Apache ZooKeeper alternatives and similar libraries
Based on the "Distributed Applications" category
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Akka
Toolkit and runtime for building concurrent, distributed, and fault tolerant event-driven applications. -
Dropwizard Circuit Breaker
Circuit breaker design pattern for dropwizard.
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README
Apache ZooKeeper 
For the latest information about Apache ZooKeeper, please visit our website at:
and our wiki, at:
https://cwiki.apache.org/confluence/display/ZOOKEEPER
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.
apache-zookeeper-[version].tar.gz
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)
apache-zookeeper-[version]-bin.tar.gz
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:
https://repo1.maven.org/maven2/org/apache/zookeeper/zookeeper/
Java 8
If you are going to compile with Java 1.8, you should use a recent release at u211 or above.
Contributing
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.
*Note that all licence references and agreements mentioned in the Apache ZooKeeper README section above
are relevant to that project's source code only.