Overview (Apache Hadoop Main 3.4.0-SNAPSHOT API)

Common
Package	Description
org.apache.hadoop
org.apache.hadoop.applications.mawo.server.common	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.applications.mawo.server.master.job	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.applications.mawo.server.worker	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.benchmark	Benchmark for Vectored Read IO operations.
org.apache.hadoop.benchmark.generated
org.apache.hadoop.classification
org.apache.hadoop.conf	Configuration of system parameters.
org.apache.hadoop.contrib.utils.join
org.apache.hadoop.crypto
org.apache.hadoop.crypto.key	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.crypto.key.kms
org.apache.hadoop.crypto.key.kms.server
org.apache.hadoop.crypto.random
org.apache.hadoop.examples	Hadoop example code.
org.apache.hadoop.examples.dancing	This package is a distributed implementation of Knuth's dancing links algorithm that can run under Hadoop.
org.apache.hadoop.examples.pi	This package consists of a map/reduce application, distbbp, which computes exact binary digits of the mathematical constant π.
org.apache.hadoop.examples.pi.math	This package provides useful mathematical library classes for the distbbp program.
org.apache.hadoop.examples.terasort	This package consists of 3 map/reduce applications for Hadoop to compete in the annual terabyte sort competition.
org.apache.hadoop.filecache
org.apache.hadoop.fs	Implementations of `AbstractFileSystem` for hdfs over rpc and hdfs over web.
org.apache.hadoop.fs.adl	Supporting classes for metrics instrumentation.
org.apache.hadoop.fs.adl.oauth2	public interface to expose OAuth2 authentication related features.
org.apache.hadoop.fs.aliyun.oss	Aliyun OSS Filesystem.
org.apache.hadoop.fs.audit	Public classes for adding information to any auditing information picked up by filesystem clients.
org.apache.hadoop.fs.azure	A distributed implementation of `FileSystem` for reading and writing files on Azure Block Storage.
org.apache.hadoop.fs.azure.metrics	Infrastructure for a Metrics2 source that provides information on Windows Azure Filesystem for Hadoop instances.
org.apache.hadoop.fs.azurebfs	A distributed implementation of `FileSystem` for reading and writing files on Azure Storage.
org.apache.hadoop.fs.azurebfs.constants
org.apache.hadoop.fs.azurebfs.contracts
org.apache.hadoop.fs.azurebfs.contracts.exceptions
org.apache.hadoop.fs.azurebfs.contracts.services
org.apache.hadoop.fs.azurebfs.enums
org.apache.hadoop.fs.azurebfs.oauth2	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.fs.cosn	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.fs.cosn.auth	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.fs.crypto
org.apache.hadoop.fs.ftp
org.apache.hadoop.fs.http	Filesystem implementations that allow Hadoop to read directly from HTTP / HTTPS endpoints.
org.apache.hadoop.fs.http.client
org.apache.hadoop.fs.http.server
org.apache.hadoop.fs.http.server.metrics	A package to implement metrics for the HttpFS Server.
org.apache.hadoop.fs.obs	Package for supporting HuaweiCloud Object Storage Service (OBS) as a backend filesystem in Hadoop.
org.apache.hadoop.fs.protocolPB	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.fs.s3native	A distributed implementation of `FileSystem` for reading and writing files on Amazon S3.
org.apache.hadoop.fs.sftp	SFTP FileSystem package.
org.apache.hadoop.fs.shell.find
org.apache.hadoop.fs.statistics	This package contains support for statistic collection and reporting.
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.erasurecode
org.apache.hadoop.io.erasurecode.coder.util
org.apache.hadoop.io.erasurecode.grouper
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.lib.lang
org.apache.hadoop.lib.server
org.apache.hadoop.lib.service
org.apache.hadoop.lib.service.hadoop
org.apache.hadoop.lib.service.instrumentation
org.apache.hadoop.lib.service.scheduler
org.apache.hadoop.lib.service.security
org.apache.hadoop.lib.servlet
org.apache.hadoop.lib.util
org.apache.hadoop.lib.wsrs
org.apache.hadoop.log
org.apache.hadoop.maven.plugin.cmakebuilder
org.apache.hadoop.maven.plugin.paralleltests
org.apache.hadoop.maven.plugin.protoc	Plugins to generate Java files based on protocol buffers with the protoc command.
