[release] Core stable release 1.18.0 updates by otelbot-dotnet[bot] · Pull Request #7674 · open-telemetry/opentelemetry-dotnet

otelbot-dotnet · 2026-08-21T12:33:31Z

Note: This PR was opened automatically by the post-release workflow.

Merge once packages are available on NuGet and the build passes.

Changes

Sets OTelLatestStableVer in Directory.Packages.props to 1.18.0.

codecov · 2026-08-21T12:35:13Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.48%. Comparing base (9db92a4) to head (e35f800).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7674      +/-   ##
==========================================
- Coverage   91.49%   91.48%   -0.01%     
==========================================
  Files         318      318              
  Lines       17867    17867              
==========================================
- Hits        16347    16346       -1     
- Misses       1520     1521       +1

Flag	Coverage Δ
unittests-PowerShellScripts	`87.43% <ø> (ø)`
unittests-Project-Experimental	`91.58% <ø> (+0.04%)`	⬆️
unittests-Project-Stable	`91.56% <ø> (-0.05%)`	⬇️
unittests-Solution	`91.51% <ø> (-0.06%)`	⬇️
unittests-UnstableCoreLibraries-Experimental	`51.17% <ø> (ø)`

Flags with carried forward coverage won't be shown. Click here to find out more.
see 1 file with indirect coverage changes

opentelemetry-pr-dashboard · 2026-08-21T13:21:21Z

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Merged · refreshed 2026-08-21 14:16 UTC

