---
title: Apache BookKeeper 4.12.1 Release Notes
---

This is the 24rd release of Apache BookKeeper, it contains a few bugfixes, new features and dependency upgrades

Apache BookKeeper users are encouraged to [upgrade to 4.12.1](../../admin/upgrade). The technical details of this release are summarized
below.

## News and noteworthy
- [https://github.com/apache/bookkeeper/pull/2519] Allow DNSToSwitchMapping to access BookieAddressResolver
- [https://github.com/apache/bookkeeper/pull/2493] Opportunistic Striping
- [https://github.com/apache/bookkeeper/pull/2398] getBookieInfo is stuck if no bookie is up
- [https://github.com/apache/bookkeeper/pull/2491] Upgrade to Curator 5.1
- [https://github.com/apache/bookkeeper/pull/2523] Update jcommander from 1.48 to 1.78

## Details

https://github.com/apache/bookkeeper/issues?q=+label%3Arelease%2F4.12.1+