetry-Sdk` self-diagnostics event that is emitted when an activity is dropped because its local (in-process) parent is not recorded. ([#7427](open-telemetry/opentelemetry-dotnet#7427)) * Added support for a Schema URL on `Resource` instances. ([#7472](open-telemetry/opentelemetry-dotnet#7472)) * Fixed a metric storage leak that occurred when meters and instruments were repeatedly created and disposed. ([#7466](open-telemetry/opentelemetry-dotnet#7466)) * Added `ExcludedTagKeys` property to `MetricStreamConfiguration` to support excluding specific tag keys from metric streams. ([#7373](open-telemetry/opentelemetry-dotnet#7373)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0-rc.1/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Api/1.17.0-rc.1) * Fixed `TraceContextPropagator` to normalize empty `tracestate` header values to `null` when extracting trace context. ([#7407](open-telemetry/opentelemetry-dotnet#7407), [#7433](open-telemetry/opentelemetry-dotnet#7433)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * **Experimental (pre-release builds only):** Updated `EnvironmentVariableCarrier.Get` to read only the normalized environment variable name, following the updated [environment variable carrier specification](open-telemetry/opentelemetry-specification#5144). Non-normalized carrier keys are no longer matched, even when they would normalize to the requested key. ... (truncated) ## 1.17.0-beta.1 The following changes are from the previous release [1.16.0-beta.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/coreunstable-1.16.0-beta.1). * NuGet: [OpenTelemetry.Exporter.Prometheus.AspNetCore v1.17.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.AspNetCore/1.17.0-beta.1) * Added a verbose-level diagnostic event for ignored metrics. ([#7429](open-telemetry/opentelemetry-dotnet#7429)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * Fix double unit suffixes in metric names when using OpenMetrics. ([#7454](open-telemetry/opentelemetry-dotnet#7454)) * Fix incorrect handling of leading digits in metric names for OpenMetrics. ([#7454](open-telemetry/opentelemetry-dotnet#7454)) * Add `PrometheusAspNetCoreOptions.ScopeInfoEnabled` property to enable or disable scope labels in Prometheus metrics. Defaults to `true`. ([#7436](open-telemetry/opentelemetry-dotnet#7436)) * Added support for the `dots` and `values` Prometheus UTF-8 name escaping schemes when negotiated via the `Accept` header. ([#7439](open-telemetry/opentelemetry-dotnet#7439)) * Add `PrometheusAspNetCoreOptions.TargetInfoEnabled` property to enable or disable the `target_info` metric in Prometheus metrics. Defaults to `true`. ([#7438](open-telemetry/opentelemetry-dotnet#7438)) * Added support for the `allow-utf-8` Prometheus UTF-8 name escaping scheme when negotiated via the `Accept` header. ([#7440](open-telemetry/opentelemetry-dotnet#7440)) * Add `PrometheusAspNetCoreOptions.ResourceConstantLabels` property to select resource attributes to add to each metric as constant labels. Defaults to `null` (no resource attributes are added as metric labels). ([#7471](open-telemetry/opentelemetry-dotnet#7471)) * Add `PrometheusAspNetCoreOptions.MaxScrapeResponseSizeBytes` to configure the maximum size of a scrape response. The default is now ~166 MiB. ([#7487](open-telemetry/opentelemetry-dotnet#7487)) * A scrape whose serialized output exceeds the maximum scrape response size limit now responds with HTTP 500. ([#7487](open-telemetry/opentelemetry-dotnet#7487)) * Fixed the Prometheus text exposition format emitting redundant comments. ([#7491](open-telemetry/opentelemetry-dotnet#7491)) * Made `Accept` header content negotiation consistent with the `PrometheusHttpListener` endpoint. ... (truncated) Commits viewable in [compare view](open-telemetry/opentelemetry-dotnet@core-1.16.0...core-1.17.0). </details> Updated [OpenTelemetry.Instrumentation.AspNetCore](https://github.com/open-telemetry/opentelemetry-dotnet-contrib) from 1.16.0 to 1.17.0. <details> <summary>Release notes</summary> _Sourced from [OpenTelemetry.Instrumentation.AspNetCore's releases](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/releases)._ ## 1.17.0 * NuGet: [OpenTelemetry.Exporter.Geneva v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Geneva/1.17.0) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) * Updated ETW manifest and payload in `EtwDataTransport` with synthetic payload so that the runtime-generated .NET ETW manifest matches the actual payload. ([#4729](open-telemetry/opentelemetry-dotnet-contrib#4729) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Exporter.Geneva-1.17.0/src/OpenTelemetry.Exporter.Geneva/CHANGELOG.md) for details. ## 1.17.0-rc.1 * NuGet: [OpenTelemetry.Instrumentation.Process v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Instrumentation.Process/1.17.0-rc.1) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Instrumentation.Process-1.17.0-rc.1/src/OpenTelemetry.Instrumentation.Process/CHANGELOG.md) for details. ## 1.17.0-beta.1 * NuGet: [OpenTelemetry.Extensions.Enrichment v1.17.