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….0 (#1316) Updated [OpenTelemetry.Exporter.OpenTelemetryProtocol](https://github.com/open-telemetry/opentelemetry-dotnet) from 1.17.0 to 1.18.0. <details> <summary>Release notes</summary> _Sourced from [OpenTelemetry.Exporter.OpenTelemetryProtocol's releases](https://github.com/open-telemetry/opentelemetry-dotnet/releases)._ ## 1.18.0 For highlights and announcements pertaining to this release see: [Release Notes > 1.18.0](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/RELEASENOTES.md#1180). The following changes are from the previous release [1.17.0](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.17.0). * NuGet: [OpenTelemetry v1.18.0](https://www.nuget.org/packages/OpenTelemetry/1.18.0) * Fixed self-diagnostics log lines being silently dropped when an event message or parameter contained enough 3-byte UTF-8 characters to overflow the internal buffer estimate. Such content is now truncated. ([#7543](open-telemetry/opentelemetry-dotnet#7543)) * Fixed activity creation throwing when multiple tracer providers return a sampler attribute with the same key. ([#7558](open-telemetry/opentelemetry-dotnet#7558)) * Added the `otel.sdk.processor.log.processed` SDK self-observability metric. ([#7486](open-telemetry/opentelemetry-dotnet#7486)) * Added the `otel.sdk.processor.span.processed` SDK self-observability metric. ([#7598](open-telemetry/opentelemetry-dotnet#7598)) * `BatchActivityExportProcessor` and `SimpleActivityExportProcessor` no longer forward spans to the exporter once `Shutdown` has been called, and `BatchActivityExportProcessor.Shutdown` now waits for in-flight `OnEnd` calls to finish enqueueing before flushing. ([#7598](open-telemetry/opentelemetry-dotnet#7598)) * Fix logger, meter and tracer providers leaking background threads if an exception is thrown by their constructor after resource creation. ([#7615](open-telemetry/opentelemetry-dotnet#7615)) * `CircularBufferBuckets.Copy` optimized to use bulk array copies. ([#7670](open-telemetry/opentelemetry-dotnet#7670)) * Restored configured `MaxScale` after delta exponential histogram collection. ([#7671](open-telemetry/opentelemetry-dotnet#7671)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.18.0/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.18.0](https://www.nuget.org/packages/OpenTelemetry.Api/1.18.0) * Avoid formatting exceptions and creating exception attributes when `RecordException` is called on a span that is not recorded. ([#7669](open-telemetry/opentelemetry-dotnet#7669)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.18.0/src/OpenTelemetry.Api/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api.ProviderBuilderExtensions v1.18.0](https://www.nuget.org/packages/OpenTelemetry.Api.ProviderBuilderExtensions/1.18.0) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.18.0/src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Console v1.18.0](https://www.nuget.org/packages/OpenTelemetry.Exporter.Console/1.18.0) * Added support for serializing attribute values that are key/value lists (`IEnumerable<KeyValuePair<string, object?>>`). These attributes will be serialized as JSON objects. ([#7015](open-telemetry/opentelemetry-dotnet#7015)) ... (truncated) ## 1.18.0-rc.1 The following changes are from the previous release [1.17.0](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.17.0). * NuGet: [OpenTelemetry v1.18.0-rc.1](https://www.nuget.org/packages/OpenTelemetry/1.18.0-rc.1) * Fixed self-diagnostics log lines being silently dropped when an event message or parameter contained enough 3-byte UTF-8 characters to overflow the internal buffer estimate. Such content is now truncated. ([#7543](open-telemetry/opentelemetry-dotnet#7543)) * Fixed activity creation throwing when multiple tracer providers return a sampler attribute with the same key. ([#7558](open-telemetry/opentelemetry-dotnet#7558)) * Added the `otel.sdk.processor.log.processed` SDK self-observability metric. ([#7486](open-telemetry/opentelemetry-dotnet#7486)) * Added the `otel.sdk.processor.span.processed` SDK self-observability metric. ([#7598](open-telemetry/opentelemetry-dotnet#7598)) * `BatchActivityExportProcessor` and `SimpleActivityExportProcessor` no longer forward spans to the exporter once `Shutdown` has been called, and `BatchActivityExportProcessor.Shutdown` now waits for in-flight `OnEnd` calls to finish enqueueing before flushing. ([#7598](open-telemetry/opentelemetry-dotnet#7598)) * Fix logger, meter and tracer providers leaking background threads if an exception is thrown by their constructor after resource creation. ([#7615](open-telemetry/opentelemetry-dotnet#7615)) * `CircularBufferBuckets.Copy` optimized to use bulk array copies. ([#7670](open-telemetry/opentelemetry-dotnet#7670)) * Restored configured `MaxScale` after delta exponential histogram collection. ([#7671](open-telemetry/opentelemetry-dotnet#7671)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.18.0-rc.1/src/OpenTelemetry/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api v1.18.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Api/1.18.0-rc.1) * Avoid formatting exceptions and creating exception attributes when `RecordException` is called on a span that is not recorded. ([#7669](open-telemetry/opentelemetry-dotnet#7669)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.18.0-rc.1/src/OpenTelemetry.Api/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Api.ProviderBuilderExtensions v1.18.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Api.ProviderBuilderExtensions/1.18.0-rc.1) No notable changes. See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.18.0-rc.1/src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Console v1.18.0-rc.