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# Classes and Interfaces in #Apache Hadoop - 786 results found.
NameDescriptionTypePackageFrameworkJavaDoc
AbstractCountersAn abstract class to provide common implementation for the Counters container in both mapred and mapreduce packages.Classorg.apache.hadoop.mapreduce.countersApache Hadoopjavadoc
AbstractDNSToSwitchMappingThis is a base class for DNS to Switch mappings.Classorg.apache.hadoop.netApache Hadoopjavadoc
AbstractEventParent class of all the events.Classorg.apache.hadoop.yarn.eventApache Hadoopjavadoc
AbstractFileSystemThis class provides an interface for implementors of a Hadoop file system (analogous to the VFS of Unix).Classorg.apache.hadoop.fsApache Hadoopjavadoc
AbstractLivelinessMonitorA simple liveliness monitor with which clients can register, trust the component to monitor liveliness, get a call-back on expiry and then finallyClassorg.apache.hadoop.yarn.utilApache Hadoopjavadoc
AbstractMapWritableAbstract base class for MapWritable and SortedMapWritable Unlike org.Classorg.apache.hadoop.ioApache Hadoopjavadoc
AbstractMetricClassorg.apache.hadoop.metrics2Apache Hadoopjavadoc
AbstractMetricsContextThe main class of the Service Provider Interface.Classorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
AbstractServiceThis is the base implementation class for services.Classorg.apache.hadoop.serviceApache Hadoopjavadoc
AccessControlExceptionAn exception class for access control related issues.Classorg.apache.hadoop.fs.permissionApache Hadoopjavadoc
AclEntryDefines a single entry in an ACL.Classorg.apache.hadoop.fs.permissionApache Hadoopjavadoc
AclEntryScopeSpecifies the scope or intended usage of an ACL entry.Classorg.apache.hadoop.fs.permissionApache Hadoopjavadoc
AclEntryTypeSpecifies the type of an ACL entry.Classorg.apache.hadoop.fs.permissionApache Hadoopjavadoc
AclStatusAn AclStatus contains the ACL information of a specific file.Classorg.apache.hadoop.fs.permissionApache Hadoopjavadoc
AddingCompositeServiceComposite service that exports the add/remove methods.Classorg.apache.hadoop.registry.server.servicesApache Hadoopjavadoc
AddressTypesEnum of address types -as integers.Interfaceorg.apache.hadoop.registry.client.typesApache Hadoopjavadoc
AdminSecurityInfoClassorg.apache.hadoop.yarn.security.adminApache Hadoopjavadoc
AggregatedLogFormatClassorg.apache.hadoop.yarn.logaggregationApache Hadoopjavadoc
AHSClientClassorg.apache.hadoop.yarn.client.apiApache Hadoopjavadoc
AHSProxyClassorg.apache.hadoop.yarn.clientApache Hadoopjavadoc
AllocateRequestThe core request sent by the ApplicationMaster to the ResourceManager to obtain resources in the cluster.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
AllocateResponseThe response sent by the ResourceManager the ApplicationMaster during resource negotiation.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
AMCommandCommand sent by the Resource Manager to the Application Master in the See Also:AllocateResponseClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
AMRMClientClassorg.apache.hadoop.yarn.client.apiApache Hadoopjavadoc

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AMRMClientAsyncAMRMClientAsync handles communication with the ResourceManager and provides asynchronous updates on events such as container allocations andClassorg.apache.hadoop.yarn.client.api.asyncApache Hadoopjavadoc
AMRMTokenIdentifierAMRMTokenIdentifier is the TokenIdentifier to be used by ApplicationMasters to authenticate to the ResourceManager.Classorg.apache.hadoop.yarn.securityApache Hadoopjavadoc
AMRMTokenSelectorClassorg.apache.hadoop.yarn.securityApache Hadoopjavadoc
ApplicationAccessTypeenum ApplicationAccessTypeApplication access types.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ApplicationAttemptIdApplicationAttemptId denotes the particular attempt of an ApplicationMaster for a given ApplicationId.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ApplicationAttemptNotFoundExceptionThis exception is thrown on (GetApplicationAttemptReportRequest)Classorg.apache.hadoop.yarn.exceptionsApache Hadoopjavadoc
ApplicationAttemptReportApplicationAttemptReport is a report of an application attempt.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ApplicationClassLoaderA URLClassLoader for application isolation.Classorg.apache.hadoop.utilApache Hadoopjavadoc
ApplicationClassLoaderThis type has been deprecated in favor of ApplicationClassLoader.Classorg.apache.hadoop.yarn.utilApache Hadoopjavadoc
ApplicationClientProtocolThe protocol between clients and the ResourceManager to submit/abort jobs and to get information on applications, cluster metrics,Interfaceorg.apache.hadoop.yarn.apiApache Hadoopjavadoc
ApplicationConstantsThis is the API for the applications comprising of constants that YARN sets up for the applications and the containers.Interfaceorg.apache.hadoop.yarn.apiApache Hadoopjavadoc
ApplicationHistoryProtocol The protocol between clients and the ApplicationHistoryServer to get the information of completed applications etc.Interfaceorg.apache.hadoop.yarn.apiApache Hadoopjavadoc
ApplicationIdApplicationId represents the globally unique identifier for an application.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ApplicationIdNotProvidedExceptionException to be thrown when Client submit an application without providing ApplicationId in ApplicationSubmissionContext.Classorg.apache.hadoop.yarn.exceptionsApache Hadoopjavadoc
ApplicationMasterAn ApplicationMaster for executing shell commands on a set of launched containers using the YARN framework.Classorg.apache.hadoop.yarn.applications.distributedshellApache Hadoopjavadoc
ApplicationMasterProtocolThe protocol between a live instance of ApplicationMaster and the ResourceManager.Interfaceorg.apache.hadoop.yarn.apiApache Hadoopjavadoc
ApplicationNotFoundExceptionThis exception is thrown on (GetApplicationReportRequest) APIClassorg.apache.hadoop.yarn.exceptionsApache Hadoopjavadoc
ApplicationReportApplicationReport is a report of an application.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ApplicationResourceUsageReportContains various scheduling metrics to be reported by UI and CLI.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ApplicationsRequestScopeenum ApplicationsRequestScopeEnumeration that controls the scope of applications fetchedClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
ApplicationSubmissionContextApplicationSubmissionContext represents all of the information needed by the ResourceManager to launchClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ArrayFileA dense file-based mapping from integers to values.Classorg.apache.hadoop.ioApache Hadoopjavadoc
ArrayListBackedIteratorThis class provides an implementation of ResetableIterator.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
ArrayListBackedIteratorThis class provides an implementation of ResetableIterator.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
ArrayPrimitiveWritableThis is a wrapper class.Classorg.apache.hadoop.ioApache Hadoopjavadoc

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ArrayWritableA Writable for arrays containing instances of a class.Classorg.apache.hadoop.ioApache Hadoopjavadoc
AsyncDispatcherDispatches Events in a separate thread.Classorg.apache.hadoop.yarn.eventApache Hadoopjavadoc
AvroFSInputAdapts an FSDataInputStream to Avro's SeekableInput interface.Classorg.apache.hadoop.fsApache Hadoopjavadoc
AvroReflectSerializationSerialization for Avro Reflect classes.Classorg.apache.hadoop.io.serializer.avroApache Hadoopjavadoc
AvroSerializationBase class for providing serialization to Avro types.Classorg.apache.hadoop.io.serializer.avroApache Hadoopjavadoc
AvroSpecificSerializationSerialization for Avro Specific classes.Classorg.apache.hadoop.io.serializer.avroApache Hadoopjavadoc
AzureExceptionThrown if there is a problem communicating with Azure Storage service.Classorg.apache.hadoop.fs.azureApache Hadoopjavadoc
AzureFileSystemInstrumentationA metrics source for the WASB file system to track all the metrics we care about for getting a clear picture of the performance/reliability/interactionClassorg.apache.hadoop.fs.azure.metricsApache Hadoopjavadoc
BadFencingConfigurationExceptionIndicates that the operator has specified an invalid configuration for fencing methods.Classorg.apache.hadoop.haApache Hadoopjavadoc
BaseClientToAMTokenSecretManagerA base SecretManager for AMs to extend and validate Client-RM tokens issued to clients by the RM using the underlying master-key shared by RM toClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc
BigDecimalSplitterClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
BinaryComparableInterface supported by WritableComparable types supporting ordering/permutation by a representative set of bytes.Classorg.apache.hadoop.ioApache Hadoopjavadoc
BinaryPartitionerPartition BinaryComparable keys using a configurable part of the bytes array returned by BinaryComparable.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
BinaryPartitionerPartition BinaryComparable keys using a configurable part of the bytes array returned by BinaryComparable.Classorg.apache.hadoop.mapreduce.lib.partitionApache Hadoopjavadoc
BinaryRecordInputClassorg.apache.hadoop.recordApache Hadoopjavadoc
BinaryRecordOutputClassorg.apache.hadoop.recordApache Hadoopjavadoc
BindFlagsCombinable Flags to use when creating a service entry.Interfaceorg.apache.hadoop.registry.client.apiApache Hadoopjavadoc
BindingInformationClassorg.apache.hadoop.registry.client.impl.zkApache Hadoopjavadoc
BlockCompressorStreamA CompressorStream which works with 'block-based' based compression algorithms, as opposed to Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
BlockDecompressorStreamA DecompressorStream which works with 'block-based' based compression algorithms, as opposed to Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
BlockLocationRepresents the network location of a block, information about the hosts that contain block replicas, and other block metadata (E.Classorg.apache.hadoop.fsApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.fs.BlockLocation
BlockStorageLocationWrapper for BlockLocation that also adds VolumeId volume location information for each replica.Classorg.apache.hadoop.fsApache Hadoopjavadoc
BloomFilter The Bloom filter is a data structure that was introduced in 1970 and that has been adopted by the networking research community in the past decade thanks to the bandwidth efficiencies that itClassorg.apache.hadoop.util.bloomApache Hadoopjavadoc
BloomMapFileThis class extends MapFile and provides very much the same functionality.Classorg.apache.hadoop.ioApache Hadoopjavadoc
BooleanSplitterClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc

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BooleanWritableA WritableComparable for booleans.Classorg.apache.hadoop.ioApache Hadoopjavadoc
BufferA byte sequence that is used as a Java native type for buffer.Classorg.apache.hadoop.recordApache Hadoopjavadoc
ByteBufferPoolInterfaceorg.apache.hadoop.ioApache Hadoopjavadoc
BytesWritableA byte sequence that is usable as a key or value.Classorg.apache.hadoop.ioApache Hadoopjavadoc
ByteWritableA WritableComparable for a single byte.Classorg.apache.hadoop.ioApache Hadoopjavadoc
BZip2CodecThis class provides output and input streams for bzip2 compression and decompression.Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
CachedDNSToSwitchMappingA cached implementation of DNSToSwitchMapping that takes an raw DNSToSwitchMapping and stores the resolved network location in Classorg.apache.hadoop.netApache Hadoopjavadoc
CacheFlagSpecifies semantics for CacheDirective operations.Classorg.apache.hadoop.fsApache Hadoopjavadoc
CancelDelegationTokenRequestInterfaceorg.apache.hadoop.mapreduce.v2.api.protocolrecordsApache Hadoopjavadoc
CanSetDropBehindInterfaceorg.apache.hadoop.fsApache Hadoopjavadoc
CanSetReadaheadInterfaceorg.apache.hadoop.fsApache Hadoopjavadoc
ChainMapperThe ChainMapper class allows to use multiple Mapper classes within a single The Mapper classes are invoked in a chained (or piped) fashion, the output ofClassorg.apache.hadoop.mapred.libApache Hadoopjavadoc
ChainMapperThe ChainMapper class allows to use multiple Mapper classes within a single The Mapper classes are invoked in a chained (or piped) fashion, the output ofClassorg.apache.hadoop.mapreduce.lib.chainApache Hadoopjavadoc
ChainReducerThe ChainReducer class allows to chain multiple Mapper classes after a Reducer within the Reducer task.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
ChainReducerThe ChainReducer class allows to chain multiple Mapper classes after a Reducer within the Reducer task.Classorg.apache.hadoop.mapreduce.lib.chainApache Hadoopjavadoc
CheckpointableContract representing to the framework that the task can be safely preempted and restarted between invocations of the user-defined function.Classorg.apache.hadoop.mapreduce.task.annotationApache Hadoopjavadoc
ChecksumExceptionThrown for checksum errors.Classorg.apache.hadoop.fsApache Hadoopjavadoc
ChecksumFileSystemAbstract Checksumed FileSystem.Classorg.apache.hadoop.fsApache Hadoopjavadoc
CLIClassorg.apache.hadoop.mapreduce.toolsApache Hadoopjavadoc
ClientClient for Distributed Shell application submission to YARN.Classorg.apache.hadoop.yarn.applications.distributedshellApache Hadoopjavadoc
ClientRMProxyClassorg.apache.hadoop.yarn.clientApache Hadoopjavadoc
ClientRMSecurityInfoClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc
ClientSCMProtocol The protocol between clients and the SharedCacheManager to claim and release resources in the shared cache.Interfaceorg.apache.hadoop.yarn.apiApache Hadoopjavadoc
ClientTimelineSecurityInfoClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc
ClientToAMTokenIdentifierClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc

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ClientToAMTokenSecretManagerA simple SecretManager for AMs to validate Client-RM tokens issued to clients by the RM using the underlying master-key shared by RM to the AMs onClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc
ClusterProvides a way to access information about the map/reduce cluster.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
ClusterMetricsStatus information on the current state of the Map-Reduce cluster.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
ClusterStatusStatus information on the current state of the Map-Reduce cluster.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
CodeBufferClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
CodecPoolA global compressor/decompressor pool used to save and reuse (possibly native) compression/decompression codecs.Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
CombineFileInputFormatAn abstract InputFormat that returns CombineFileSplit's in InputFormat.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
CombineFileInputFormatAn abstract InputFormat that returns CombineFileSplit's in InputFormat.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat
CombineFileRecordReaderA generic RecordReader that can hand out different recordReaders for each chunk in a CombineFileSplit.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
CombineFileRecordReaderA generic RecordReader that can hand out different recordReaders for each chunk in a CombineFileSplit.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.lib.input.CombineFileRecordReader
CombineFileRecordReaderWrapperA wrapper class for a record reader that handles a single file split.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
CombineFileRecordReaderWrapperA wrapper class for a record reader that handles a single file split.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
CombineFileSplitClassorg.apache.hadoop.mapred.libApache Hadoopjavadoc
CombineFileSplitA sub-collection of input files.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.lib.input.CombineFileSplit
CombineSequenceFileInputFormatInput format that is a CombineFileInputFormat-equivalent for SequenceFileInputFormat.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
CombineSequenceFileInputFormatInput format that is a CombineFileInputFormat-equivalent for SequenceFileInputFormat.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
CombineTextInputFormatInput format that is a CombineFileInputFormat-equivalent forSee Also:CombineFileInputFormatClassorg.apache.hadoop.mapred.libApache Hadoopjavadoc
CombineTextInputFormatInput format that is a CombineFileInputFormat-equivalent forSee Also:CombineFileInputFormatClassorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
CommonConfigurationKeysPublicThis class contains constants for configuration keys used in the common code.Classorg.apache.hadoop.fsApache Hadoopjavadoc
ComposableInputFormatRefinement of InputFormat requiring implementors to provide ComposableRecordReader instead of RecordReader.Interfaceorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
ComposableInputFormatRefinement of InputFormat requiring implementors to provide ComposableRecordReader instead of RecordReader.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
ComposableRecordReaderAdditional operations required of a RecordReader to participate in a join.Interfaceorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
ComposableRecordReaderAdditional operations required of a RecordReader to participate in a join.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
CompositeContextClassorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
CompositeInputFormatAn InputFormat capable of performing joins over a set of data sources sorted and partitioned the same way.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc

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CompositeInputFormatAn InputFormat capable of performing joins over a set of data sources sorted and partitioned the same way.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
CompositeInputSplitThis InputSplit contains a set of child InputSplits.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
CompositeInputSplitThis InputSplit contains a set of child InputSplits.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
CompositeRecordReaderA RecordReader that can effect joins of RecordReaders sharing a common key type and partitioning.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
CompositeRecordReaderA RecordReader that can effect joins of RecordReaders sharing a common key type and partitioning.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
CompositeServiceComposition of services.Classorg.apache.hadoop.serviceApache Hadoopjavadoc
CompressedWritableA base-class for Writables which store themselves compressed and lazily inflate on field access.Classorg.apache.hadoop.ioApache Hadoopjavadoc
CompressionCodecThis class encapsulates a streaming compression/decompression pair.Interfaceorg.apache.hadoop.io.compressApache Hadoopjavadoc
CompressionCodecFactoryA factory that will find the correct codec for a given filename.Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
CompressionInputStreamA compression input stream.Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
CompressionOutputStreamA compression output stream.Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
CompressorSpecification of a stream-based 'compressor' which can be plugged into a CompressionOutputStream to compress data.Interfaceorg.apache.hadoop.io.compressApache Hadoopjavadoc
CompressorStreamClassorg.apache.hadoop.io.compressApache Hadoopjavadoc
ConfigurableSomething that may be configured with a Configuration.Interfaceorg.apache.hadoop.confApache Hadoopjavadoc
ConfigurationProvides access to configuration parameters.Classorg.apache.hadoop.confApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.conf.Configuration
ConfiguredBase class for things that may be configured with a Configuration.Classorg.apache.hadoop.confApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.conf.Configured
ConnectTimeoutExceptionThrown by NetUtils.Classorg.apache.hadoop.netApache Hadoopjavadoc
ConstsClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
ContainerContainer represents an allocated resource in the cluster.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ContainerExitStatusContainer exit statuses indicating special exit circumstances.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ContainerIdContainerId represents a globally unique identifier for a Container in the cluster.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ContainerLaunchContextContainerLaunchContext represents all of the information needed by the NodeManager to launch a container.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ContainerLogAppenderA simple log4j-appender for container's logs.Classorg.apache.hadoop.yarnApache Hadoopjavadoc
ContainerManagementProtocolThe protocol between an ApplicationMaster and a NodeManager to start/stop containers and to get statusInterfaceorg.apache.hadoop.yarn.apiApache Hadoopjavadoc
ContainerManagerSecurityInfoClassorg.apache.hadoop.yarn.securityApache Hadoopjavadoc