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Extensions.Enrichment/1.17.0-beta.1) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Extensions.Enrichment-1.17.0-beta.1/src/OpenTelemetry.Extensions.Enrichment/CHANGELOG.md) for details. ## 1.17.0-alpha.1 * NuGet: [OpenTelemetry.Instrumentation.EventCounters v1.17.0-alpha.1](https://www.nuget.org/packages/OpenTelemetry.Instrumentation.EventCounters/1.17.0-alpha.1) * Assemblies are now digitally signed using cosign. ([#4637](open-telemetry/opentelemetry-dotnet-contrib#4637)) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Instrumentation.EventCounters-1.17.0-alpha.1/src/OpenTelemetry.Instrumentation.EventCounters/CHANGELOG.md) for details. Commits viewable in [compare view](open-telemetry/opentelemetry-dotnet-contrib@Instrumentation.AWS-1.16.0...Exporter.Geneva-1.17.0). </details> Updated [OpenTelemetry.Instrumentation.Http](https://github.com/open-telemetry/opentelemetry-dotnet-contrib) from 1.16.0 to 1.17.0. <details> <summary>Release notes</summary> _Sourced from [OpenTelemetry.Instrumentation.Http's releases](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/releases)._ ## 1.17.0 * NuGet: [OpenTelemetry.Exporter.Geneva v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Geneva/1.17.0) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) * Updated ETW manifest and payload in `EtwDataTransport` with synthetic payload so that the runtime-generated .NET ETW manifest matches the actual payload. ([#4729](open-telemetry/opentelemetry-dotnet-contrib#4729) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Exporter.Geneva-1.17.0/src/OpenTelemetry.Exporter.Geneva/CHANGELOG.md) for details. ## 1.17.0-rc.1 * NuGet: [OpenTelemetry.Instrumentation.Process v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Instrumentation.Process/1.17.0-rc.1) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Instrumentation.Process-1.17.0-rc.1/src/OpenTelemetry.Instrumentation.Process/CHANGELOG.md) for details. ## 1.17.0-beta.1 * NuGet: [OpenTelemetry.Extensions.Enrichment v1.17.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Extensions.Enrichment/1.17.0-beta.1) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Extensions.Enrichment-1.17.0-beta.1/src/OpenTelemetry.Extensions.Enrichment/CHANGELOG.md) for details. ## 1.17.0-alpha.1 * NuGet: [OpenTelemetry.Instrumentation.EventCounters v1.17.0-alpha.1](https://www.nuget.org/packages/OpenTelemetry.Instrumentation.EventCounters/1.17.0-alpha.1) * Assemblies are now digitally signed using cosign. ([#4637](open-telemetry/opentelemetry-dotnet-contrib#4637)) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Instrumentation.EventCounters-1.17.0-alpha.1/src/OpenTelemetry.Instrumentation.EventCounters/CHANGELOG.md) for details. Commits viewable in [compare view](open-telemetry/opentelemetry-dotnet-contrib@Instrumentation.AWS-1.16.0...Exporter.Geneva-1.17.0). </details> Updated [OpenTelemetry.Instrumentation.Runtime](https://github.com/open-telemetry/opentelemetry-dotnet-contrib) from 1.16.0 to 1.17.0. <details> <summary>Release notes</summary> _Sourced from [OpenTelemetry.Instrumentation.Runtime's releases](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/releases)._ ## 1.17.0 * NuGet: [OpenTelemetry.Exporter.Geneva v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Geneva/1.17.0) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) * Updated ETW manifest and payload in `EtwDataTransport` with synthetic payload so that the runtime-generated .NET ETW manifest matches the actual payload. ([#4729](open-telemetry/opentelemetry-dotnet-contrib#4729) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Exporter.Geneva-1.17.0/src/OpenTelemetry.Exporter.Geneva/CHANGELOG.md) for details. ## 1.17.0-rc.1 * NuGet: [OpenTelemetry.Instrumentation.Process v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Instrumentation.Process/1.17.0-rc.1) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Instrumentation.Process-1.17.0-rc.1/src/OpenTelemetry.Instrumentation.Process/CHANGELOG.md) for details. ## 1.17.0-beta.1 * NuGet: [OpenTelemetry.Extensions.Enrichment v1.17.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Extensions.Enrichment/1.17.0-beta.1) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Extensions.Enrichment-1.17.0-beta.1/src/OpenTelemetry.Extensions.Enrichment/CHANGELOG.md) for details. ## 1.17.0-alpha.1 * NuGet: [OpenTelemetry.Instrumentation.EventCounters v1.17.0-alpha.1](https://www.nuget.org/packages/OpenTelemetry.Instrumentation.EventCounters/1.17.0-alpha.1) * Assemblies are now digitally signed using cosign. ([#4637](open-telemetry/opentelemetry-dotnet-contrib#4637)) * Updated OpenTelemetry core component version(s) to `1.17.0`. ([#4773](open-telemetry/opentelemetry-dotnet-contrib#4773)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/blob/Instrumentation.EventCounters-1.17.0-alpha.1/src/OpenTelemetry.Instrumentation.EventCounters/CHANGELOG.md) for details. Commits viewable in [compare view](open-telemetry/opentelemetry-dotnet-contrib@Instrumentation.AWS-1.16.0...Exporter.Geneva-1.17.0). </details> Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore <dependency name> major version` will close this group update PR and stop Dependabot creating any more for the specific dependency's major version (unless you unignore this specific dependency's major version or upgrade to it yourself) - `@dependabot ignore <dependency name> minor version` will close this group update PR and stop Dependabot creating any more for the specific dependency's minor version (unless you unignore this specific dependency's minor version or upgrade to it yourself) - `@dependabot ignore <dependency name>` will close this group update PR and stop Dependabot creating any more for the specific dependency (unless you unignore this specific dependency or upgrade to it yourself) - `@dependabot unignore <dependency name>` will remove all of the ignore conditions of the specified dependency - `@dependabot unignore <dependency name> <ignore condition>` will remove the ignore condition of the specified dependency and ignore conditions </details>

