Rollout `junit_test_report_search` feature flag
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## Summary
Roll out [JUnit report search](https://gitlab.com/gitlab-org/gitlab/-/issues/213691) currently behind the `junit_test_report_search` feature flag.
- DRI: @arcesium-kumsaura
- Team Slack channel: `#g_pipeline-execution`
> [!note]
> Process and guidance live in the docs — this issue is just the commands and a place to track the rollout.
> "Rolling out" means incrementally enabling the flag on GitLab.com to validate stability — it is not the same as releasing the feature, which happens when the flag is removed.
> [Feature flag controls](https://docs.gitlab.com/development/feature_flags/controls/) · [Feature flag lifecycle](https://handbook.gitlab.com/handbook/product-development/how-we-work/product-development-flow/feature-flag-lifecycle/#feature-flag-lifecycle)
## What could go wrong?
- **Performance degradation**: When searching across all jobs in large pipelines (>20 jobs), multiple HTTP requests are made to fetch JUnit XML artifacts. This could cause increased load on artifact storage.
- **Client-side memory issues**: For pipelines with many test cases, loading all suites into memory for client-side filtering could cause browser performance issues.
- **UI regressions**: The new search box and results table could have layout issues in edge cases or with certain screen sizes.
## Events
- [Exceptions with junit_test_report_search:1](https://log.gprd.gitlab.net/app/discover#/?_g=(time:(from:now-1d,to:now))&_a=(index:'7092c4e2-4eb5-46f2-8305-a7da2edad090',query:(language:kuery,query:'json.exception.feature_flag_states.keyword:%22junit_test_report_search:1%22'),columns:!(json.exception.class,json.exception.message,json.extra.workflow_id,json.meta.caller_id),sort:!(!(json.time,desc))))
- [Events with junit_test_report_search:1](https://log.gprd.gitlab.net/app/discover#/?_g=(time:(from:now-1d,to:now))&_a=(index:'7092c4e2-4eb5-46f2-8305-a7da2edad090',query:(language:kuery,query:'json.feature_flag_states:%22junit_test_report_search:1%22'),columns:!(json.meta.caller_id,json.feature_flag_states),sort:!(!(json.time,desc))))
- [Error rate and other graphs by modifying the examples in the Visualization Library](https://log.gprd.gitlab.net/app/visualize#/?_g=h@358d019&s=FF%20Observability)
Feature Flag events are only logged by default for feature flags marked for the current or future milestones. To enable while the feature flag is active, see https://docs.gitlab.com/development/feature_flags/#logging
## Rollout
Run all production chatops in [`#production`](https://gitlab.slack.com/archives/C101F3796) and cross-post the results to `#g_pipeline-execution`. Background: [incremental rollout process](https://docs.gitlab.com/development/feature_flags/controls/#process), [feature actors](https://docs.gitlab.com/development/feature_flags/#feature-actors).
**Non-production**
```
chatops gitlab run feature set junit_test_report_search 50 --actors --dev --pre --staging --staging-ref
chatops gitlab run feature set junit_test_report_search true --dev --pre --staging --staging-ref
```
**Production** — percentage rollout (wait ≥15 min between steps, watch dashboards):
```
chatops gitlab run feature set junit_test_report_search <percentage> --actors
```
Or target specific actors instead:
```
chatops gitlab run feature set --project=gitlab-org/gitlab,gitlab-org/gitlab-foss junit_test_report_search true
chatops gitlab run feature set --group=gitlab-org,gitlab-com junit_test_report_search true
chatops gitlab run feature set --user=arcesium-kumsaura junit_test_report_search true
```
## Before global rollout
Confirm the relevant gotchas before going to 100% — see [enabling a feature for GitLab.com](https://docs.gitlab.com/development/feature_flags/controls/#enabling-a-feature-for-gitlabcom):
- [ ] [Docs + version history](https://docs.gitlab.com/development/documentation/feature_flags/) updated
- [ ] [Breaking changes](https://docs.gitlab.com/development/documentation/release_notes/#deprecations-removals-and-breaking-changes) announced, if any
- [ ] [Change management issue](https://handbook.gitlab.com/handbook/engineering/infrastructure-platforms/change-management/#feature-flags-and-the-change-management-process) opened, if required
- [ ] [External API consumers](https://docs.gitlab.com/development/feature_flags/#do-not-use-feature-flags-in-external-api-consumers) handled with a fail-open mechanism, if applicable
## Cleanup
Remove the flag once [deemed stable](https://handbook.gitlab.com/handbook/product-development/how-we-work/product-development-flow/feature-flag-lifecycle/#feature-flag-lifecycle) — see [cleaning up](https://docs.gitlab.com/development/feature_flags/controls/#cleaning-up). Track it here, or open a follow-up [Feature Flag Cleanup issue](https://gitlab.com/gitlab-org/gitlab/-/work_items/new?description_template=Feature%20Flag%20Cleanup). Remove the flag and its YAML definition from the codebase, then:
```
chatops gitlab run release check <merge-request-url> <milestone>
chatops gitlab run feature delete junit_test_report_search --dev --pre --staging --staging-ref --production
```
## Rollback
```
chatops gitlab run feature set junit_test_report_search false # production
chatops gitlab run feature set junit_test_report_search false --dev --pre --staging --staging-ref # non-production
chatops gitlab run feature delete junit_test_report_search --dev --pre --staging --staging-ref --production # remove entirely
```
issue
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