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Console/1.18.0-rc.1) * Added support for serializing attribute values that are key/value lists (`IEnumerable<KeyValuePair<string, object?>>`). These attributes will be serialized as JSON objects. ([#7015](open-telemetry/opentelemetry-dotnet#7015)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/core-1.18.0-rc.1/src/OpenTelemetry.Exporter.Console/CHANGELOG.md) for details. ... (truncated) ## 1.18.0-beta.1 The following changes are from the previous release [1.17.0-beta.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/coreunstable-1.17.0-beta.1). * NuGet: [OpenTelemetry.Exporter.Prometheus.AspNetCore v1.18.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.AspNetCore/1.18.0-beta.1) * Fix concurrent scrapes returning an empty response under contention. Now the exporter will return an HTTP 500 error instead. ([#7571](open-telemetry/opentelemetry-dotnet#7571)) * Waiting for concurrent scrapes to finish before collecting no longer blocks, which could stall concurrent scrapes being waited on. ([#7571](open-telemetry/opentelemetry-dotnet#7571)) * Fixed the interaction between `PrometheusAspNetCoreOptions.TranslationStrategy` and content negotiation. The configured strategy is now applied before content negotiation, instead of the negotiated escaping scheme replacing the strategy's, and the `Content-Type` header now reports the escaping scheme that was applied rather than the one that was negotiated. ([#7610](open-telemetry/opentelemetry-dotnet#7610)) * Fixed metric values and histogram bucket bounds being written with 17 significant digits instead of their shortest round-trippable representation. ([#7589](open-telemetry/opentelemetry-dotnet#7589)) * Fixed the canonical representation used for histogram `le` and summary `quantile` label values falling back to 17 significant digits incorrectly. ([#7589](open-telemetry/opentelemetry-dotnet#7589)) * Fixed a race where a slow scrape could return an HTTP 200 instead of 408. ([#7615](open-telemetry/opentelemetry-dotnet#7615)) * Updated OpenTelemetry core component version(s) to `1.18.0`. ([#7674](open-telemetry/opentelemetry-dotnet#7674)) See [CHANGELOG](https://github.com/open-telemetry/opentelemetry-dotnet/blob/coreunstable-1.18.0-beta.1/src/OpenTelemetry.Exporter.Prometheus.AspNetCore/CHANGELOG.md) for details. * NuGet: [OpenTelemetry.Exporter.Prometheus.HttpListener v1.18.0-beta.1](https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.HttpListener/1.18.0-beta.1) * Fix concurrent scrapes returning an empty response under contention. Now the exporter will return an HTTP 500 error instead. ([#7571](open-telemetry/opentelemetry-dotnet#7571)) * Waiting for concurrent scrapes to finish before collecting no longer blocks, which could stall concurrent scrapes being waited on. ([#7571](open-telemetry/opentelemetry-dotnet#7571)) * A scrape which is still collecting when the listener is disposed now returns an HTTP 503 response. ([#7587](open-telemetry/opentelemetry-dotnet#7587)) * Shutting down the listener no longer waits indefinitely for its request processing loop to stop, and no longer throws if the loop faulted. ([#7587](open-telemetry/opentelemetry-dotnet#7587)) * Fixed the interaction between `PrometheusHttpListenerOptions.TranslationStrategy` and content negotiation. The configured strategy is now applied before content negotiation, instead of the negotiated escaping scheme replacing the strategy's, and the `Content-Type` header now reports the escaping scheme that was applied rather than the one that was negotiated. ([#7610](open-telemetry/opentelemetry-dotnet#7610)) * Fixed metric values and histogram bucket bounds being written with 17 significant digits instead of their shortest round-trippable representation. ([#7589](open-telemetry/opentelemetry-dotnet#7589)) * Fixed the canonical representation used for histogram `le` and summary `quantile` label values falling back to 17 significant digits incorrectly. ([#7589](open-telemetry/opentelemetry-dotnet#7589)) ... (truncated) Commits viewable in [compare view](open-telemetry/opentelemetry-dotnet@core-1.17.0...core-1.18.0). </details> [![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=OpenTelemetry.Exporter.OpenTelemetryProtocol&package-manager=nuget&previous-version=1.17.0&new-version=1.18.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) 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 this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) </details> Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Update OTelLatestStableVer in Directory.Packages.props to 1.18.0.

ec8a8f4

otelbot-dotnet Bot added the release Related to the release process label Aug 21, 2026

otelbot-dotnet Bot requested a review from a team as a code owner August 21, 2026 12:33

Update CHANGELOGs for projects using OTelLatestStableVer.

e35f800

martincostello approved these changes Aug 21, 2026

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martincostello enabled auto-merge August 21, 2026 12:39

martincostello added this pull request to the merge queue Aug 21, 2026

opentelemetry-pr-dashboard Bot mentioned this pull request Aug 21, 2026

Pull Request Dashboard #7539

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Merged via the queue into main with commit 9e18796 Aug 21, 2026
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martincostello deleted the otelbot/post-stable-core-1.18.0-update branch August 21, 2026 13:24

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[release] Core stable release 1.18.0 updates - #7674

[release] Core stable release 1.18.0 updates#7674
martincostello merged 2 commits into
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