qiuyanjun888 opened a new pull request, #28530: URL: https://github.com/apache/flink/pull/28530
## What is the purpose of the change This pull request adds regression coverage for FLINK-39620. It verifies that after restoring a cumulative window aggregate, flushing the global window buffer before receiving another watermark does not re-emit expired cumulative windows. ## Brief change log - Added a global cumulative window aggregate recovery regression test that snapshots, restores, flushes the buffer, and confirms old windows are not emitted again. - Added a small test helper for building global window aggregate operators with local accumulator rows. ## Verifying this change This change added tests and can be verified as follows: - `./mvnw -pl flink-table/flink-table-runtime -Dtest=SlicingWindowAggOperatorTest#testGlobalEventTimeCumulativeWindowsDoNotRefireExpiredWindowAfterRestore -DskipITs -Drat.skip=true test` - `./mvnw -pl flink-table/flink-table-runtime -Dtest=SlicingWindowAggOperatorTest -DskipITs -Drat.skip=true test` ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): no - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: no - The serializers: no - The runtime per-record code paths (performance sensitive): no - Anything that affects deployment or recovery: no (test-only change) - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? no - If yes, how is the feature documented? not applicable --- ##### Was generative AI tooling used to co-author this PR? - [X] Yes (Hermes Agent / OpenAI GPT-5.5) Generated-by: Hermes Agent (OpenAI GPT-5.5) -- 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]
