Bump go.opentelemetry.io/otel/sdk from 1.39.0 to 1.40.0

[dependabot]

Bumps go.opentelemetry.io/otel/sdk from 1.39.0 to 1.40.0.

Changelog

Sourced from go.opentelemetry.io/otel/sdk's changelog.

[1.40.0/0.62.0/0.16.0] 2026-02-02

Added

• Add AlwaysRecord sampler in go.opentelemetry.io/otel/sdk/trace. (#7724)
• Add Enabled method to all synchronous instrument interfaces (Float64Counter, Float64UpDownCounter, Float64Histogram, Float64Gauge, Int64Counter, Int64UpDownCounter, Int64Histogram, Int64Gauge,) in go.opentelemetry.io/otel/metric. This stabilizes the synchronous instrument enabled feature, allowing users to check if an instrument will process measurements before performing computationally expensive operations. (#7763)
• Add go.opentelemetry.io/otel/semconv/v1.39.0 package. The package contains semantic conventions from the v1.39.0 version of the OpenTelemetry Semantic Conventions. See the migration documentation for information on how to upgrade from go.opentelemetry.io/otel/semconv/v1.38.0. (#7783, #7789)

Changed

• Improve the concurrent performance of HistogramReservoir in go.opentelemetry.io/otel/sdk/metric/exemplar by 4x. (#7443)
• Improve the concurrent performance of FixedSizeReservoir in go.opentelemetry.io/otel/sdk/metric/exemplar. (#7447)
• Improve performance of concurrent histogram measurements in go.opentelemetry.io/otel/sdk/metric. (#7474)
• Improve performance of concurrent synchronous gauge measurements in go.opentelemetry.io/otel/sdk/metric. (#7478)
• Add experimental observability metrics in go.opentelemetry.io/otel/exporters/stdout/stdoutmetric. (#7492)
• Exporter in go.opentelemetry.io/otel/exporters/prometheus ignores metrics with the scope go.opentelemetry.io/contrib/bridges/prometheus. This prevents scrape failures when the Prometheus exporter is misconfigured to get data from the Prometheus bridge. (#7688)
• Improve performance of concurrent exponential histogram measurements in go.opentelemetry.io/otel/sdk/metric. (#7702)
• The rpc.grpc.status_code attribute in the experimental metrics emitted from go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc is replaced with the rpc.response.status_code attribute to align with the semantic conventions. (#7854)
• The rpc.grpc.status_code attribute in the experimental metrics emitted from go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc is replaced with the rpc.response.status_code attribute to align with the semantic conventions. (#7854)

Fixed

• Fix bad log message when key-value pairs are dropped because of key duplication in go.opentelemetry.io/otel/sdk/log. (#7662)
• Fix DroppedAttributes on Record in go.opentelemetry.io/otel/sdk/log to not count the non-attribute key-value pairs dropped because of key duplication. (#7662)
• Fix SetAttributes on Record in go.opentelemetry.io/otel/sdk/log to not log that attributes are dropped when they are actually not dropped. (#7662)
• Fix missing request.GetBody in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp to correctly handle HTTP/2 GOAWAY frame. (#7794)
• WithHostID detector in go.opentelemetry.io/otel/sdk/resource to use full path for ioreg command on Darwin (macOS). (#7818)

Deprecated

• Deprecate go.opentelemetry.io/otel/exporters/zipkin. For more information, see the OTel blog post deprecating the Zipkin exporter. (#7670)

Commits

• a3a5317 Release v1.40.0 (#7859)
• 77785da chore(deps): update github/codeql-action action to v4.32.1 (#7858)
• 56fa1c2 chore(deps): update module github.com/clipperhouse/uax29/v2 to v2.5.0 (#7857)
• 298cbed Upgrade semconv use to v1.39.0 (#7854)
• 3264bf1 refactor: modernize code (#7850)
• fd5d030 chore(deps): update module github.com/grpc-ecosystem/grpc-gateway/v2 to v2.27...
• 8d3b4cb chore(deps): update actions/cache action to v5.0.3 (#7847)
• 91f7cad chore(deps): update github.com/timakin/bodyclose digest to 73d1f95 (#7845)
• fdad1eb chore(deps): update module github.com/grpc-ecosystem/grpc-gateway/v2 to v2.27...
• c46d3ba chore(deps): update golang.org/x/telemetry digest to fcf36f6 (#7843)
• Additional commits viewable in compare view

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 commands and options

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)
  You can disable automated security fix PRs for this repo from the Security Alerts page.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Cache: Disabled due to data retention organization setting

Knowledge base: Disabled due to Reviews -> Disable Knowledge Base setting

📥 Commits

Reviewing files that changed from the base of the PR and between bf148ad and 7baffd8.

⛔ Files ignored due to path filters (1)

• go.sum is excluded by !**/*.sum

📒 Files selected for processing (1)

• go.mod

---

Walkthrough

The PR updates OpenTelemetry indirect dependencies in go.mod from v1.39.0 to v1.40.0, affecting five packages (otel, otel/metric, otel/sdk, otel/sdk/metric, otel/trace). No structural or API changes are introduced.

Changes

Cohort / File(s)	Summary
Dependency Updates go.mod	Updates OpenTelemetry indirect dependencies (otel, otel/metric, otel/sdk, otel/sdk/metric, otel/trace) from v1.39.0 to v1.40.0

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and specifically describes the main change: a dependency bump of go.opentelemetry.io/otel/sdk from 1.39.0 to 1.40.0, which matches the changeset in go.mod.
Description check	✅ Passed	The description is directly related to the changeset, providing detailed information about the dependency bump including changelog, commits, and compatibility details from the upstream release.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch dependabot/go_modules/go.opentelemetry.io/otel/sdk-1.40.0

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: dependabot[bot]
Once this PR has been reviewed and has the lgtm label, please assign rcampos2029 for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci]

Hi @dependabot[bot]. Thanks for your PR.

I'm waiting for a openshift-online member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.