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ContainerNotFoundExceptionThis exception is thrown on (GetContainerReportRequest)Classorg.apache.hadoop.yarn.exceptionsApache Hadoopjavadoc
ContainerReportContainerReport is a report of an container.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ContainerResourceIncreaseRequestClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ContainerRollingLogAppenderA simple log4j-appender for container's logs.Classorg.apache.hadoop.yarnApache Hadoopjavadoc
ContainerStateState of a Container.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ContainerStatusContainerStatus represents the current status of a It provides details such as:Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ContainerTokenIdentifierTokenIdentifier for a container.Classorg.apache.hadoop.yarn.securityApache Hadoopjavadoc
ContainerTokenSelectorClassorg.apache.hadoop.yarn.securityApache Hadoopjavadoc
ContentSummaryStore the summary of a content (a directory or a file).Classorg.apache.hadoop.fsApache Hadoopjavadoc
ControlledJobThis class encapsulates a MapReduce job and its dependency.Classorg.apache.hadoop.mapreduce.lib.jobcontrolApache Hadoopjavadoc
CounterA named counter that tracks the progress of a map/reduce job.Interfaceorg.apache.hadoop.mapreduceApache Hadoopjavadoc
CounterGroupA group of Counters that logically belong together.Interfaceorg.apache.hadoop.mapreduceApache Hadoopjavadoc
CounterGroupBaseThe common counter group interface.Interfaceorg.apache.hadoop.mapreduce.countersApache Hadoopjavadoc
CountersA set of named counters.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapred.Counters
CountersCounters holds per job/task counters, defined either by the Map-Reduce framework or applications.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
CountingBloomFilter A counting Bloom filter is an improvement to standard a Bloom filter as it allows dynamic additions and deletions of set membership information.Classorg.apache.hadoop.util.bloomApache Hadoopjavadoc
CreateFlagCreateFlag specifies the file create semantic.Classorg.apache.hadoop.fsApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.fs.CreateFlag
CredentialProviderA provider of credentials or password for Hadoop applications.Classorg.apache.hadoop.security.aliasApache Hadoopjavadoc
CredentialProviderFactoryA factory to create a list of CredentialProvider based on the path given in a Configuration.Classorg.apache.hadoop.security.aliasApache Hadoopjavadoc
CsvRecordInputClassorg.apache.hadoop.recordApache Hadoopjavadoc
CsvRecordOutputClassorg.apache.hadoop.recordApache Hadoopjavadoc
DataDrivenDBInputFormatA InputFormat that reads input data from an SQL table.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
DataDrivenDBRecordReaderA RecordReader that reads records from a SQL table, using data-driven WHERE clause splits.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
DataOutputOutputStreamOutputStream implementation that wraps a DataOutput.Classorg.apache.hadoop.ioApache Hadoopjavadoc
DateSplitterClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc

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DBConfigurationClassorg.apache.hadoop.mapred.lib.dbApache Hadoopjavadoc
DBConfigurationA container for configuration property names for jobs with DB input/output.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
DBInputFormatClassorg.apache.hadoop.mapred.lib.dbApache Hadoopjavadoc
DBInputFormatA InputFormat that reads input data from an SQL table.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
DBOutputFormatClassorg.apache.hadoop.mapred.lib.dbApache Hadoopjavadoc
DBOutputFormatA OutputFormat that sends the reduce output to a SQL table.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
DBRecordReaderA RecordReader that reads records from a SQL table.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
DBSplitterDBSplitter will generate DBInputSplits to use with DataDrivenDBInputFormat.Interfaceorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
DBWritableObjects that are read from/written to a database should implement DBWritable.Interfaceorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
DecompressorSpecification of a stream-based 'de-compressor' which can be plugged into a CompressionInputStream to compress data.Interfaceorg.apache.hadoop.io.compressApache Hadoopjavadoc
DecompressorStreamClassorg.apache.hadoop.io.compressApache Hadoopjavadoc
DefaultCodecClassorg.apache.hadoop.io.compressApache Hadoopjavadoc
DefaultMetricsSystemenum DefaultMetricsSystemThe default metrics system singletonClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
DefaultStringifierDefaultStringifier is the default implementation of the Stringifier interface which stringifies the objects using base64 encoding of theClassorg.apache.hadoop.ioApache Hadoopjavadoc
DelegationTokenAuthenticatedURLThe DelegationTokenAuthenticatedURL is a AuthenticatedURL sub-class with built-in Hadoop Delegation TokenClassorg.apache.hadoop.security.token.delegation.webApache Hadoopjavadoc
DelegationTokenAuthenticatorAuthenticator wrapper that enhances an Authenticator with Delegation Token support.Classorg.apache.hadoop.security.token.delegation.webApache Hadoopjavadoc
DirectDecompressionCodecThis class encapsulates a codec which can decompress direct bytebuffers.Interfaceorg.apache.hadoop.io.compressApache Hadoopjavadoc
DirectDecompressorSpecification of a direct ByteBuffer 'de-compressor'.Interfaceorg.apache.hadoop.io.compressApache Hadoopjavadoc
DispatcherEvent Dispatcher interface.Interfaceorg.apache.hadoop.yarn.eventApache Hadoopjavadoc
DistributedCacheDistribute application-specific large, read-only files efficiently.Classorg.apache.hadoop.filecacheApache Hadoopjavadoc
DNSToSwitchMappingAn interface that must be implemented to allow pluggable DNS-name/IP-address to RackID resolvers.Interfaceorg.apache.hadoop.netApache Hadoopjavadoc
DoubleValueSumClassorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
DoubleValueSumClassorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
DoubleWritableWritable for Double values.Classorg.apache.hadoop.ioApache Hadoopjavadoc
DSConstantsClassorg.apache.hadoop.yarn.applications.distributedshellApache Hadoopjavadoc

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DynamicBloomFilter A dynamic Bloom filter (DBF) makes use of a s * m bit matrix but each of the s rows is a standard Bloom filter.Classorg.apache.hadoop.util.bloomApache Hadoopjavadoc
ElasticByteBufferPoolThis is a simple ByteBufferPool which just creates ByteBuffers as needed.Classorg.apache.hadoop.ioApache Hadoopjavadoc
EndpointDescription of a single service/component endpoint.Classorg.apache.hadoop.registry.client.typesApache Hadoopjavadoc
EnumSetWritableA Writable wrapper for EnumSet.Classorg.apache.hadoop.ioApache Hadoopjavadoc
EventInterface defining events api.Interfaceorg.apache.hadoop.yarn.eventApache Hadoopjavadoc
EventCounterA log4J Appender that simply counts logging events in three levels: fatal, error and warn.Classorg.apache.hadoop.log.metricsApache Hadoopjavadoc
FailoverFailedExceptionException thrown to indicate service failover has failed.Classorg.apache.hadoop.haApache Hadoopjavadoc
FenceMethodA fencing method is a method by which one node can forcibly prevent another node from making continued progress.Interfaceorg.apache.hadoop.haApache Hadoopjavadoc
FieldSelectionHelperThis class implements a mapper/reducer class that can be used to perform field selections in a manner similar to unix cut.Classorg.apache.hadoop.mapreduce.lib.fieldselApache Hadoopjavadoc
FieldSelectionMapperThis class implements a mapper class that can be used to perform field selections in a manner similar to unix cut.Classorg.apache.hadoop.mapreduce.lib.fieldselApache Hadoopjavadoc
FieldSelectionMapReduceThis class implements a mapper/reducer class that can be used to perform field selections in a manner similar to unix cut.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
FieldSelectionReducerThis class implements a reducer class that can be used to perform field selections in a manner similar to unix cut.Classorg.apache.hadoop.mapreduce.lib.fieldselApache Hadoopjavadoc
FieldTypeInfoRepresents a type information for a field, which is made up of its ID (name) and its type (a TypeID object).Classorg.apache.hadoop.record.metaApache Hadoopjavadoc
FileAlreadyExistsExceptionUsed when target file already exists for any operation and is not configured to be overwritten.Classorg.apache.hadoop.fsApache Hadoopjavadoc
FileAlreadyExistsExceptionUsed when target file already exists for any operation and is not configured to be overwritten.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
FileChecksumAn abstract class representing file checksums for files.Classorg.apache.hadoop.fsApache Hadoopjavadoc
FileContextThe FileContext class provides an interface to the application writer for using the Hadoop file system.Classorg.apache.hadoop.fsApache Hadoopjavadoc
FileInputFormatA base class for file-based InputFormat.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
FileInputFormatA base class for file-based InputFormats.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.lib.input.FileInputFormat
FileInputFormatCounterenum FileInputFormatCounterEnum Constant SummaryClassorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
FileOutputCommitterAn OutputCommitter that commits files specified in job output directory i.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
FileOutputCommitterAn OutputCommitter that commits files specified in job output directory i.Classorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
FileOutputFormatA base class for OutputFormat.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
FileOutputFormatA base class for OutputFormats that read from FileSystems.Classorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.lib.output.FileOutputFormat
FileOutputFormatCounterenum FileOutputFormatCounterEnum Constant SummaryClassorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc

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FileSinkClassorg.apache.hadoop.metrics2.sinkApache Hadoopjavadoc
FileSplitA section of an input file.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
FileSplitA section of an input file.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
FileStatusInterface that represents the client side information for a file.Classorg.apache.hadoop.fsApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.fs.FileStatus
FileSystemAn abstract base class for a fairly generic filesystem.Classorg.apache.hadoop.fsApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.fs.FileSystem
FileUtilClassorg.apache.hadoop.fsApache Hadoopjavadoc
FilterFileSystemA FilterFileSystem contains some other file system, which it uses asClassorg.apache.hadoop.fsApache Hadoopjavadoc
FilterOutputFormatFilterOutputFormat is a convenience class that wraps OutputFormat.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
FilterOutputFormatFilterOutputFormat is a convenience class that wraps OutputFormat.Classorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
FinalApplicationStatusenum FinalApplicationStatusEnumeration of various final states of an Application.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
FinishApplicationMasterRequestThe finalization request sent by the ApplicationMaster to inform the ResourceManager about its completion.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
FinishApplicationMasterResponseThe response sent by the ResourceManager to a ApplicationMaster on it's completion.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
FixedLengthInputFormatFixedLengthInputFormat is an input format used to read input files which contain fixed length records.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
FixedLengthInputFormatFixedLengthInputFormat is an input format used to read input files which contain fixed length records.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
FloatSplitterClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
FloatWritableA WritableComparable for floats.Classorg.apache.hadoop.ioApache Hadoopjavadoc
FsActionFile system actions, e.Classorg.apache.hadoop.fs.permissionApache Hadoopjavadoc
FsConstantsFileSystem related constants.Interfaceorg.apache.hadoop.fsApache Hadoopjavadoc
FSDataInputStreamUtility that wraps a FSInputStream in a DataInputStream and buffers input through a BufferedInputStream.Classorg.apache.hadoop.fsApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.fs.FSDataInputStream
FSDataOutputStreamUtility that wraps a OutputStream in a DataOutputStream.Classorg.apache.hadoop.fsApache Hadoopjavadoc
FSErrorThrown for unexpected filesystem errors, presumed to reflect disk errors in the native filesystem.Classorg.apache.hadoop.fsApache Hadoopjavadoc
FsPermissionA class for file/directory permissions.Classorg.apache.hadoop.fs.permissionApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.fs.permission.FsPermission
FsServerDefaultsProvides server default configuration values to clients.Classorg.apache.hadoop.fsApache Hadoopjavadoc
FsStatusClassorg.apache.hadoop.fsApache Hadoopjavadoc
FTPExceptionA class to wrap a Throwable into a Runtime Exception.Classorg.apache.hadoop.fs.ftpApache Hadoopjavadoc