org.apache.hadoop.maven.plugin.resourcegz
org.apache.hadoop.maven.plugin.util
org.apache.hadoop.maven.plugin.versioninfo
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.minikdc
org.apache.hadoop.mount
org.apache.hadoop.net	Network-related classes.
org.apache.hadoop.net.unix
org.apache.hadoop.nfs
org.apache.hadoop.nfs.nfs3
org.apache.hadoop.nfs.nfs3.request
org.apache.hadoop.nfs.nfs3.response
org.apache.hadoop.oncrpc
org.apache.hadoop.oncrpc.security
org.apache.hadoop.portmap
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.registry.cli
org.apache.hadoop.registry.client.api	YARN Registry Client API.
org.apache.hadoop.registry.client.binding	Registry binding utility classes.
org.apache.hadoop.registry.client.exceptions	Registry Service Exceptions
org.apache.hadoop.registry.client.impl	Registry client services
org.apache.hadoop.registry.client.impl.zk	Core Zookeeper support.
org.apache.hadoop.registry.client.types	This package contains all the data types which can be saved to the registry and/or marshalled to and from JSON.
org.apache.hadoop.registry.client.types.yarn
org.apache.hadoop.registry.conf	Configuration for the Hadoop Service Registry.
org.apache.hadoop.registry.server	Server-side classes for the registry
org.apache.hadoop.registry.server.dns	DNS Server classes.
org.apache.hadoop.registry.server.integration	This package contains the classes which integrate with the YARN resource manager.
org.apache.hadoop.registry.server.services	Basic services for the YARN registry The `RegistryAdminService` extends the shared YARN Registry client with registry setup and (potentially asynchronous) administrative actions.
org.apache.hadoop.resourceestimator.common.api	The common APIs for the resource estimator.
org.apache.hadoop.resourceestimator.common.config	The common configuration for the resource estimator.
org.apache.hadoop.resourceestimator.common.exception	The common exception for the resource estimator.
org.apache.hadoop.resourceestimator.common.serialization	SkylineStore serialization module.
org.apache.hadoop.resourceestimator.service	Resource estimator service.
org.apache.hadoop.resourceestimator.skylinestore.api	APIs for the `SkylineStore`.
org.apache.hadoop.resourceestimator.skylinestore.exceptions	SkylineStore exception module.
org.apache.hadoop.resourceestimator.skylinestore.impl	Implementation for `SkylineStore`.
org.apache.hadoop.resourceestimator.skylinestore.validator	Validator for `SkylineStore`.
org.apache.hadoop.resourceestimator.solver.api	API for `Solver`.
org.apache.hadoop.resourceestimator.solver.exceptions	Exception module.
org.apache.hadoop.resourceestimator.solver.impl	Implementation for `Solver`.
org.apache.hadoop.resourceestimator.solver.preprocess	Preprocessor for `Solver`.
org.apache.hadoop.resourceestimator.translator.api	API for `Translator`.
org.apache.hadoop.resourceestimator.translator.exceptions	Exception for `Translator`.
org.apache.hadoop.resourceestimator.translator.impl	Implementation for `Translator`.
org.apache.hadoop.resourceestimator.translator.validator	Validator for `Translator`.
org.apache.hadoop.security
org.apache.hadoop.security.alias	Provides the hadoop credential provider API.
org.apache.hadoop.security.authentication.client
org.apache.hadoop.security.authentication.examples
org.apache.hadoop.security.authentication.util
org.apache.hadoop.security.authorize	Support for service-level authorization.
org.apache.hadoop.security.http	Filters for HTTP service security.
org.apache.hadoop.security.proto
org.apache.hadoop.security.protocolPB
org.apache.hadoop.security.ssl
org.apache.hadoop.security.token	Support for delegation tokens.
org.apache.hadoop.security.token.delegation.web
org.apache.hadoop.service	Support for services.
org.apache.hadoop.service.launcher	This package contains classes, interfaces and exceptions to launch YARN services from the command line.
org.apache.hadoop.streaming	`Hadoop Streaming` is a utility which allows users to create and run Map-Reduce jobs with any executables (e.g.
