| Name | Description | Type | Package | Framework |
| DistributedWorkQueue | Provides a way to push work out to tablet servers via zookeeper and wait for that work to be done. | Class | org.apache.accumulo.server.zookeeper | Apache Accumulo |
| DistributedWorkQueue .Processor | Interface | org.apache.accumulo.server.zookeeper.DistributedWorkQueue | Apache Accumulo | |
| TransactionWatcher | Class | org.apache.accumulo.server.zookeeper | Apache Accumulo | |
| TransactionWatcher .ZooArbitrator | Class | org.apache.accumulo.server.zookeeper.TransactionWatcher | Apache Accumulo | |
| ZooCache | Class | org.apache.accumulo.server.zookeeper | Apache Accumulo | |
| ZooLock | Class | org.apache.accumulo.server.zookeeper | Apache Accumulo | |
| ZooQueueLock | Class | org.apache.accumulo.server.zookeeper | Apache Accumulo | |
| ZooReaderWriter | Class | org.apache.accumulo.server.zookeeper | Apache Accumulo | |
| ZooReaderWriterFactory | A factory for ZooReaderWriter objects. | Class | org.apache.accumulo.server.zookeeper | Apache Accumulo |