Hi, dear community and release managers, Thanks for bringing up the new release candidate for 1.18.
When testing for the batch scenario, I found an issue of frequent flushing in Hybrid shuffle. It is a new bug introduced by 1.18 and may significantly impact the performance of shuffle writing. The fix ticket FLINK-33044[1] has been reviewed and approved. To prevent the performance issues, I would like to backport the fix to release 1.18 unless there are any objections. Glad to hear your suggestions. In addition to this, sorry to start a new email thread to discuss it. I attempted many times to send this email within the existing thread titled "[ANNOUNCE] Release 1.18.0, release candidate #0", but the mail failed to be delivered, that thread looks broken. It is very strange. So I start the new discussion thread. [1] https://issues.apache.org/jira/browse/FLINK-33044 Best, Yuxin