…xtensions.Hosting (#117) Pinned [OpenTelemetry.Exporter.OpenTelemetryProtocol](https://github.com/open-telemetry/opentelemetry-dotnet) at 1.17.0. <details> <summary>Release notes</summary> _Sourced from [OpenTelemetry.Exporter.OpenTelemetryProtocol's releases](https://github.com/open-telemetry/opentelemetry-dotnet/releases)._ ## 1.17.0 For highlights and announcements pertaining to this release see: [Release Notes > 1.17.0](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/RELEASENOTES.md#1170). The following changes are from the previous release [1.17.0-rc.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.17.0-rc.1). * NuGet: [OpenTelemetry v1.17.0](https://www.nuget.org/packages/OpenTelemetry/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Api/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Api/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api.ProviderBuilderExtensions v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Api.ProviderBuilderExtensions/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Console v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Console/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.Console/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.InMemory v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.InMemory/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.OpenTelemetryProtocol v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.OpenTelemetryProtocol/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Zipkin v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Zipkin/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Extensions.Hosting v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Extensions.Hosting/1.17.0) No notable changes. ... (truncated) ## 1.17.0-rc.1 The following changes are from the previous release [1.16.0](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.16.0). * NuGet: [OpenTelemetry v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry/1.17.0-rc.1) * Fixed a metric point reclaim data race on CPU ARM architectures. ([#7401](open-telemetry/opentelemetry-dotnet#7401)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * Replaced the vendored copy of `EnvironmentVariablesConfigurationProvider` with a direct `Microsoft.Extensions.Configuration.EnvironmentVariables` package dependency. Consumers gain automatic pickup of upstream bug fixes and security patches; no public API or behavioural change. ([#7146](open-telemetry/opentelemetry-dotnet#7146)) * Added a verbose `OpenTelemetry-Sdk` self-diagnostics event that is emitted when an activity is dropped because its local (in-process) parent is not recorded. ([#7427](open-telemetry/opentelemetry-dotnet#7427)) * Added support for a Schema URL on `Resource` instances. ([#7472](open-telemetry/opentelemetry-dotnet#7472)) * Fixed a metric storage leak that occurred when meters and instruments were repeatedly created and disposed. ([#7466](open-telemetry/opentelemetry-dotnet#7466)) * Added `ExcludedTagKeys` property to `MetricStreamConfiguration` to support excluding specific tag keys from metric streams. ([#7373](open-telemetry/opentelemetry-dotnet#7373)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0-rc.1/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Api/1.17.0-rc.1) * Fixed `TraceContextPropagator` to normalize empty `tracestate` header values to `null` when extracting trace context. ([#7407](open-telemetry/opentelemetry-dotnet#7407), [#7433](open-telemetry/opentelemetry-dotnet#7433)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * **Experimental (pre-release builds only):** Updated `EnvironmentVariableCarrier.Get` to read only the normalized environment variable name, following the updated [environment variable carrier specification](open-telemetry/opentelemetry-specification#5144). Non-normalized carrier keys are no longer matched, even when they would normalize to the requested key. ... (truncated) ## 1.17.0-beta.1 The following changes are from the previous release [1.16.0-beta.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/coreunstable-1.16.0-beta.1). * NuGet: [OpenTelemetry.Exporter.Prometheus.AspNetCore v1.17.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.AspNetCore/1.17.0-beta.1) * Added a verbose-level diagnostic event for ignored metrics. ([#7429](open-telemetry/opentelemetry-dotnet#7429)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * Fix double unit suffixes in metric names when using OpenMetrics. ([#7454](open-telemetry/opentelemetry-dotnet#7454)) * Fix incorrect handling of leading digits in metric names for OpenMetrics. ([#7454](open-telemetry/opentelemetry-dotnet#7454)) * Add `PrometheusAspNetCoreOptions.ScopeInfoEnabled` property to enable or disable scope labels in Prometheus metrics. Defaults to `true`. ([#7436](open-telemetry/opentelemetry-dotnet#7436)) * Added support for the `dots` and `values` Prometheus UTF-8 name escaping schemes when negotiated via the `Accept` header. ([#7439](open-telemetry/opentelemetry-dotnet#7439)) * Add `PrometheusAspNetCoreOptions.TargetInfoEnabled` property to enable or disable the `target_info` metric in Prometheus metrics. Defaults to `true`. ([#7438](open-telemetry/opentelemetry-dotnet#7438)) * Added support for the `allow-utf-8` Prometheus UTF-8 name escaping scheme when negotiated via the `Accept` header. ([#7440](open-telemetry/opentelemetry-dotnet#7440)) * Add `PrometheusAspNetCoreOptions.ResourceConstantLabels` property to select resource attributes to add to each metric as constant labels. Defaults to `null` (no resource attributes are added as metric labels). ([#7471](open-telemetry/opentelemetry-dotnet#7471)) * Add `PrometheusAspNetCoreOptions.MaxScrapeResponseSizeBytes` to configure the maximum size of a scrape response. The default is now ~166 MiB. ([#7487](open-telemetry/opentelemetry-dotnet#7487)) * A scrape whose serialized output exceeds the maximum scrape response size limit now responds with HTTP 500. ([#7487](open-telemetry/opentelemetry-dotnet#7487)) * Fixed the Prometheus text exposition format emitting redundant comments. ([#7491](open-telemetry/opentelemetry-dotnet#7491)) * Made `Accept` header content negotiation consistent with the `PrometheusHttpListener` endpoint. ... (truncated) ## 1.16.0 For highlights and announcements pertaining to this release see: [Release Notes > 1.16.0](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/RELEASENOTES.md#1160). The following changes are from the previous release [1.16.0-rc.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.16.0-rc.1). * NuGet: [OpenTelemetry v1.16.0](https://www.nuget.org/packages/OpenTelemetry/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Api/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Api/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api.ProviderBuilderExtensions v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Api.ProviderBuilderExtensions/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Console v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Console/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Exporter.Console/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.InMemory v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.InMemory/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.OpenTelemetryProtocol v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.OpenTelemetryProtocol/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Zipkin v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Zipkin/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Extensions.Hosting v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Extensions.Hosting/1.16.0) No notable changes. ... (truncated) ## 1.16.0-rc.1 The following changes are from the previous release [1.15.3](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.15.3). * NuGet: [OpenTelemetry v1.16.0-rc.1](https://www.nuget.org/packages/OpenTelemetry/1.16.0-rc.1) * Stop validating View-provided metric stream `Name` against the instrument name syntax, per [spec clarification](open-telemetry/opentelemetry-specification#5094). ([#7300](open-telemetry/opentelemetry-dotnet#7300)) * Fix incorrect validation of `OTEL_BSP_*` and `OTEL_BLRP_*` environment variables. ([#7187](open-telemetry/opentelemetry-dotnet#7187)) * Fix observable instrument callbacks running once per reader instead of once per collection cycle. ([#7188](open-telemetry/opentelemetry-dotnet#7188)) * Added exception safety for user-supplied `ExemplarReservoir` implementations. Exceptions thrown from `Offer` are now caught and logged rather than propagating out of `Counter.Add`/`Histogram.Record`. ([#7277](open-telemetry/opentelemetry-dotnet#7277)) * Update `OpenTelemetrySdkEventSource` to support the W3C randomness flag. ([#7301](open-telemetry/opentelemetry-dotnet#7301)) * Added `ObservedTimestamp` property to `LogRecord`. ([#6979](open-telemetry/opentelemetry-dotnet#6979)) * **Breaking Change** Explicit histogram boundaries no longer allow more than 10 million values. ([#7165](open-telemetry/opentelemetry-dotnet#7165)) * Fixed a circular reference which could cause a `LoggerProvider` to fail to resolve when one of its dependencies depends on `ILogger` or `ILoggerFactory`. As part of this fix the `LoggerProvider` resolved from dependency injection is now created lazily when the first logger is created rather than when `ILoggerProvider` or `ILoggerFactory` is resolved. A consequence is that any invalid configuration now surfaces when the first log record is written instead of when the logging services are resolved. ([#7308](open-telemetry/opentelemetry-dotnet#7308)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0-rc.1/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.16.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Api/1.16.0-rc.1) * **Experimental (pre-release builds only):** Add support for using environment variables as context propagation carriers. ([#7174](open-telemetry/opentelemetry-dotnet#7174)) * Fix `BaggagePropagator` to correctly follow Key and Value Encoding rules as per ... (truncated) ## 1.16.0-beta.1 The following changes are from the previous release [1.15.3-beta.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/coreunstable-1.15.3-beta.1). * NuGet: [OpenTelemetry.Exporter.Prometheus.AspNetCore v1.16.