org.apache.hadoop.streaming.io
org.apache.hadoop.streaming.mapreduce
org.apache.hadoop.tools	Command-line tools for MapReduce.
org.apache.hadoop.tools.fedbalance	FedBalance is a tool for balancing data across federation clusters.
org.apache.hadoop.tools.mapred
org.apache.hadoop.tools.mapred.lib
org.apache.hadoop.tools.proto
org.apache.hadoop.tools.protocolPB
org.apache.hadoop.tools.rumen	Rumen is a data extraction and analysis tool built for Apache Hadoop.
org.apache.hadoop.tools.rumen.anonymization
org.apache.hadoop.tools.rumen.datatypes
org.apache.hadoop.tools.rumen.datatypes.util
org.apache.hadoop.tools.rumen.serializers
org.apache.hadoop.tools.rumen.state
org.apache.hadoop.tools.util
org.apache.hadoop.tracing
org.apache.hadoop.typedbytes	Typed bytes are sequences of bytes in which the first byte is a type code.
org.apache.hadoop.util	Common utilities.
org.apache.hadoop.util.bloom
org.apache.hadoop.util.curator	This package provides utilities to interact with Curator ZooKeeper.
org.apache.hadoop.util.functional	Support for functional programming within the Hadoop APIs.
org.apache.hadoop.util.hash

HDFS
Package	Description
org.apache.hadoop.hdfs	A distributed implementation of `FileSystem`.
org.apache.hadoop.hdfs.client	This package provides the administrative APIs for HDFS.
org.apache.hadoop.hdfs.client.impl	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.hdfs.federation.protocol.proto
org.apache.hadoop.hdfs.inotify
org.apache.hadoop.hdfs.net
org.apache.hadoop.hdfs.nfs.conf
org.apache.hadoop.hdfs.nfs.mount
org.apache.hadoop.hdfs.nfs.nfs3
org.apache.hadoop.hdfs.protocol	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.hdfs.protocol.datatransfer	This package contains classes related to hdfs data transfer protocol.
org.apache.hadoop.hdfs.protocol.datatransfer.sasl
org.apache.hadoop.hdfs.protocol.proto
org.apache.hadoop.hdfs.protocolPB	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.hdfs.qjournal.client
org.apache.hadoop.hdfs.qjournal.protocol
org.apache.hadoop.hdfs.qjournal.protocolPB
org.apache.hadoop.hdfs.qjournal.server
org.apache.hadoop.hdfs.rbfbalance	FedBalance is a tool for balancing data across federation clusters.
org.apache.hadoop.hdfs.security.token.block
org.apache.hadoop.hdfs.security.token.delegation
org.apache.hadoop.hdfs.server.aliasmap
org.apache.hadoop.hdfs.server.balancer
org.apache.hadoop.hdfs.server.blockmanagement
org.apache.hadoop.hdfs.server.common
org.apache.hadoop.hdfs.server.common.blockaliasmap	The AliasMap defines mapping of PROVIDED HDFS blocks to data in remote storage systems.
org.apache.hadoop.hdfs.server.common.blockaliasmap.impl
org.apache.hadoop.hdfs.server.datanode
org.apache.hadoop.hdfs.server.datanode.fsdataset
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl
org.apache.hadoop.hdfs.server.datanode.metrics
org.apache.hadoop.hdfs.server.datanode.web	Data node HTTP classes.
org.apache.hadoop.hdfs.server.datanode.web.webhdfs
org.apache.hadoop.hdfs.server.diskbalancer	Disk Balancer connects to a `.DataNode` and attempts to spread data across all volumes evenly.
org.apache.hadoop.hdfs.server.diskbalancer.command	Commands for disk balancer command line tool.
org.apache.hadoop.hdfs.server.diskbalancer.connectors	Connectors package is a set of logical connectors that connect to various data sources to read the hadoop cluster information.
org.apache.hadoop.hdfs.server.diskbalancer.datamodel	Disk Balancer Data Model is the Data Model for the cluster that Disk Balancer is working against.
org.apache.hadoop.hdfs.server.diskbalancer.planner	Planner takes a DiskBalancerVolumeSet, threshold and computes a series of steps that lead to an even data distribution between volumes of this DiskBalancerVolumeSet.
