| org.apache.hadoop |  | 
| org.apache.hadoop.conf | Configuration of system parameters. | 
| org.apache.hadoop.crypto |  | 
| org.apache.hadoop.crypto.key |  | 
| org.apache.hadoop.crypto.key.kms |  | 
| org.apache.hadoop.crypto.random |  | 
| org.apache.hadoop.fs | An abstract file system API. | 
| org.apache.hadoop.fs.crypto |  | 
| org.apache.hadoop.fs.ftp |  | 
| org.apache.hadoop.fs.permission |  | 
| org.apache.hadoop.fs.sftp | SFTP FileSystem package. | 
| org.apache.hadoop.fs.shell.find |  | 
| org.apache.hadoop.fs.viewfs |  | 
| org.apache.hadoop.ha |  | 
| org.apache.hadoop.ha.proto |  | 
| org.apache.hadoop.ha.protocolPB |  | 
| org.apache.hadoop.http.lib | This package provides user-selectable (via configuration) classes that add
functionality to the web UI. | 
| org.apache.hadoop.io | Generic i/o code for use when reading and writing data to the network,
to databases, and to files. | 
| org.apache.hadoop.io.compress |  | 
| org.apache.hadoop.io.file.tfile |  | 
| org.apache.hadoop.io.serializer | 
This package provides a mechanism for using different serialization frameworks
in Hadoop. | 
| org.apache.hadoop.io.serializer.avro | 
This package provides Avro serialization in Hadoop. | 
| org.apache.hadoop.ipc.proto |  | 
| org.apache.hadoop.ipc.protobuf |  | 
| org.apache.hadoop.ipc.protocolPB |  | 
| org.apache.hadoop.log |  | 
| org.apache.hadoop.log.metrics |  | 
| org.apache.hadoop.metrics | This package defines an API for reporting performance metric information. | 
| org.apache.hadoop.metrics.ganglia | Implementation of the metrics package that sends metric data to 
Ganglia . | 
| org.apache.hadoop.metrics.spi | The Service Provider Interface for the Metrics API. | 
| org.apache.hadoop.metrics2 | Metrics 2.0 | 
| org.apache.hadoop.metrics2.annotation | Annotation interfaces for metrics instrumentation | 
| org.apache.hadoop.metrics2.filter | Builtin metrics filters (to be used in metrics config files) | 
| org.apache.hadoop.metrics2.lib | A collection of library classes for implementing metrics sources | 
| org.apache.hadoop.metrics2.sink | Builtin metrics sinks | 
| org.apache.hadoop.metrics2.sink.ganglia |  | 
| org.apache.hadoop.metrics2.source |  | 
| org.apache.hadoop.metrics2.util | General helpers for implementing source and sinks | 
| org.apache.hadoop.net | Network-related classes. | 
| org.apache.hadoop.net.unix |  | 
| org.apache.hadoop.record | 
    (DEPRECATED) 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.hadoop.record.compiler | 
    (DEPRECATED) This package contains classes needed for code generation
    from the hadoop record compiler. | 
| org.apache.hadoop.record.compiler.ant |  | 
| org.apache.hadoop.record.compiler.generated | 
    (DEPRECATED) This package contains code generated by JavaCC from the
    Hadoop record syntax file rcc.jj. | 
| org.apache.hadoop.record.meta |  | 
| org.apache.hadoop.security |  | 
| org.apache.hadoop.security.alias |  | 
| org.apache.hadoop.security.authorize |  | 
| org.apache.hadoop.security.http |  | 
| org.apache.hadoop.security.proto |  | 
| org.apache.hadoop.security.protocolPB |  | 
| org.apache.hadoop.security.ssl |  | 
| org.apache.hadoop.security.token |  | 
| org.apache.hadoop.security.token.delegation.web |  | 
| org.apache.hadoop.service |  | 
| org.apache.hadoop.tools |  | 
| org.apache.hadoop.tools.proto |  | 
| org.apache.hadoop.tools.protocolPB |  | 
| org.apache.hadoop.tracing |  | 
| org.apache.hadoop.util | Common utilities. | 
| org.apache.hadoop.util.bloom |  | 
| org.apache.hadoop.util.curator |  | 
| org.apache.hadoop.util.hash |  |