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.AspNetCore/1.16.0-beta.1) * Fixed scrape response cache freshness using monotonic time so it is not affected by NTP system clock adjustments. ([#7253](open-telemetry/opentelemetry-dotnet#7253)) * **Breaking Change** Removed `DisableTimestamp` property from `PrometheusAspNetCoreOptions`. ([#7176](open-telemetry/opentelemetry-dotnet#7176)) * Fixed the serialization of `NaN`, `PositiveInfinity`, and `NegativeInfinity` values in Prometheus metrics to be compliant with the specification. ([#7179](open-telemetry/opentelemetry-dotnet#7179)) * Fixed loss of precision when serializing `double` and `float` values in Prometheus metrics to be compliant with the specification by using 17 significant digits to represent such values. ([#7179](open-telemetry/opentelemetry-dotnet#7179)) * Fix non-ASCII characters in metric names and unit strings not being sanitized correctly during Prometheus serialization. ([#7184](open-telemetry/opentelemetry-dotnet#7184)) * Fix case where reader tracking could be reset while readers were still active. ([#7190](open-telemetry/opentelemetry-dotnet#7190)) * Improve `Accept` header handling for format negotiation so OpenMetrics is selected correctly by considering whitespace and `q` weights. ([#7208](open-telemetry/opentelemetry-dotnet#7208)) * Emit OpenMetrics exemplars for counters and histogram buckets. ([#7222](open-telemetry/opentelemetry-dotnet#7222)) * Fix incorrect handling of untyped metrics when using OpenMetrics format. ([#7219](open-telemetry/opentelemetry-dotnet#7219)) * Fix Prometheus/OpenMetrics serialization to emit metric and label names containing `_` instead of dropping them and prefixing leading digits. Invalid characters are replaced with `_` instead of being dropped. ([#7209](open-telemetry/opentelemetry-dotnet#7209)) * Add `escaping=underscores` to the `Accept` header handling for content negotiation so OpenMetrics are handled correctly. ([#7209](open-telemetry/opentelemetry-dotnet#7209)) * Omit histogram `_sum` and `_count` in OpenMetrics when negative bucket thresholds are present. ([#7221](open-telemetry/opentelemetry-dotnet#7221)) ... (truncated) Commits viewable in [compare view](open-telemetry/opentelemetry-dotnet@core-1.15.3...core-1.17.0). </details> Pinned [OpenTelemetry.Extensions.Hosting](https://github.com/open-telemetry/opentelemetry-dotnet) at 1.17.0. <details> <summary>Release notes</summary> _Sourced from [OpenTelemetry.Extensions.Hosting's releases](https://github.com/open-telemetry/opentelemetry-dotnet/releases)._ ## 1.17.0 For highlights and announcements pertaining to this release see: [Release Notes > 1.17.0](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/RELEASENOTES.md#1170). The following changes are from the previous release [1.17.0-rc.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.17.0-rc.1). * NuGet: [OpenTelemetry v1.17.0](https://www.nuget.org/packages/OpenTelemetry/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Api/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Api/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api.ProviderBuilderExtensions v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Api.ProviderBuilderExtensions/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Console v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Console/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.Console/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.InMemory v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.InMemory/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.OpenTelemetryProtocol v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.OpenTelemetryProtocol/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Zipkin v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Zipkin/1.17.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Extensions.Hosting v1.17.0](https://www.nuget.org/packages/OpenTelemetry.Extensions.Hosting/1.17.0) No notable changes. ... (truncated) ## 1.17.0-rc.1 The following changes are from the previous release [1.16.0](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.16.0). * NuGet: [OpenTelemetry v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry/1.17.0-rc.1) * Fixed a metric point reclaim data race on CPU ARM architectures. ([#7401](open-telemetry/opentelemetry-dotnet#7401)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * Replaced the vendored copy of `EnvironmentVariablesConfigurationProvider` with a direct `Microsoft.Extensions.Configuration.EnvironmentVariables` package dependency. Consumers gain automatic pickup of upstream bug fixes and security patches; no public API or behavioural change. ([#7146](open-telemetry/opentelemetry-dotnet#7146)) * Added a verbose `OpenTelemetry-Sdk` self-diagnostics event that is emitted when an activity is dropped because its local (in-process) parent is not recorded. ([#7427](open-telemetry/opentelemetry-dotnet#7427)) * Added support for a Schema URL on `Resource` instances. ([#7472](open-telemetry/opentelemetry-dotnet#7472)) * Fixed a metric storage leak that occurred when meters and instruments were repeatedly created and disposed. ([#7466](open-telemetry/opentelemetry-dotnet#7466)) * Added `ExcludedTagKeys` property to `MetricStreamConfiguration` to support excluding specific tag keys from metric streams. ([#7373](open-telemetry/opentelemetry-dotnet#7373)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.17.0-rc.1/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.17.