This is a release candidate for 3.9.4. This is a minor release with bug- and security fixes. Important to note that due to security issues we’ve upgraded logback to 1.3.15 and slf4j to 2.0.13. No ZooKeeper code changes have been involved in this upgrade, but the SLF4j upgrade was a major version increase, so keep an eye on that during your testing.
The full release notes is available at: https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310801&version=12355230 *** Please download, test and vote by August 15th 2025, 23:59 UTC+0. *** Source files: https://dist.apache.org/repos/dist/dev/zookeeper/zookeeper-3.9.4-candidate-1/ Maven staging repo: https://repository.apache.org/content/repositories/orgapachezookeeper-1109/ The release candidate tag in git to be voted upon: release-3.9.4-1 https://github.com/apache/zookeeper/tree/release-3.9.4-1 ZooKeeper's KEYS file containing PGP keys we use to sign the release: https://www.apache.org/dist/zookeeper/KEYS The staging version of the website is: https://dist.apache.org/repos/dist/dev/zookeeper/zookeeper-3.9.4-candidate-1/website/index.html Should we release this candidate? Andor