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FTPFileSystem A FileSystem backed by an FTP client provided by Apache Commons Net.Classorg.apache.hadoop.fs.ftpApache Hadoopjavadoc
GangliaContextContext for sending metrics to Ganglia.Classorg.apache.hadoop.metrics.gangliaApache Hadoopjavadoc
GenericWritableA wrapper for Writable instances.Classorg.apache.hadoop.ioApache Hadoopjavadoc
GetApplicationAttemptReportRequest The request sent by a client to the ResourceManager to get an ApplicationAttemptReport for an application attempt.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetApplicationAttemptReportResponse The response sent by the ResourceManager to a client requesting an application attempt report.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetApplicationAttemptsRequest The request from clients to get a list of application attempt reports of an application from the ResourceManager.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetApplicationAttemptsResponse The response sent by the ResourceManager to a client requesting a list of ApplicationAttemptReport for application attempts.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetApplicationReportRequestThe request sent by a client to the ResourceManager to get an ApplicationReport for an application.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetApplicationReportResponseThe response sent by the ResourceManager to a client requesting an application report.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetApplicationsRequestThe request from clients to get a report of Applications in the cluster from the ResourceManager.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetApplicationsResponseThe response sent by the ResourceManager to a client requesting an ApplicationReport for applications.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetClusterMetricsRequestThe request sent by clients to get cluster metrics from the Currently, this is empty.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetClusterMetricsResponseThe response sent by the ResourceManager to a client requesting cluster metrics.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetClusterNodeLabelsRequestClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetClusterNodeLabelsResponseClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetClusterNodesRequestThe request from clients to get a report of all nodes in the cluster from the ResourceManager.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetClusterNodesResponseThe response sent by the ResourceManager to a client requesting a NodeReport for all nodes.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetContainerReportRequest The request sent by a client to the ResourceManager to get an ContainerReport for a container.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetContainerReportResponse The response sent by the ResourceManager to a client requesting a container report.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetContainersRequest The request from clients to get a list of container reports, which belong to an application attempt from the ResourceManager.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetContainersResponse The response sent by the ResourceManager to a client requesting a list of ContainerReport for containers.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetContainerStatusesRequestThe request sent by the ApplicationMaster to the NodeManager to get ContainerStatus of requestedClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetContainerStatusesResponseThe response sent by the NodeManager to the ApplicationMaster when asked to obtain theClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetDelegationTokenRequestInterfaceorg.apache.hadoop.mapreduce.v2.api.protocolrecordsApache Hadoopjavadoc
GetDelegationTokenRequestThe request issued by the client to get a delegation token from the ResourceManager.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc

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GetDelegationTokenResponseResponse to a GetDelegationTokenRequest request from the client.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetNewApplicationRequestThe request sent by clients to get a new ApplicationId for submitting an application.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetNewApplicationResponseThe response sent by the ResourceManager to the client for a request to get a new ApplicationId for submitting applications.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetQueueInfoRequestThe request sent by clients to get queue information from the ResourceManager.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetQueueInfoResponseThe response sent by the ResourceManager to a client requesting information about queues in the system.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetQueueUserAclsInfoRequestThe request sent by clients to the ResourceManager to get queue acls for the current user.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GetQueueUserAclsInfoResponseThe response sent by the ResourceManager to clients seeking queue acls for the user.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
GlobFilterA filter for POSIX glob pattern with brace expansions.Classorg.apache.hadoop.fsApache Hadoopjavadoc
GlobFilterA glob pattern filter for metrics.Classorg.apache.hadoop.metrics2.filterApache Hadoopjavadoc
GraphiteSinkClassorg.apache.hadoop.metrics2.sinkApache Hadoopjavadoc
GroupMappingServiceProviderInterfaceorg.apache.hadoop.securityApache Hadoopjavadoc
GzipCodecThis class creates gzip compressors/decompressors.Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
HadoopIllegalArgumentExceptionIndicates that a method has been passed illegal or invalid argument.Classorg.apache.hadoopApache Hadoopjavadoc
HAServiceProtocolProtocol interface that provides High Availability related primitives to monitor and fail-over the service.Interfaceorg.apache.hadoop.haApache Hadoopjavadoc
HAServiceProtocolHelperHelper for making HAServiceProtocol RPC calls.Classorg.apache.hadoop.haApache Hadoopjavadoc
HAServiceProtocolPBInterfaceorg.apache.hadoop.ha.protocolPBApache Hadoopjavadoc
HAServiceTargetRepresents a target of the client side HA administration commands.Classorg.apache.hadoop.haApache Hadoopjavadoc
HashFunctionSee Also:The general behavior of a key being stored in a filter, The general behavior of a filterClassorg.apache.hadoop.util.bloomApache Hadoopjavadoc
HashPartitionerPartition keys by their Object.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
HashPartitionerPartition keys by their Object.Classorg.apache.hadoop.mapreduce.lib.partitionApache Hadoopjavadoc
HdfsVolumeIdHDFS-specific volume identifier which implements VolumeId.Classorg.apache.hadoop.fsApache Hadoopjavadoc
HealthCheckFailedExceptionException thrown to indicate that health check of a service failed.Classorg.apache.hadoop.haApache Hadoopjavadoc
HistoryFileManagerClassorg.apache.hadoop.mapreduce.v2.hsApache Hadoopjavadoc
HistoryStorageProvides an API to query jobs that have finished.Interfaceorg.apache.hadoop.mapreduce.v2.hsApache Hadoopjavadoc
IDA general identifier, which internally stores the id as an integer.Classorg.apache.hadoop.mapredApache Hadoopjavadoc

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IDA general identifier, which internally stores the id as an integer.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
IdentityMapperClassorg.apache.hadoop.mapred.libApache Hadoopjavadoc
IdentityReducerPerforms no reduction, writing all input values directly to the output.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
IdMappingServiceProviderInterfaceorg.apache.hadoop.securityApache Hadoopjavadoc
IndexInterface that acts as an iterator for deserializing maps.Classorg.apache.hadoop.recordApache Hadoopjavadoc
InnerJoinRecordReaderClassorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
InnerJoinRecordReaderClassorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
InputFormatInputFormat describes the input-specification for a The Map-Reduce framework relies on the InputFormat of theInterfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
InputFormatInputFormat describes the input-specification for a The Map-Reduce framework relies on the InputFormat of theClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
InputSamplerClassorg.apache.hadoop.mapred.libApache Hadoopjavadoc
InputSamplerUtility for collecting samples and writing a partition file for TotalOrderPartitioner.Classorg.apache.hadoop.mapreduce.lib.partitionApache Hadoopjavadoc
InputSplitInputSplit represents the data to be processed by an individual Mapper.Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
InputSplitInputSplit represents the data to be processed by an individual Mapper.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.InputSplit
InputSplitWithLocationInfoInterfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
IntegerSplitterClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
InterfaceAudienceAnnotation to inform users of a package, class or method's intended audience.Classorg.apache.hadoop.classificationApache Hadoopjavadoc
InterfaceStabilityAnnotation to inform users of how much to rely on a particular package, class or method not changing over time.Classorg.apache.hadoop.classificationApache Hadoopjavadoc
InternsClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
IntSumReducerClassorg.apache.hadoop.mapreduce.lib.reduceApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.lib.reduce.IntSumReducer
IntWritableA WritableComparable for ints.Classorg.apache.hadoop.ioApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.io.IntWritable
InvalidFileTypeExceptionUsed when file type differs from the desired file type.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
InvalidInputExceptionThis class wraps a list of problems with the input, so that the user can get a list of problems together instead of finding and fixing them one Classorg.apache.hadoop.mapredApache Hadoopjavadoc
InvalidInputExceptionThis class wraps a list of problems with the input, so that the user can get a list of problems together instead of finding and fixing them one Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
InvalidJobConfExceptionThis exception is thrown when jobconf misses some mendatory attributes or value of some attributes is invalid.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
InvalidPathExceptionPath string is invalid either because it has invalid characters or due to other file system specific reasons.Classorg.apache.hadoop.fsApache Hadoopjavadoc