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Api/1.17.0-rc.1) * Fixed `TraceContextPropagator` to normalize empty `tracestate` header values to `null` when extracting trace context. ([#7407](open-telemetry/opentelemetry-dotnet#7407), [#7433](open-telemetry/opentelemetry-dotnet#7433)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * **Experimental (pre-release builds only):** Updated `EnvironmentVariableCarrier.Get` to read only the normalized environment variable name, following the updated [environment variable carrier specification](open-telemetry/opentelemetry-specification#5144). Non-normalized carrier keys are no longer matched, even when they would normalize to the requested key. ... (truncated) ## 1.17.0-beta.1 The following changes are from the previous release [1.16.0-beta.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/coreunstable-1.16.0-beta.1). * NuGet: [OpenTelemetry.Exporter.Prometheus.AspNetCore v1.17.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.AspNetCore/1.17.0-beta.1) * Added a verbose-level diagnostic event for ignored metrics. ([#7429](open-telemetry/opentelemetry-dotnet#7429)) * The library is now marked as trim and AOT compatible. ([#7441](open-telemetry/opentelemetry-dotnet#7441)) * Fix double unit suffixes in metric names when using OpenMetrics. ([#7454](open-telemetry/opentelemetry-dotnet#7454)) * Fix incorrect handling of leading digits in metric names for OpenMetrics. ([#7454](open-telemetry/opentelemetry-dotnet#7454)) * Add `PrometheusAspNetCoreOptions.ScopeInfoEnabled` property to enable or disable scope labels in Prometheus metrics. Defaults to `true`. ([#7436](open-telemetry/opentelemetry-dotnet#7436)) * Added support for the `dots` and `values` Prometheus UTF-8 name escaping schemes when negotiated via the `Accept` header. ([#7439](open-telemetry/opentelemetry-dotnet#7439)) * Add `PrometheusAspNetCoreOptions.TargetInfoEnabled` property to enable or disable the `target_info` metric in Prometheus metrics. Defaults to `true`. ([#7438](open-telemetry/opentelemetry-dotnet#7438)) * Added support for the `allow-utf-8` Prometheus UTF-8 name escaping scheme when negotiated via the `Accept` header. ([#7440](open-telemetry/opentelemetry-dotnet#7440)) * Add `PrometheusAspNetCoreOptions.ResourceConstantLabels` property to select resource attributes to add to each metric as constant labels. Defaults to `null` (no resource attributes are added as metric labels). ([#7471](open-telemetry/opentelemetry-dotnet#7471)) * Add `PrometheusAspNetCoreOptions.MaxScrapeResponseSizeBytes` to configure the maximum size of a scrape response. The default is now ~166 MiB. ([#7487](open-telemetry/opentelemetry-dotnet#7487)) * A scrape whose serialized output exceeds the maximum scrape response size limit now responds with HTTP 500. ([#7487](open-telemetry/opentelemetry-dotnet#7487)) * Fixed the Prometheus text exposition format emitting redundant comments. ([#7491](open-telemetry/opentelemetry-dotnet#7491)) * Made `Accept` header content negotiation consistent with the `PrometheusHttpListener` endpoint. ... (truncated) ## 1.16.0 For highlights and announcements pertaining to this release see: [Release Notes > 1.16.0](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/RELEASENOTES.md#1160). The following changes are from the previous release [1.16.0-rc.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.16.0-rc.1). * NuGet: [OpenTelemetry v1.16.0](https://www.nuget.org/packages/OpenTelemetry/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Api/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Api/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api.ProviderBuilderExtensions v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Api.ProviderBuilderExtensions/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Console v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Console/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Exporter.Console/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.InMemory v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.InMemory/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.OpenTelemetryProtocol v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.OpenTelemetryProtocol/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Zipkin v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Zipkin/1.16.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Extensions.Hosting v1.16.0](https://www.nuget.org/packages/OpenTelemetry.Extensions.Hosting/1.16.0) No notable changes. ... (truncated) ## 1.16.0-rc.1 The following changes are from the previous release [1.15.3](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.15.3). * NuGet: [OpenTelemetry v1.16.0-rc.1](https://www.nuget.org/packages/OpenTelemetry/1.16.0-rc.1) * Stop validating View-provided metric stream `Name` against the instrument name syntax, per [spec clarification](open-telemetry/opentelemetry-specification#5094). ([#7300](open-telemetry/opentelemetry-dotnet#7300)) * Fix incorrect validation of `OTEL_BSP_*` and `OTEL_BLRP_*` environment variables. ([#7187](open-telemetry/opentelemetry-dotnet#7187)) * Fix observable instrument callbacks running once per reader instead of once per