site/docs/4.10.0/overview/releaseNotes.md

title: Apache BookKeeper 4.10.0 Release Notes

This is the 20th release of Apache BookKeeper!

The 4.10.0 release incorporates hundreds of bug fixes, improvements, and features since previous major release, 4.9.0.

Apache BookKeeper/DistributedLog users are encouraged to upgrade to 4.10.0. The technical details of this release are summarized below.

[https://github.com/apache/bookkeeper/pull/2069] Use pure python implementation of MurmurHash
[https://github.com/apache/bookkeeper/pull/1934] Bump Netty and GRPC version
[https://github.com/apache/bookkeeper/pull/1907] Add new bkctl shell tool
[https://github.com/apache/bookkeeper/issues/1602] Cluster Metadata Checker
[https://github.com/apache/bookkeeper/pull/2154] Auto refresh TLS certificate at bookie-server
[https://github.com/apache/bookkeeper/pull/2150] Improve journal throughput when journalSyncData is disabled.
[https://github.com/apache/bookkeeper/pull/2147] Journal should respect to flushWhenQueueEmpty setting
[https://github.com/apache/bookkeeper/pull/2132] Make default Bookie scripts work on JDK11+
[https://github.com/apache/bookkeeper/pull/2128] Allow to override default SASL service name ‘bookkeeper’
[https://github.com/apache/bookkeeper/pull/2117] BookKeeper Admin API: Implement a method to get all the Bookies
[https://github.com/apache/bookkeeper/pull/2111] Ensure getStickyReadBookieIndex returns valid bookie index