FrankChen021 opened a new issue, #20816: URL: https://github.com/apache/druid/issues/20816
_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:** `CompactionSparseColumnTest.testCompactionPerfectRollUpWithLexicographicDimensionSpec` (embedded-tests, `unit tests / unit tests(main) (25, C*)`) **Failures:** 1 · **First seen:** 2026-11-01 · **Last seen:** 2026-11-01 ### Root cause The initial `index_parallel` task in `loadAndVerifyDataWithSparseColumn()` (`CompactionSparseColumnTest.java:168`, via `CompactionTestBase.runTask:74`) did not emit `task/run/time` within `LatchableEmitter`'s default 10 s wait in `EmbeddedClusterApis.waitForTaskToFinish`. With `DynamicPartitionsSpec(3, 3L)` the supervisor task spawns sub-tasks on the cluster's single Indexer, which leaves little headroom on a loaded runner; the two sibling tests in the class passed in the same run, and this is the same mechanism as #20809. The failing commit (#20729) only adds the new TsFile input-format extension, and the same job passed on the neighbouring master commits (e9ab55e057, 46d2de3df9). ### Suggested fix Give compaction tests more headroom for task completion: call `.useDefaultTimeoutForLatchableEmitter(60)` in `CompactionTestBase.createCluster()` (as `StreamIndexTestBase` does), or add an `EmbeddedClusterApis.runTask` overload with a timeout and share it with the fix for #20809. ### 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 | |---|---|---|---|---|---| | 2026-11-01 | 83f76f2d52 (#20729) | `unit tests / unit tests(main) (25, C*) / test-jdk25-[C*]` | [job 124730456995](https://github.com/apache/druid/actions/runs/41266556523/job/124730456995) | `ISE: Timed out waiting for event after [10,000]ms` waiting for the initial `index_parallel` task (line 168); 1/1 attempt | | -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