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InvalidPathnameExceptionA path name was invalid.Classorg.apache.hadoop.registry.client.exceptionsApache Hadoopjavadoc
InvalidRecordExceptionRaised if an attempt to parse a record failed.Classorg.apache.hadoop.registry.client.exceptionsApache Hadoopjavadoc
InvalidStateTransitonExceptionClassorg.apache.hadoop.yarn.stateApache Hadoopjavadoc
InverseMapperA Mapper that swaps keys and values.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
InverseMapperA Mapper that swaps keys and values.Classorg.apache.hadoop.mapreduce.lib.mapApache Hadoopjavadoc
IOUtilsAn utility class for I/O related functionality.Classorg.apache.hadoop.ioApache Hadoopjavadoc
IPListInterfaceorg.apache.hadoop.utilApache Hadoopjavadoc
JavaSerialization An experimental Serialization for Java Serializable classes.Classorg.apache.hadoop.io.serializerApache Hadoopjavadoc
JavaSerializationComparator A RawComparator that uses a JavaSerialization Deserializer to deserialize objects that are then compared viaClassorg.apache.hadoop.io.serializerApache Hadoopjavadoc
JBooleanClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JBufferCode generator for "buffer" type.Classorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JByteCode generator for "byte" type.Classorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JDoubleClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JFieldA thin wrappper around record field.Classorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JFileContainer for the Hadoop Record DDL.Classorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JFloatClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JIntClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JLongClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JMapClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JobClassorg.apache.hadoop.mapred.jobcontrolApache Hadoopjavadoc
JobThe job submitter's view of the Job.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.Job
JobClientJobClient is the primary interface for the user-job to interact JobClient provides facilities to submit jobs, track their Classorg.apache.hadoop.mapredApache Hadoopjavadoc
JobConfA map/reduce job configuration.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
JobConfigurableThat what may be configured.Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
JobContextInterfaceorg.apache.hadoop.mapredApache Hadoopjavadoc

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JobContextInterfaceorg.apache.hadoop.mapreduceApache Hadoopjavadoc
JobControlClassorg.apache.hadoop.mapred.jobcontrolApache Hadoopjavadoc
JobControlThis class encapsulates a set of MapReduce jobs and its dependency.Classorg.apache.hadoop.mapreduce.lib.jobcontrolApache Hadoopjavadoc
JobCounterClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
JobIDJobID represents the immutable and unique identifier for the job.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
JobIDJobID represents the immutable and unique identifier for the job.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
JobPriorityUsed to describe the priority of the running job.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
JobPriorityUsed to describe the priority of the running job.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
JobQueueInfoClass that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
JobStatusDescribes the current status of a job.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
JobStatusDescribes the current status of a job.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
JoinRecordReaderBase class for Composite joins returning Tuples of arbitrary Writables.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
JoinRecordReaderBase class for Composite joins returning Tuples of arbitrary Writables.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
JRecordClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JStringClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JTypeAbstract Base class for all types supported by Hadoop Record I/O.Classorg.apache.hadoop.record.compilerApache Hadoopjavadoc
JVectorClassorg.apache.hadoop.record.compilerApache Hadoopjavadoc
KerberosDelegationTokenAuthenticatorThe KerberosDelegationTokenAuthenticator provides support for Kerberos SPNEGO authentication mechanism and support for Hadoop DelegationClassorg.apache.hadoop.security.token.delegation.webApache Hadoopjavadoc
KeyFieldBasedComparatorThis comparator implementation provides a subset of the features provided by the Unix/GNU Sort.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
KeyFieldBasedComparatorThis comparator implementation provides a subset of the features provided by the Unix/GNU Sort.Classorg.apache.hadoop.mapreduce.lib.partitionApache Hadoopjavadoc
KeyFieldBasedPartitionerDefines a way to partition keys based on certain key fields (also see KeyFieldBasedComparator.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
KeyFieldBasedPartitionerDefines a way to partition keys based on certain key fields (also see KeyFieldBasedComparator.Classorg.apache.hadoop.mapreduce.lib.partitionApache Hadoopjavadoc
KeyProviderA provider of secret key material for Hadoop applications.Classorg.apache.hadoop.crypto.keyApache Hadoopjavadoc
KeyProviderFactoryA factory to create a list of KeyProvider based on the path given in a Configuration.Classorg.apache.hadoop.crypto.keyApache Hadoopjavadoc
KeyValueLineRecordReaderThis class treats a line in the input as a key/value pair separated by a separator character.Classorg.apache.hadoop.mapredApache Hadoopjavadoc

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KeyValueLineRecordReaderThis class treats a line in the input as a key/value pair separated by a separator character.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
KeyValueTextInputFormatAn InputFormat for plain text files.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
KeyValueTextInputFormatAn InputFormat for plain text files.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
KillApplicationRequestThe request sent by the client to the ResourceManager to abort a submitted application.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
KillApplicationResponseThe response sent by the ResourceManager to the client aborting a submitted application.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
LazyOutputFormatA Convenience class that creates output lazily.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
LazyOutputFormatA Convenience class that creates output lazily.Classorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
LifecycleEventA serializable lifecycle event: the time a state transition occurred, and what state was entered.Classorg.apache.hadoop.serviceApache Hadoopjavadoc
LocalFileSystemClassorg.apache.hadoop.fsApache Hadoopjavadoc
LocalResourceLocalResource represents a local resource required to The NodeManager is responsible for localizing the resource Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
LocalResourceTypeenum LocalResourceTypeLocalResourceType specifies the typeClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
LocalResourceVisibilityenum LocalResourceVisibilityLocalResourceVisibility specifies the visibilityClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
LocatedFileStatusThis class defines a FileStatus that includes a file's block locations.Classorg.apache.hadoop.fsApache Hadoopjavadoc
LogAggregationContextLogAggregationContext represents all of the information needed by the NodeManager to handleClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
LoggingStateChangeListenerClassorg.apache.hadoop.serviceApache Hadoopjavadoc
LogsCLIClassorg.apache.hadoop.yarn.client.cliApache Hadoopjavadoc
LongSumReducerA Reducer that sums long values.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
LongSumReducerClassorg.apache.hadoop.mapreduce.lib.reduceApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer
LongValueMaxThis class implements a value aggregator that maintain the maximum of a sequence of long values.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
LongValueMaxThis class implements a value aggregator that maintain the maximum of a sequence of long values.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
LongValueMinThis class implements a value aggregator that maintain the minimum of a sequence of long values.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
LongValueMinThis class implements a value aggregator that maintain the minimum of a sequence of long values.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
LongValueSumThis class implements a value aggregator that sums up a sequence of long values.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
LongValueSumThis class implements a value aggregator that sums up a sequence of long values.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
LongWritableA WritableComparable for longs.Classorg.apache.hadoop.ioApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.io.LongWritable

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MapContextThe context that is given to the Mapper.Interfaceorg.apache.hadoop.mapreduceApache Hadoopjavadoc
MapFileA file-based map from keys to values.Classorg.apache.hadoop.ioApache Hadoopjavadoc
MapFileOutputFormatAn OutputFormat that writes MapFiles.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
MapFileOutputFormatClassorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
MapperMaps input key/value pairs to a set of intermediate key/value pairs.Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapred.Mapper
MapperMaps input key/value pairs to a set of intermediate key/value pairs.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.Mapper
MapReduceBaseBase class for Mapper and Reducer implementations.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
MapRunnableExpert: Generic interface for Mappers.Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
MapRunnerDefault MapRunnable implementation.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
MapTypeIDClassorg.apache.hadoop.record.metaApache Hadoopjavadoc
MapWritableClassorg.apache.hadoop.ioApache Hadoopjavadoc
MarkableIteratorMarkableIterator is a wrapper iterator class that implements the MarkableIteratorInterface.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
MBeansThis util class provides a method to register an MBean using our standard naming convention as described in the docClassorg.apache.hadoop.metrics2.utilApache Hadoopjavadoc
MD5HashA Writable for MD5 hash values.Classorg.apache.hadoop.ioApache Hadoopjavadoc
MetaBlockAlreadyExistsException - Meta Block with the same name already exists.Classorg.apache.hadoop.io.file.tfileApache Hadoopjavadoc
MetaBlockDoesNotExistException - No such Meta Block with the given name.Classorg.apache.hadoop.io.file.tfileApache Hadoopjavadoc
MetricAnnotation interface for a single metricOptional Element SummaryClassorg.apache.hadoop.metrics2.annotationApache Hadoopjavadoc
MetricsAnnotation interface for a group of metricsRequired Element SummaryClassorg.apache.hadoop.metrics2.annotationApache Hadoopjavadoc
MetricsCacheA metrics cache for sinks that don't support sparse updates.Classorg.apache.hadoop.metrics2.utilApache Hadoopjavadoc
MetricsCollectorInterfaceorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsExceptionA general metrics exception wrapperSee Also:Serialized FormClassorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsFilterClassorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsInfoInterfaceorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsPluginInterfaceorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsRecordInterfaceorg.apache.hadoop.metrics2Apache Hadoopjavadoc

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MetricsRecordBuilderClassorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsRecordImplAn implementation of MetricsRecord.Classorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
MetricsRegistryAn optional metrics registry class for creating and maintaining a collection of MetricsMutables, making writing metrics source easier.Classorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MetricsSinkThe metrics sink interface.Interfaceorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsSourceInterfaceorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsSystemClassorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsSystemMXBeanInterfaceorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsTagImmutable tag for metrics (for grouping on host/queue/username etc.Classorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricsVisitorInterfaceorg.apache.hadoop.metrics2Apache Hadoopjavadoc
MetricValueA Number that is either an absolute or an incremental amount.Classorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
MigrationTool This class is a tool for migrating data from an older to a newer version of an S3 filesystem.Classorg.apache.hadoop.fs.s3Apache Hadoopjavadoc
MoveApplicationAcrossQueuesRequestThe request sent by the client to the ResourceManager to move a submitted application to a different queue.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
MoveApplicationAcrossQueuesResponse The response sent by the ResourceManager to the client moving a submitted application to a different queue.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
MultiFileInputFormatAn abstract InputFormat that returns MultiFileSplit's in getSplits(JobConf, int) method.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
MultiFileSplitA sub-collection of input files.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
MultiFilterRecordReaderBase class for Composite join returning values derived from multiple sources, but generally not tuples.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
MultiFilterRecordReaderBase class for Composite join returning values derived from multiple sources, but generally not tuples.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
MultipleArcTransitionHook for Transition.Interfaceorg.apache.hadoop.yarn.stateApache Hadoopjavadoc
MultipleInputsThis class supports MapReduce jobs that have multiple input paths with a different InputFormat and Mapper for each pathClassorg.apache.hadoop.mapred.libApache Hadoopjavadoc
MultipleInputsThis class supports MapReduce jobs that have multiple input paths with a different InputFormat and Mapper for each pathClassorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
MultipleIOExceptionEncapsulate a list of IOException into an IOExceptionSee Also:Serialized FormClassorg.apache.hadoop.ioApache Hadoopjavadoc
MultipleOutputFormatThis abstract class extends the FileOutputFormat, allowing to write the output data to different output files.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
MultipleOutputsThe MultipleOutputs class simplifies writting to additional outputs other than the job default output via the OutputCollector passed toClassorg.apache.hadoop.mapred.libApache Hadoopjavadoc
MultipleOutputsThe MultipleOutputs class simplifies writing output data to multiple outputsClassorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
MultipleSequenceFileOutputFormatThis class extends the MultipleOutputFormat, allowing to write the output data to different output files in sequence file output format.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc

