FrankChen021 opened a new issue, #20429:
URL: https://github.com/apache/druid/issues/20429
_This issue was generated automatically by Claude Code (Anthropic's AI
coding agent) running a scheduled CI-triage routine on behalf of @FrankChen021.
Analysis and suggested fixes are AI-produced; please verify before acting on
them._
**Status:** Open: no fix PR
**Subject:**
`SeekableStreamSupervisorStateTest.testSupervisorStopTaskGroupEarly`
(indexing-service, `unit tests (25, S*)`)
**Failures:** 2 · **First seen:** 2026-09-10 · **Last seen:** 2026-09-15
### Root cause
Race: the test treats `getNoticesQueueSize() == 0` as "handoff notice
handled". The notice thread `poll()`s the notice before calling `handle()`, so
the queue can be empty before `handoffEarly` is set. `runInternal()` then never
calls `TaskQueue.shutdown("id1", ...)`, and EasyMock reports `expected: 1,
actual: 0`. Under load it fails all 4 surefire attempts.
### Suggested fix
In `TestSeekableStreamSupervisor`, override `emitNoticeProcessTime` to count
down a `CountDownLatch` for `handoff_task_group_notice`. Replace the `while
(getNoticesQueueSize() > 0) sleep` loop with `latch.await(timeout)`.
### Occurrences
Failed push-triggered master jobs only. The daily triage routine adds one
row per new failed job.
| Date | Commit | Job | Failure log | Detail | Reported in |
|---|---|---|---|---|---|
| 2026-09-10 | 1f68c5e168 (#19818) | `unit tests (25, S*)` | [job
102763954928](https://github.com/apache/druid/actions/runs/34443744711/job/102763954928)
| EasyMock `TaskQueue.shutdown` expected 1, actual 0; 4/4 attempts | #20312 |
| 2026-09-15 | 76ddcf297e (#20307) | `unit tests (25, S*)` | [job
104262934243](https://github.com/apache/druid/actions/runs/34932320184/job/104262934243)
| same; 4/4 attempts | #20360 |
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