wanglijie95 opened a new pull request, #21621: URL: https://github.com/apache/flink/pull/21621
## What is the purpose of the change Currently, flink will set the correct key context(by call [setKeyContextElement](https://github.com/apache/flink/blob/master/flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/ChainingOutput.java#:~:text=input.setKeyContextElement(castRecord)%3B)) before processing each record, which is typically used to extract key from record and pass that key to the state backends. However, the "setKeyContextElement" is obviously not need for non-keyed stream/operator, in which case we can omit the "setKeyContextElement" calls to improve performance. ## Verifying this change Add test `RecordProcessorUtilsTest` ## 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: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (**no**) - 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**) -- 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]
