Apache ZooKeeper

Clone this repo:
  1. d12aba5 ZOOKEEPER-4799: Refactor ACL check in 'addWatch' command by Andor Molnar · 5 months ago master
  2. 803c485 ZOOKEEPER-4804. Use daemon threads for Netty client (#2142) by Istvan Toth · 5 weeks ago
  3. bc1fc6d ZOOKEEPER-4276. Serving only with secureClientPort fails (#2117) by Abhilash Kishore · 5 weeks ago
  4. 31c7a7e ZOOKEEPER-4723. Cleanup more in-place bytebuffer manipulations (#2036) by tison · 6 weeks ago
  5. 7074448 ZOOKEEPER-4806: Commits have to be refreshed after merging by szucsvillo · 8 weeks ago

Apache ZooKeeper GitHub Actions CI Travis CI Maven Central License

For the latest information about Apache ZooKeeper, please visit our website at:


and our wiki, at:


Packaging/release artifacts

Either downloaded from https://zookeeper.apache.org/releases.html or found in zookeeper-assembly/target directory after building the project with maven.


    Contains all the source files which can be built by running:
    mvn clean install

    To generate an aggregated apidocs for zookeeper-server and zookeeper-jute:
    mvn javadoc:aggregate
    (generated files will be at target/site/apidocs)


    Contains all the jar files required to run ZooKeeper
    Full documentation can also be found in the docs folder

As of version 3.5.5, the parent, zookeeper and zookeeper-jute artifacts are deployed to the central repository after the release is voted on and approved by the Apache ZooKeeper PMC:


Java 8

If you are going to compile with Java 1.8, you should use a recent release at u211 or above.


We always welcome new contributors to the project! See How to Contribute for details on how to submit patches as pull requests and other aspects of our contribution workflow.