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MultipleTextOutputFormatThis class extends the MultipleOutputFormat, allowing to write the output data to different output files in Text output format.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
MultithreadedMapperMultithreaded implementation for @link org.Classorg.apache.hadoop.mapreduce.lib.mapApache Hadoopjavadoc
MultithreadedMapRunnerMultithreaded implementation for MapRunnable.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
MutableCounterClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableCounterIntClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableCounterLongClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableGaugeClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableGaugeIntClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableGaugeLongClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableMetricClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableQuantilesWatches a stream of long values, maintaining online estimates of specific quantiles with provably low error bounds.Classorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableRateClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableRatesClassorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MutableStatA mutable metric with stats.Classorg.apache.hadoop.metrics2.libApache Hadoopjavadoc
MySQLDataDrivenDBRecordReaderClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
MySQLDBRecordReaderA RecordReader that reads records from a MySQL table.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
NativeAzureFileSystemA FileSystem for reading and writing files stored on Windows Azure.Classorg.apache.hadoop.fs.azureApache Hadoopjavadoc
NativeS3FileSystemA FileSystem for reading and writing files stored on Unlike S3FileSystem this implementationClassorg.apache.hadoop.fs.s3nativeApache Hadoopjavadoc
NLineInputFormatNLineInputFormat which splits N lines of input as one split.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
NLineInputFormatNLineInputFormat which splits N lines of input as one split.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
NMClientClassorg.apache.hadoop.yarn.client.apiApache Hadoopjavadoc
NMClientAsyncNMClientAsync handles communication with all the NodeManagers and provides asynchronous updates on getting responses from them.Classorg.apache.hadoop.yarn.client.api.asyncApache Hadoopjavadoc
NMProxyClassorg.apache.hadoop.yarn.clientApache Hadoopjavadoc
NMTokenThe NMToken is used for authenticating communication with It is issued by ResourceMananger when ApplicationMasterClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
NMTokenCacheNMTokenCache manages NMTokens required for an Application Master communicating with individual NodeManagers.Classorg.apache.hadoop.yarn.client.apiApache Hadoopjavadoc

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NMTokenIdentifierClassorg.apache.hadoop.yarn.securityApache Hadoopjavadoc
NoChildrenForEphemeralsExceptionThis is a manifestation of the Zookeeper restrictions about what nodes may act as parents.Classorg.apache.hadoop.registry.client.exceptionsApache Hadoopjavadoc
NodeIdNodeId is the unique identifier for a node.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
NodeReportNodeReport is a summary of runtime information of a node It includes details such as:Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
NodeStateClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
NoEmitMetricsContextA MetricsContext that does not emit data, but, unlike NullContextWithUpdate, does save it for retrieval with getAllRecords().Classorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
NoRecordExceptionRaised if there is no ServiceRecord resolved at the end of the specified path.Classorg.apache.hadoop.registry.client.exceptionsApache Hadoopjavadoc
NotInMountpointExceptionNotInMountpointException extends the UnsupportedOperationException.Classorg.apache.hadoop.fs.viewfsApache Hadoopjavadoc
NullContextNull metrics context: a metrics context which does nothing.Classorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
NullContextWithUpdateThreadA null context which has a thread calling periodically when monitoring is started.Classorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
NullOutputFormatConsume all outputs and put them in /dev/null.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
NullOutputFormatConsume all outputs and put them in /dev/null.Classorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
NullWritableSingleton Writable with no data.Classorg.apache.hadoop.ioApache Hadoopjavadoc
ObjectWritableA polymorphic Writable that writes an instance with it's class name.Classorg.apache.hadoop.ioApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.io.ObjectWritable
OptionsThis class contains options related to file system operations.Classorg.apache.hadoop.fsApache Hadoopjavadoc
OracleDataDrivenDBInputFormatA InputFormat that reads input data from an SQL table in an Oracle db.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
OracleDataDrivenDBRecordReaderClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
OracleDateSplitter Make use of logic from DateSplitter, since this just needs to use some Oracle-specific functions on the formatting end when generatingClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
OracleDBRecordReaderA RecordReader that reads records from an Oracle SQL table.Classorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
OuterJoinRecordReaderClassorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
OuterJoinRecordReaderClassorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
OutputCollectorCollects the pairs output by Mappers OutputCollector is the generalization of the facility Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
OutputCommitterOutputCommitter describes the commit of task output for a The Map-Reduce framework relies on the OutputCommitter of Classorg.apache.hadoop.mapredApache Hadoopjavadoc
OutputCommitterOutputCommitter describes the commit of task output for a The Map-Reduce framework relies on the OutputCommitter of Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
OutputFormatOutputFormat describes the output-specification for a The Map-Reduce framework relies on the OutputFormat of theInterfaceorg.apache.hadoop.mapredApache Hadoopjavadoc

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OutputFormatOutputFormat describes the output-specification for a The Map-Reduce framework relies on the OutputFormat of theClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
OutputLogFilterThis class filters log files from directory given It doesnt accept paths having _logs.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
OutputRecordRepresents a record of metric data to be sent to a metrics system.Classorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
OverrideRecordReaderPrefer the "rightmost" data source for this key.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
OverrideRecordReaderPrefer the "rightmost" data source for this key.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
ParentNotDirectoryExceptionIndicates that the parent of specified Path is not a directorySee Also:Serialized FormClassorg.apache.hadoop.fsApache Hadoopjavadoc
ParseExceptionThis exception is thrown when parse errors are encountered.Classorg.apache.hadoop.record.compiler.generatedApache Hadoopjavadoc
ParserVery simple shift-reduce parser for join expressions.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
ParserVery simple shift-reduce parser for join expressions.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
PartialFileOutputCommitterAn OutputCommitter that commits files specified in job output directory i.Classorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
PartialOutputCommitterInterface for an OutputCommitter implementing partial commit of task output, as during preemption.Interfaceorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
PartitionerPartitions the key space.Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
PartitionerPartitions the key space.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
PathNames a file or directory in a FileSystem.Classorg.apache.hadoop.fsApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.fs.Path
PathFilterInterfaceorg.apache.hadoop.fsApache Hadoopjavadoc
PositionedReadableStream that permits positional reading.Interfaceorg.apache.hadoop.fsApache Hadoopjavadoc
PreemptionContainerSpecific container requested back by the ResourceManager.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
PreemptionContractDescription of resources requested back by the ResourceManager.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
PreemptionMessageA PreemptionMessage is part of the RM-AM protocol, and it is used by the RM to specify resources that the RM wants to reclaim from thisClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
PreemptionResourceRequestDescription of resources requested back by the cluster.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
PriorityClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ProgressableA facility for reporting progress.Interfaceorg.apache.hadoop.utilApache Hadoopjavadoc
ProtocolTypesInterfaceorg.apache.hadoop.registry.client.typesApache Hadoopjavadoc
PseudoDelegationTokenAuthenticatorThe PseudoDelegationTokenAuthenticator provides support for Hadoop's pseudo authentication mechanism that acceptsClassorg.apache.hadoop.security.token.delegation.webApache Hadoopjavadoc
PureJavaCrc32A pure-java implementation of the CRC32 checksum that uses the same polynomial as the built-in native CRC32.Classorg.apache.hadoop.utilApache Hadoopjavadoc

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PureJavaCrc32CA pure-java implementation of the CRC32 checksum that uses the CRC32-C polynomial, the same polynomial used by iSCSIClassorg.apache.hadoop.utilApache Hadoopjavadoc
QueueACLQueueACL enumerates the various ACLs for queues.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
QueueAclsInfoClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
QueueInfoClass that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
QueueInfoQueueInfo is a report of the runtime information of the queue.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
QueueStateEnum representing queue stateEnum Constant SummaryClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
QueueState A queue is in one of: RUNNING - normal state.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
QueueUserACLInfoQueueUserACLInfo provides information QueueACL forApplicationClientProtocol.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
RawComparableInterface for objects that can be compared through RawComparator.Interfaceorg.apache.hadoop.io.file.tfileApache Hadoopjavadoc
RawComparator A Comparator that operates directly on byte representations ofSee Also:DeserializerComparatorInterfaceorg.apache.hadoop.ioApache Hadoopjavadoc
RawLocalFileSystemClassorg.apache.hadoop.fsApache Hadoopjavadoc
RccClassorg.apache.hadoop.record.compiler.generatedApache Hadoopjavadoc
RccConstantsInterfaceorg.apache.hadoop.record.compiler.generatedApache Hadoopjavadoc
RccTaskHadoop record compiler ant Task This task takes the given record definition files and compiles them intoClassorg.apache.hadoop.record.compiler.antApache Hadoopjavadoc
RccTokenManagerClassorg.apache.hadoop.record.compiler.generatedApache Hadoopjavadoc
ReadOptionOptions that can be used when reading from a FileSystem.Classorg.apache.hadoop.fsApache Hadoopjavadoc
ReconfigurationTaskStatusClassorg.apache.hadoop.confApache Hadoopjavadoc
RecordAbstract class that is extended by generated classes.Classorg.apache.hadoop.recordApache Hadoopjavadoc
RecordComparatorClassorg.apache.hadoop.recordApache Hadoopjavadoc
RecordInputInterface that all the Deserializers have to implement.Interfaceorg.apache.hadoop.recordApache Hadoopjavadoc
RecordOutputInterface that all the serializers have to implement.Interfaceorg.apache.hadoop.recordApache Hadoopjavadoc
RecordReaderRecordReader reads pairs from an RecordReader, typically, converts the byte-oriented view of Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
RecordReaderClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.RecordReader
RecordTypeInfoA record's Type Information object which can read/write itself.Classorg.apache.hadoop.record.metaApache Hadoopjavadoc
RecordWriterRecordWriter writes the output pairs RecordWriter implementations write the job outputs to theInterfaceorg.apache.hadoop.mapredApache Hadoopjavadoc