collection cycle. ([#7188](open-telemetry/opentelemetry-dotnet#7188)) * Added exception safety for user-supplied `ExemplarReservoir` implementations. Exceptions thrown from `Offer` are now caught and logged rather than propagating out of `Counter.Add`/`Histogram.Record`. ([#7277](open-telemetry/opentelemetry-dotnet#7277)) * Update `OpenTelemetrySdkEventSource` to support the W3C randomness flag. ([#7301](open-telemetry/opentelemetry-dotnet#7301)) * Added `ObservedTimestamp` property to `LogRecord`. ([#6979](open-telemetry/opentelemetry-dotnet#6979)) * **Breaking Change** Explicit histogram boundaries no longer allow more than 10 million values. ([#7165](open-telemetry/opentelemetry-dotnet#7165)) * Fixed a circular reference which could cause a `LoggerProvider` to fail to resolve when one of its dependencies depends on `ILogger` or `ILoggerFactory`. As part of this fix the `LoggerProvider` resolved from dependency injection is now created lazily when the first logger is created rather than when `ILoggerProvider` or `ILoggerFactory` is resolved. A consequence is that any invalid configuration now surfaces when the first log record is written instead of when the logging services are resolved. ([#7308](open-telemetry/opentelemetry-dotnet#7308)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.16.0-rc.1/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.16.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Api/1.16.0-rc.1) * **Experimental (pre-release builds only):** Add support for using environment variables as context propagation carriers. ([#7174](open-telemetry/opentelemetry-dotnet#7174)) * Fix `BaggagePropagator` to correctly follow Key and Value Encoding rules as per ... (truncated) ## 1.16.0-beta.1 The following changes are from the previous release [1.15.3-beta.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/coreunstable-1.15.3-beta.1). * NuGet: [OpenTelemetry.Exporter.Prometheus.AspNetCore v1.16.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.AspNetCore/1.16.0-beta.1) * Fixed scrape response cache freshness using monotonic time so it is not affected by NTP system clock adjustments. ([#7253](open-telemetry/opentelemetry-dotnet#7253)) * **Breaking Change** Removed `DisableTimestamp` property from `PrometheusAspNetCoreOptions`. ([#7176](open-telemetry/opentelemetry-dotnet#7176)) * Fixed the serialization of `NaN`, `PositiveInfinity`, and `NegativeInfinity` values in Prometheus metrics to be compliant with the specification. ([#7179](open-telemetry/opentelemetry-dotnet#7179)) * Fixed loss of precision when serializing `double` and `float` values in Prometheus metrics to be compliant with the specification by using 17 significant digits to represent such values. ([#7179](open-telemetry/opentelemetry-dotnet#7179)) * Fix non-ASCII characters in metric names and unit strings not being sanitized correctly during Prometheus serialization. ([#7184](open-telemetry/opentelemetry-dotnet#7184)) * Fix case where reader tracking could be reset while readers were still active. ([#7190](open-telemetry/opentelemetry-dotnet#7190)) * Improve `Accept` header handling for format negotiation so OpenMetrics is selected correctly by considering whitespace and `q` weights. ([#7208](open-telemetry/opentelemetry-dotnet#7208)) * Emit OpenMetrics exemplars for counters and histogram buckets. ([#7222](open-telemetry/opentelemetry-dotnet#7222)) * Fix incorrect handling of untyped metrics when using OpenMetrics format. ([#7219](open-telemetry/opentelemetry-dotnet#7219)) * Fix Prometheus/OpenMetrics serialization to emit metric and label names containing `_` instead of dropping them and prefixing leading digits. Invalid characters are replaced with `_` instead of being dropped. ([#7209](open-telemetry/opentelemetry-dotnet#7209)) * Add `escaping=underscores` to the `Accept` header handling for content negotiation so OpenMetrics are handled correctly. ([#7209](open-telemetry/opentelemetry-dotnet#7209)) * Omit histogram `_sum` and `_count` in OpenMetrics when negative bucket thresholds are present. ([#7221](open-telemetry/opentelemetry-dotnet#7221)) ... (truncated) Commits viewable in [compare view](open-telemetry/opentelemetry-dotnet@core-1.15.3...core-1.17.0). </details> Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore <dependency name> major version` will close this group update PR and stop Dependabot creating any more for the specific dependency's major version (unless you unignore this specific dependency's major version or upgrade to it yourself) - `@dependabot ignore <dependency name> minor version` will close this group update PR and stop Dependabot creating any more for the specific dependency's minor version (unless you unignore this specific dependency's minor version or upgrade to it yourself) - `@dependabot ignore <dependency name>` will close this group update PR and stop Dependabot creating any more for the specific dependency (unless you unignore this specific dependency or upgrade to it yourself) - `@dependabot unignore <dependency name>` will remove all of the ignore conditions of the specified dependency - `@dependabot unignore <dependency name> <ignore condition>` will remove the ignore condition of the specified dependency and ignore conditions </details>

