junaiddshaukat opened a new issue, #39630: URL: https://github.com/apache/beam/issues/39630
Two related windowing gaps in the Kafka Streams runner. **Merging windows.** Session windows do not work. `ReduceFnRunner` drives merging through a merging window set that moves per-window state as windows merge, which the runner's state backing does not implement. `GroupByKeyTest$WindowTests.testGroupByKeyMergingWindows` and `CombineTest$WindowingTests.testSessionsCombine` are sickbayed for this. **Custom WindowFns.** The runner rebuilds the standard WindowFns from their URNs and interprets them directly, which is what makes a pipeline from any SDK work. A WindowFn the user wrote is opaque to the runner and would have to be executed through the SDK harness that owns it. Part of #18479. -- 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]