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RecordWriterRecordWriter writes the output pairs RecordWriter implementations write the job outputs to theClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
ReduceContextThe context passed to the Reducer.Interfaceorg.apache.hadoop.mapreduceApache Hadoopjavadoc
ReducerReduces a set of intermediate values which share a key to a smaller set of The number of Reducers for the job is set by the user via Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
ReducerReduces a set of intermediate values which share a key to a smaller set of Reducer implementations Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.Reducer
ReflectionUtilsClassorg.apache.hadoop.utilApache Hadoopjavadoc
RegexFilterClassorg.apache.hadoop.metrics2.filterApache Hadoopjavadoc
RegexMapperA Mapper that extracts text matching a regular expression.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
RegexMapperA Mapper that extracts text matching a regular expression.Classorg.apache.hadoop.mapreduce.lib.mapApache Hadoopjavadoc
RegisterApplicationMasterRequestThe request sent by the ApplicationMaster to ResourceManager The registration includes details such as:Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
RegisterApplicationMasterResponseThe response sent by the ResourceManager to a new ApplicationMaster on registration.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
RegistryBindingSourceInterfaceorg.apache.hadoop.registry.client.impl.zkApache Hadoopjavadoc
RegistryConstantsInterfaceorg.apache.hadoop.registry.client.apiApache Hadoopjavadoc
RegistryIOExceptionBase exception for registry operations.Classorg.apache.hadoop.registry.client.exceptionsApache Hadoopjavadoc
RegistryOperationsInterfaceorg.apache.hadoop.registry.client.apiApache Hadoopjavadoc
RegistryOperationsClientThis is the client service for applications to work with the registry.Classorg.apache.hadoop.registry.client.implApache Hadoopjavadoc
RegistryOperationsServiceThe Registry operations service.Classorg.apache.hadoop.registry.client.impl.zkApache Hadoopjavadoc
RegistryPathStatusOutput of a RegistryOperations.Classorg.apache.hadoop.registry.client.typesApache Hadoopjavadoc
RegistryTypeUtilsClassorg.apache.hadoop.registry.client.bindingApache Hadoopjavadoc
RegistryUtilsUtility methods for working with a registry.Classorg.apache.hadoop.registry.client.bindingApache Hadoopjavadoc
ReleaseSharedCacheResourceRequestThe request from clients to release a resource in the shared cache.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
ReleaseSharedCacheResourceResponse The response to clients from the SharedCacheManager when releasing a resource in the shared cache.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
RemoveSchemeDefines the different remove scheme for retouched Bloom filters.Interfaceorg.apache.hadoop.util.bloomApache Hadoopjavadoc
RenewDelegationTokenRequestThe request issued by the client to renew a delegation token from the ResourceManager.Interfaceorg.apache.hadoop.mapreduce.v2.api.protocolrecordsApache Hadoopjavadoc
RenewDelegationTokenResponseThe response to a renewDelegationToken call to the ResourceManager.Interfaceorg.apache.hadoop.mapreduce.v2.api.protocolrecordsApache Hadoopjavadoc
ReporterA facility for Map-Reduce applications to report progress and update counters, status information etc.Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc

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ReservationDefinitionReservationDefinition captures the set of resource and time constraints the user cares about regarding a reservation.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ReservationDeleteRequestReservationDeleteRequest captures the set of requirements the user has to delete an existing reservation.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
ReservationDeleteResponseReservationDeleteResponse contains the answer of the admission control system in the ResourceManager to a reservation deleteClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
ReservationId ReservationId represents the globally unique identifier for The globally unique nature of the identifier is achieved by using theClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ReservationRequestReservationRequest represents the request made by an application to the ResourceManager to reserve Resources.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ReservationRequestInterpreterenum ReservationRequestInterpreterEnumeration of various types of dependencies among multipleClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ReservationRequestsReservationRequests captures the set of resource and constraints the user cares about regarding a reservation.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ReservationSubmissionRequestReservationSubmissionRequest captures the set of requirements the user has to create a reservation.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
ReservationSubmissionResponseReservationSubmissionResponse contains the answer of the admission control system in the ResourceManager to a reservation createClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
ReservationUpdateRequestReservationUpdateRequest captures the set of requirements the user has to update an existing reservation.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
ReservationUpdateResponseReservationUpdateResponse contains the answer of the admission control system in the ResourceManager to a reservation updateClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
ResetableIteratorThis defines an interface to a stateful Iterator that can replay elements added to it directly.Interfaceorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
ResetableIteratorThis defines an interface to a stateful Iterator that can replay elements added to it directly.Interfaceorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
ResourceResource models a set of computer resources in the Currently it models both memory and CPU.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ResourceBlacklistRequestResourceBlacklistRequest encapsulates the list of resource-names which should be added or removed from the blacklist of resources Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ResourceCalculatorProcessTreeInterface class to obtain process resource usage NOTE: This class should not be used by external users, but only by externalClassorg.apache.hadoop.yarn.utilApache Hadoopjavadoc
ResourceOptionClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
ResourceRequestResourceRequest represents the request made by an application to the ResourceManagerClassorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
RetouchedBloomFilter It allows the removal of selected false positives at the cost of introducing random false negatives, and with the benefit of eliminating some random falseClassorg.apache.hadoop.util.bloomApache Hadoopjavadoc
RMDelegationTokenIdentifierClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc
RMDelegationTokenSelectorClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc
RMProxyClassorg.apache.hadoop.yarn.clientApache Hadoopjavadoc
RunningJobRunningJob is the user-interface to query for details on a running Map-Reduce job.Interfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
S3ExceptionThrown if there is a problem communicating with Amazon S3.Classorg.apache.hadoop.fs.s3Apache Hadoopjavadoc
S3FileSystemA block-based FileSystem backed bySee Also:NativeS3FileSystemClassorg.apache.hadoop.fs.s3Apache Hadoopjavadoc

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S3FileSystemExceptionThrown when there is a fatal exception while using S3FileSystem.Classorg.apache.hadoop.fs.s3Apache Hadoopjavadoc
SchedulerSecurityInfoClassorg.apache.hadoop.yarn.securityApache Hadoopjavadoc
ScriptBasedMappingThis class implements the DNSToSwitchMapping interface using a script configured via theClassorg.apache.hadoop.netApache Hadoopjavadoc
SeekableStream that permits seeking.Interfaceorg.apache.hadoop.fsApache Hadoopjavadoc
SequenceFileSequenceFiles are flat files consisting of binary key/value SequenceFile provides SequenceFile.Classorg.apache.hadoop.ioApache Hadoopjavadoc
SequenceFileAsBinaryInputFormatClassorg.apache.hadoop.mapredApache Hadoopjavadoc
SequenceFileAsBinaryInputFormatClassorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
SequenceFileAsBinaryOutputFormatAn OutputFormat that writes keys, values to SequenceFiles in binary(raw) formatClassorg.apache.hadoop.mapredApache Hadoopjavadoc
SequenceFileAsBinaryOutputFormatAn OutputFormat that writes keys, values to SequenceFiles in binary(raw) formatClassorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
SequenceFileAsTextInputFormatThis class is similar to SequenceFileInputFormat, except it generates SequenceFileAsTextRecordReader Classorg.apache.hadoop.mapredApache Hadoopjavadoc
SequenceFileAsTextInputFormatThis class is similar to SequenceFileInputFormat, except it generates SequenceFileAsTextRecordReader which converts the input keys and valuesClassorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
SequenceFileAsTextRecordReaderThis class converts the input keys and values to their String forms by calling toString() method.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
SequenceFileAsTextRecordReaderThis class converts the input keys and values to their String forms by calling toString() method.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
SequenceFileInputFilterA class that allows a map/red job to work on a sample of sequence files.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
SequenceFileInputFilterA class that allows a map/red job to work on a sample of sequence files.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
SequenceFileInputFormatAn InputFormat for SequenceFiles.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
SequenceFileInputFormatAn InputFormat for SequenceFiles.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
SequenceFileOutputFormatAn OutputFormat that writes SequenceFiles.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
SequenceFileOutputFormatAn OutputFormat that writes SequenceFiles.Classorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
SequenceFileRecordReaderAn RecordReader for SequenceFiles.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
SequenceFileRecordReaderAn RecordReader for SequenceFiles.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
ServerProxyClassorg.apache.hadoop.yarn.clientApache Hadoopjavadoc
ServersClassorg.apache.hadoop.metrics2.utilApache Hadoopjavadoc
ServiceInterfaceorg.apache.hadoop.serviceApache Hadoopjavadoc
ServiceFailedExceptionException thrown to indicate that an operation performed to modify the state of a service or application failed.Classorg.apache.hadoop.haApache Hadoopjavadoc