[API] Handle null tracestate values

a3a5536

Handle `tracestate` values that are returned as null in `TraceContextPropagator`.

github-actions Bot added pkg:OpenTelemetry.Api Issues related to OpenTelemetry.Api NuGet package pkg:OpenTelemetry Issues related to OpenTelemetry NuGet package labels Jun 20, 2026

[API] Update CHANGELOG

5d2a312

Add PR to previous entry for similar issue.

martincostello mentioned this pull request Jun 23, 2026

[bug] NullReferenceExceptions from TraceContextPropagator #7432

Closed

martincostello marked this pull request as ready for review June 23, 2026 07:27

martincostello requested a review from a team as a code owner June 23, 2026 07:27

Copilot AI review requested due to automatic review settings June 23, 2026 07:27

Merge branch 'main' into open-telemetrygh-7432

c570dae

Copilot started reviewing on behalf of martincostello June 23, 2026 07:28 View session

martincostello added 2 commits June 23, 2026 08:28

[API] Update CHANGELOG

117e7a7

Fix order after merge.

[API] Update CHANGELOG

d45a39d

Fix ordering again.

martincostello enabled auto-merge June 23, 2026 07:30

Copilot AI reviewed Jun 23, 2026

View reviewed changes

[API] Address feedback

9afbd2b

Also handle null when there are multiple `tracestate` values.

martincostello mentioned this pull request Jun 23, 2026

[API] Refactor slicing code #7446

Merged

4 tasks

Kielek reviewed Jun 23, 2026

View reviewed changes

Comment thread src/OpenTelemetry.Api/Context/Propagation/TraceContextPropagator.cs Outdated

martincostello disabled auto-merge June 23, 2026 08:26

[API] Update signature

8b55a3e

Update signature to raise a warning if null wasn't checked for.

martincostello enabled auto-merge June 23, 2026 08:28

Kielek approved these changes Jun 23, 2026

View reviewed changes

martincostello added this pull request to the merge queue Jun 23, 2026

Merged via the queue into open-telemetry:main with commit d0524cb Jun 23, 2026
74 checks passed

martincostello deleted the gh-7432 branch June 23, 2026 09:02

martincostello added this to the v1.17.0 milestone Jul 3, 2026

This was referenced Jul 16, 2026

Bump the nuget group with 3 updates mishamyte/OpenTelemetry-Demo#510

Closed

Bump the nuget-minor group with 17 updates kamkie/stackverse#474

Merged

Bump the opentelemetry group with 3 updates futugyou/DDDExample#349

Merged

dependabot Bot mentioned this pull request Jul 21, 2026

Bump OpenTelemetry.Exporter.OpenTelemetryProtocol and OpenTelemetry.Extensions.Hosting machie27/OpenMedSphere#117

Merged

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

[API] Handle null tracestate values#7433

[API] Handle null tracestate values#7433
martincostello merged 7 commits into
open-telemetry:mainfrom
martincostello:gh-7432

martincostello commented Jun 20, 2026 •

edited

Loading

Uh oh!

codecov Bot commented Jun 20, 2026 •

edited

Loading

Uh oh!

Copilot AI left a comment

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

Uh oh!

Conversation

martincostello commented Jun 20, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Changes

Merge requirement checklist

Uh oh!

codecov Bot commented Jun 20, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Codecov Report

Uh oh!

Copilot AI left a comment

Choose a reason for hiding this comment

Pull request overview

Reviewed changes

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

martincostello commented Jun 20, 2026 •

edited

Loading

codecov Bot commented Jun 20, 2026 •

edited

Loading