[sdk-sentinel-bot]

Caution

This PR contains untrusted AI-generated code. Do not approve or run CI until a maintainer has reviewed the diff. SDK Sentinel verified that GitHub Actions remained approval-gated with zero executable jobs when this PR was opened.

Summary

• CI evidence: failed CI job · workflow run · last known pass · first known failure

Give the fault-injection test enough time to recover in Temporal Cloud. The [target-branch Cloud job](https://github.com/temporalio/sdk-java/actions/runs/40974431076/job/123798841103) timed out while the companion CLI execution passed. No breaking changes; no server PR is required.

Root cause

The test deliberately rejects seven local-activity executor submissions. That fails workflow-task processing and requires server-mediated recovery. Cloud execution, introduced by the Cloud test classification change, can cross the SDK test rule's unrelated 10-second default. The unchanged source [passed immediately before](https://github.com/temporalio/sdk-java/actions/runs/40774443363/job/123119910543) and then [timed out](https://github.com/temporalio/sdk-java/actions/runs/40774855862/job/123121368943).

Fix

Override only this test's JUnit timeout to 30 seconds, preserving its injected failures and completion assertion.

Validation

The focused in-memory test and formatting/compilation checks pass. The fixed validator was blocked only by read-only submodule metadata in the investigation sandbox. Cloud CI remains required to exercise the original mode.

Validation status: validation-incomplete

• Flake confidence: high
• Fix confidence: high
• Value: high
• Patch scope: standard — 1 changed file; 774 B
• Local reproduction: not-reproduced — The in-memory focused test passed before the edit; Temporal Cloud was unavailable locally.
• Regression coverage: pass-after-only — The existing fault-injection test passed after receiving the Cloud-appropriate timeout override.
• Unchanged baseline (Gradle formatting and test-source compilation) — passed
• Independent candidate (Gradle formatting and test-source compilation) — did not pass (failure)

Investigator-run checks

• ./gradlew --offline --no-daemon :temporal-sdk:test --tests 'io.temporal.worker.LocalActivitySlotThreadPoolTests' -x :temporal-serviceclient:initSubmodules -x :temporal-serviceclient:updateSubmodules — passed; 1 attempt(s). The unchanged in-memory test passed, so the Cloud timeout did not reproduce locally.
• ./gradlew --offline --no-daemon :temporal-sdk:cleanTest :temporal-sdk:test --tests 'io.temporal.worker.LocalActivitySlotThreadPoolTests' -x :temporal-serviceclient:initSubmodules -x :temporal-serviceclient:updateSubmodules — passed; 1 attempt(s). The focused class passed after the timeout override.
• .ci-flake-runtime/input/validate.sh — failed; 1 attempt(s). Spotless checks reached the changed module successfully, but validation stopped at temporal-serviceclient:updateSubmodules because the sandbox makes .git/modules metadata read-only. The trusted unchanged baseline had passed.
• ./gradlew --offline --no-daemon spotlessCheck testClasses -x test -x :temporal-serviceclient:initSubmodules -x :temporal-serviceclient:updateSubmodules — passed; 1 attempt(s). The validator's formatting and compilation checks passed when the sandbox-blocked submodule refresh tasks were excluded.

Required target CI

• Continuous Integration / Unit test with cloud
• Canonical candidate validation with writable Git submodule metadata

Residual risks

• The 30-second budget has not been exercised against Temporal Cloud locally.
• The canonical validator could not complete because of the investigation sandbox's read-only .git/modules metadata.

Automation provenance

• Investigator workflow
• Base SHA: 655ef6620e866e07bd7dd848092a74781518dc22

If this finding should not be fixed, apply the sdk-sentinel:false-positive label and close the PR. Sentinel will suppress the finding until its affected source changes.

SDK Sentinel recurrence history

• Unique failed CI run attempts: 6
• First occurrence: 2026-10-29 23:49 UTC
• Latest occurrence: 2026-10-31 06:33 UTC
• Recent occurrences:
  • 2026-10-31 06:33 UTC — failed CI job
  • 2026-10-31 05:57 UTC — failed CI job
  • 2026-10-30 22:14 UTC — failed CI job
  • 2026-10-30 20:29 UTC — failed CI job
  • 2026-10-30 01:01 UTC — failed CI job
  • 2026-10-29 23:49 UTC — failed CI job