org.apache.hadoop.hdfs.server.mover	Mover is a data migration tool for tiered storage.
org.apache.hadoop.hdfs.server.namenode
org.apache.hadoop.hdfs.server.namenode.ha
org.apache.hadoop.hdfs.server.namenode.ha.proto
org.apache.hadoop.hdfs.server.namenode.metrics
org.apache.hadoop.hdfs.server.namenode.snapshot
org.apache.hadoop.hdfs.server.namenode.top
org.apache.hadoop.hdfs.server.namenode.top.metrics
org.apache.hadoop.hdfs.server.namenode.top.window
org.apache.hadoop.hdfs.server.namenode.visitor	Use the visitor pattern to visit namespace tree.
org.apache.hadoop.hdfs.server.namenode.web.resources
org.apache.hadoop.hdfs.server.sps.metrics	This package provides the ability to expose external SPS metrics to JMX.
org.apache.hadoop.hdfs.shortcircuit
org.apache.hadoop.hdfs.tools
org.apache.hadoop.hdfs.tools.federation	It includes the tools to manage the Router-based federation.
org.apache.hadoop.hdfs.tools.offlineEditsViewer
org.apache.hadoop.hdfs.tools.offlineImageViewer
org.apache.hadoop.hdfs.tools.snapshot
org.apache.hadoop.hdfs.util	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.hdfs.web
org.apache.hadoop.hdfs.web.oauth2	OAuth2-based WebHDFS authentication.
org.apache.hadoop.hdfs.web.resources

MapReduce
Package	Description
org.apache.hadoop.mapred
org.apache.hadoop.mapred.gridmix
org.apache.hadoop.mapred.gridmix.emulators.resourceusage
org.apache.hadoop.mapred.jobcontrol
org.apache.hadoop.mapred.join
org.apache.hadoop.mapred.lib
org.apache.hadoop.mapred.lib.aggregate
org.apache.hadoop.mapred.lib.db
org.apache.hadoop.mapred.nativetask
org.apache.hadoop.mapred.nativetask.buffer
org.apache.hadoop.mapred.nativetask.handlers
org.apache.hadoop.mapred.nativetask.serde
org.apache.hadoop.mapred.nativetask.util
org.apache.hadoop.mapred.pipes
org.apache.hadoop.mapred.proto
org.apache.hadoop.mapred.tools	Command-line tools associated with MapReduce.
org.apache.hadoop.mapred.uploader	Package org.apache.hadoop.mapred.uploader contains classes related to the MapReduce framework upload tool.
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.checkpoint
org.apache.hadoop.mapreduce.counters	This package contains the implementations of different types of map-reduce counters.
org.apache.hadoop.mapreduce.lib.aggregate
org.apache.hadoop.mapreduce.lib.chain
org.apache.hadoop.mapreduce.lib.db
org.apache.hadoop.mapreduce.lib.fieldsel
org.apache.hadoop.mapreduce.lib.input
org.apache.hadoop.mapreduce.lib.jobcontrol
org.apache.hadoop.mapreduce.lib.join
org.apache.hadoop.mapreduce.lib.map
org.apache.hadoop.mapreduce.lib.output
org.apache.hadoop.mapreduce.lib.output.committer.manifest.files	Persistence formats.
org.apache.hadoop.mapreduce.lib.partition
org.apache.hadoop.mapreduce.lib.reduce
org.apache.hadoop.mapreduce.server.jobtracker
org.apache.hadoop.mapreduce.server.tasktracker
org.apache.hadoop.mapreduce.task.annotation
org.apache.hadoop.mapreduce.tools
org.apache.hadoop.mapreduce.v2
org.apache.hadoop.mapreduce.v2.api.protocolrecords
org.apache.hadoop.mapreduce.v2.app.rm.preemption
org.apache.hadoop.mapreduce.v2.app.webapp.dao
org.apache.hadoop.mapreduce.v2.hs
org.apache.hadoop.mapreduce.v2.hs.client
org.apache.hadoop.mapreduce.v2.hs.proto
org.apache.hadoop.mapreduce.v2.hs.protocolPB
org.apache.hadoop.mapreduce.v2.hs.server
org.apache.hadoop.mapreduce.v2.hs.webapp.dao
org.apache.hadoop.mapreduce.v2.security

YARN
Package	Description
org.apache.hadoop.yarn	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.ams	Public api for Application Master Service interceptors.
