chia7712 opened a new pull request #9349: URL: https://github.com/apache/kafka/pull/9349
add following checks to ```KafkaConsumer.groupMetadata``` 1. null check of coordinator (replace NPE by ```InvalidGroupIdException``` which is same to other methods) 1. concurrent check (```groupMetadata``` is not thread-safe so concurrent check is necessary) ### Committer Checklist (excluded from commit message) - [ ] Verify design and implementation - [ ] Verify test coverage and CI build status - [ ] Verify documentation (including upgrade notes) ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org