Apache Hadoop ZooKeeper

Clone this repo:
  1. 1fbaa26 ZOOKEEPER-3704: upgrade maven dependency-check to 5.3.0 by Patrick Hunt · 2 days ago master
  2. 689c8b2 ZOOKEEPER-1936: Server exits when unable to create data directory due to race by Andor Molnar · 2 days ago
  3. b4c5a7f ZOOKEEPER-3698: fixing NoRouteToHostException when starting large cluster locally by Mate Szalay-Beko · 2 days ago
  4. 2d29c56 ZOOKEEPER-3699: upgrade jackson-databind to address CVE-2019-20330 by Patrick Hunt · 2 days ago
  5. c234848 ZOOKEEPER-1112: Add (Cyrus) SASL authentication support to C client library by Damien Diederen · 3 days ago

Apache ZooKeeper Build Status Maven Central License

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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 patch through pull request and our contribution workflow.