org.apache.hadoop.yarn.api	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.api.protocolrecords	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.api.records	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.api.records.impl	Package org.apache.hadoop.yarn.api.records.impl contains classes which define basic resources.
org.apache.hadoop.yarn.api.records.timeline	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.api.records.timelineservice	Package org.apache.hadoop.yarn.api.records.timelineservice contains classes which define the data model for ATSv2.
org.apache.hadoop.yarn.appcatalog.application	Application Catalog.
org.apache.hadoop.yarn.appcatalog.controller	Application Catalog controllers.
org.apache.hadoop.yarn.appcatalog.model	Application Catalog Data Models.
org.apache.hadoop.yarn.appcatalog.utils	Application Catalog Utilities classes.
org.apache.hadoop.yarn.applications.distributedshell	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.applications.unmanagedamlauncher
org.apache.hadoop.yarn.client
org.apache.hadoop.yarn.client.api
org.apache.hadoop.yarn.client.api.async
org.apache.hadoop.yarn.client.api.async.impl
org.apache.hadoop.yarn.client.api.impl
org.apache.hadoop.yarn.client.cli
org.apache.hadoop.yarn.client.util
org.apache.hadoop.yarn.conf	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.csi	This package contains classes for CSI.
org.apache.hadoop.yarn.csi.adaptor	This package contains CSI adaptor classes.
org.apache.hadoop.yarn.csi.client	This package contains CSI client classes.
org.apache.hadoop.yarn.csi.translator	This package contains classes for protocol translation between YARN and CSI.
org.apache.hadoop.yarn.csi.utils	This package contains utility classes for CSI.
org.apache.hadoop.yarn.event	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.exceptions	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.federation.proto
org.apache.hadoop.yarn.logaggregation	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.logaggregation.filecontroller	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.logaggregation.filecontroller.ifile	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.logaggregation.filecontroller.tfile	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.nodelabels
org.apache.hadoop.yarn.nodelabels.event
org.apache.hadoop.yarn.security	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.security.admin	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.security.client	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.security.client.impl.pb	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.service.api
org.apache.hadoop.yarn.service.api.records
org.apache.hadoop.yarn.service.component
org.apache.hadoop.yarn.service.component.instance
org.apache.hadoop.yarn.service.conf
org.apache.hadoop.yarn.service.containerlaunch
org.apache.hadoop.yarn.service.exceptions
org.apache.hadoop.yarn.service.impl.pb.client
org.apache.hadoop.yarn.service.impl.pb.service
org.apache.hadoop.yarn.service.monitor
org.apache.hadoop.yarn.service.monitor.probe
org.apache.hadoop.yarn.service.provider
org.apache.hadoop.yarn.service.provider.defaultImpl
org.apache.hadoop.yarn.service.provider.docker
org.apache.hadoop.yarn.service.provider.tarball
org.apache.hadoop.yarn.service.registry
org.apache.hadoop.yarn.service.utils
org.apache.hadoop.yarn.sharedcache
org.apache.hadoop.yarn.sls
org.apache.hadoop.yarn.sls.appmaster	Application Master simulators for the SLS.
org.apache.hadoop.yarn.sls.conf
org.apache.hadoop.yarn.sls.nodemanager
org.apache.hadoop.yarn.sls.resourcemanager
org.apache.hadoop.yarn.sls.scheduler
org.apache.hadoop.yarn.sls.synthetic	Classes comprising the synthetic load generator for SLS.
org.apache.hadoop.yarn.sls.utils	Utility classes for SLS.
org.apache.hadoop.yarn.sls.web
org.apache.hadoop.yarn.state	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.util	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.util.constraint	Package org.apache.hadoop.yarn.util.constraint contains classes which is used as utility class for placement constraints.
org.apache.hadoop.yarn.util.csi	Package that includes some CSI utility classes.
org.apache.hadoop.yarn.util.resource	Package org.apache.hadoop.yarn.util.resource contains classes which is used as utility class for resource profile computations.
org.apache.hadoop.yarn.util.timeline	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.