ZooKeeper is a service for coordinating processes of distributed applications.
Packages 
Package Description
com.nitido.utils.toaster  
org.apache.jute
Hadoop record I/O contains classes and a record description language translator for simplifying serialization and deserialization of records in a language-neutral manner.
org.apache.jute.compiler
This package contains classes needed for code generation from the hadoop record compiler.
org.apache.jute.compiler.generated
This package contains code generated by JavaCC from the Hadoop record syntax file rcc.jj.
org.apache.yetus.audience  
org.apache.zookeeper  
org.apache.zookeeper.admin  
org.apache.zookeeper.audit  
org.apache.zookeeper.cli  
org.apache.zookeeper.client  
org.apache.zookeeper.common  
org.apache.zookeeper.data  
org.apache.zookeeper.graph  
org.apache.zookeeper.graph.filterops  
org.apache.zookeeper.graph.servlets  
org.apache.zookeeper.inspector  
org.apache.zookeeper.inspector.encryption  
org.apache.zookeeper.inspector.gui  
org.apache.zookeeper.inspector.gui.nodeviewer  
org.apache.zookeeper.inspector.logger  
org.apache.zookeeper.inspector.manager  
org.apache.zookeeper.jmx  
org.apache.zookeeper.metrics  
org.apache.zookeeper.metrics.impl  
org.apache.zookeeper.proto  
org.apache.zookeeper.retry  
org.apache.zookeeper.server
ZooKeeper server theory of operation
org.apache.zookeeper.server.admin  
org.apache.zookeeper.server.auth  
org.apache.zookeeper.server.command  
org.apache.zookeeper.server.controller  
org.apache.zookeeper.server.embedded  
org.apache.zookeeper.server.metric  
org.apache.zookeeper.server.persistence  
org.apache.zookeeper.server.quorum  
org.apache.zookeeper.server.quorum.auth  
org.apache.zookeeper.server.quorum.flexible  
org.apache.zookeeper.server.util  
org.apache.zookeeper.server.watch  
org.apache.zookeeper.test.system  
org.apache.zookeeper.txn  
org.apache.zookeeper.util  
org.apache.zookeeper.version