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ServiceOperationsThis class contains a set of methods to work with services, especially to walk them through their lifecycle.Classorg.apache.hadoop.serviceApache Hadoopjavadoc
ServiceRecordJSON-marshallable description of a single component.Classorg.apache.hadoop.registry.client.typesApache Hadoopjavadoc
ServiceStateChangeListenerInterface to notify state changes of a service.Interfaceorg.apache.hadoop.serviceApache Hadoopjavadoc
ServiceStateExceptionException that is raised on state change operations.Classorg.apache.hadoop.serviceApache Hadoopjavadoc
ServiceStateModelClassorg.apache.hadoop.serviceApache Hadoopjavadoc
SetFileA file-based set of keys.Classorg.apache.hadoop.ioApache Hadoopjavadoc
SharedCacheChecksumInterfaceorg.apache.hadoop.yarn.sharedcacheApache Hadoopjavadoc
SharedCacheChecksumFactoryClassorg.apache.hadoop.yarn.sharedcacheApache Hadoopjavadoc
SharedCacheClientThis is the client for YARN's shared cache.Classorg.apache.hadoop.yarn.client.apiApache Hadoopjavadoc
ShortWritableA WritableComparable for shorts.Classorg.apache.hadoop.ioApache Hadoopjavadoc
SimpleCharStreamAn implementation of interface CharStream, where the stream is assumed to contain only ASCII characters (without unicode processing).Classorg.apache.hadoop.record.compiler.generatedApache Hadoopjavadoc
SingleArcTransitionHook for Transition.Interfaceorg.apache.hadoop.yarn.stateApache Hadoopjavadoc
SkipBadRecordsUtility class for skip bad records functionality.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
SocksSocketFactoryClassorg.apache.hadoop.netApache Hadoopjavadoc
SortedMapWritableA Writable SortedMap.Classorg.apache.hadoop.ioApache Hadoopjavadoc
SpanReceiverInfoClassorg.apache.hadoop.tracingApache Hadoopjavadoc
SpanReceiverInfoBuilderClassorg.apache.hadoop.tracingApache Hadoopjavadoc
SplitCompressionInputStreamAn InputStream covering a range of compressed data.Classorg.apache.hadoop.io.compressApache Hadoopjavadoc
SplitLocationInfoClassorg.apache.hadoop.mapredApache Hadoopjavadoc
SplittableCompressionCodecThis interface is meant to be implemented by those compression codecs which are capable to compress / de-compress a stream starting at anyInterfaceorg.apache.hadoop.io.compressApache Hadoopjavadoc
StandardSocketFactoryClassorg.apache.hadoop.netApache Hadoopjavadoc
StartContainerRequestThe request sent by the ApplicationMaster to the NodeManager to start a container.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
StartContainersRequest The request which contains a list of StartContainerRequest sent by the ApplicationMaster to the NodeManager toClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
StartContainersResponse The response sent by the NodeManager to the ApplicationMaster when asked to start an allocatedClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
StateMachineInterfaceorg.apache.hadoop.yarn.stateApache Hadoopjavadoc

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StateMachineFactoryState machine topology.Classorg.apache.hadoop.yarn.stateApache Hadoopjavadoc
StopContainersRequestThe request sent by the ApplicationMaster to the NodeManager to stop containers.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
StopContainersResponse The response sent by the NodeManager to the ApplicationMaster when asked to stop allocatedClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
StorageTypeDefines the types of supported storage media.Classorg.apache.hadoop.fsApache Hadoopjavadoc
StreamBackedIteratorThis class provides an implementation of ResetableIterator.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
StreamBackedIteratorThis class provides an implementation of ResetableIterator.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
StrictPreemptionContractEnumeration of particular allocations to be reclaimed.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
StringifierStringifier interface offers two methods to convert an object to a string representation and restore the object given its Interfaceorg.apache.hadoop.ioApache Hadoopjavadoc
StringInternerProvides equivalent behavior to String.Classorg.apache.hadoop.utilApache Hadoopjavadoc
StringValueMaxThis class implements a value aggregator that maintain the biggest of a sequence of strings.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
StringValueMaxThis class implements a value aggregator that maintain the biggest of a sequence of strings.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
StringValueMinThis class implements a value aggregator that maintain the smallest of a sequence of strings.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
StringValueMinThis class implements a value aggregator that maintain the smallest of a sequence of strings.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
StructTypeIDClassorg.apache.hadoop.record.metaApache Hadoopjavadoc
SubmitApplicationRequestThe request sent by a client to submit an application to the The request, via ApplicationSubmissionContext, containsClassorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
SubmitApplicationResponseThe response sent by the ResourceManager to a client on application submission.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
SubmitterThe main entry point and job submitter.Classorg.apache.hadoop.mapred.pipesApache Hadoopjavadoc
SyncableThis interface for flush/sync operation.Interfaceorg.apache.hadoop.fsApache Hadoopjavadoc
SystemClock clock in milliseconds.Classorg.apache.hadoop.yarn.utilApache Hadoopjavadoc
TableMapping Simple DNSToSwitchMapping implementation that reads a 2 column text file.Classorg.apache.hadoop.netApache Hadoopjavadoc
TaskAttemptContextInterfaceorg.apache.hadoop.mapredApache Hadoopjavadoc
TaskAttemptContextThe context for task attempts.Interfaceorg.apache.hadoop.mapreduceApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.TaskAttemptContext
TaskAttemptIDTaskAttemptID represents the immutable and unique identifier for a task attempt.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
TaskAttemptIDTaskAttemptID represents the immutable and unique identifier for a task attempt.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
TaskCompletionEventClassorg.apache.hadoop.mapredApache Hadoopjavadoc

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TaskCompletionEventClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
TaskCounterClassorg.apache.hadoop.mapreduceApache Hadoopjavadoc
TaskIDTaskID represents the immutable and unique identifier for a Map or Reduce Task.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
TaskIDTaskID represents the immutable and unique identifier for a Map or Reduce Task.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
TaskInputOutputContextA context object that allows input and output from the task.Interfaceorg.apache.hadoop.mapreduceApache Hadoopjavadoc
TaskReportA report on the state of a task.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
TaskTrackerInfoInformation about TaskTracker.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
TaskTypeEnum for map, reduce, job-setup, job-cleanup, task-cleanup task types.Classorg.apache.hadoop.mapreduceApache Hadoopjavadoc
TextThis class stores text using standard UTF8 encoding.Classorg.apache.hadoop.ioApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.io.Text
TextInputFormatAn InputFormat for plain text files.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
TextInputFormatAn InputFormat for plain text files.Classorg.apache.hadoop.mapreduce.lib.inputApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.mapreduce.lib.input.TextInputFormat
TextOutputFormatAn OutputFormat that writes plain text files.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
TextOutputFormatAn OutputFormat that writes plain text files.Classorg.apache.hadoop.mapreduce.lib.outputApache Hadoopjavadoc
TextSplitterClassorg.apache.hadoop.mapreduce.lib.dbApache Hadoopjavadoc
TFileA TFile is a container of key-value pairs.Classorg.apache.hadoop.io.file.tfileApache Hadoopjavadoc
TimelineClientA client library that can be used to post some information in terms of a number of conceptual entities.Classorg.apache.hadoop.yarn.client.apiApache Hadoopjavadoc
TimelineDelegationTokenIdentifierClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc
TimelineDelegationTokenResponseClassorg.apache.hadoop.yarn.api.records.timelineApache Hadoopjavadoc
TimelineDelegationTokenSelectorClassorg.apache.hadoop.yarn.security.clientApache Hadoopjavadoc
TimelineDomain This class contains the information about a timeline domain, which is used to a user to host a number of timeline entities, isolating them from others'.Classorg.apache.hadoop.yarn.api.records.timelineApache Hadoopjavadoc
TimelineDomainsThe class that hosts a list of timeline domains.Classorg.apache.hadoop.yarn.api.records.timelineApache Hadoopjavadoc
TimelineEntitiesThe class that hosts a list of timeline entities.Classorg.apache.hadoop.yarn.api.records.timelineApache Hadoopjavadoc
TimelineEntity The class that contains the the meta information of some conceptual entity and its related events.Classorg.apache.hadoop.yarn.api.records.timelineApache Hadoopjavadoc
TimelineEventThe class that contains the information of an event that is related to some conceptual entity of an application.Classorg.apache.hadoop.yarn.api.records.timelineApache Hadoopjavadoc
TimelineEventsThe class that hosts a list of events, which are categorized according to their related entities.Classorg.apache.hadoop.yarn.api.records.timelineApache Hadoopjavadoc

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TimelinePutResponseA class that holds a list of put errors.Classorg.apache.hadoop.yarn.api.records.timelineApache Hadoopjavadoc
TimelineUtilsThe helper class for the timeline module.Classorg.apache.hadoop.yarn.util.timelineApache Hadoopjavadoc
TokenDescribes the input token stream.Classorg.apache.hadoop.record.compiler.generatedApache Hadoopjavadoc
TokenToken is the security entity used by the framework to verify authenticity of any resource.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
TokenCacheThis class provides user facing APIs for transferring secrets from the job client to the tasks.Classorg.apache.hadoop.mapreduce.securityApache Hadoopjavadoc
TokenCounterMapperTokenize the input values and emit each word with a count of 1.Classorg.apache.hadoop.mapreduce.lib.mapApache Hadoopjavadoc
TokenCountMapperA Mapper that maps text values into pairs.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
TokenMgrErrorClassorg.apache.hadoop.record.compiler.generatedApache Hadoopjavadoc
ToolA tool interface that supports handling of generic command-line options.Interfaceorg.apache.hadoop.utilApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.util.Tool
ToolRunnerA utility to help run Tools.Classorg.apache.hadoop.utilApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.util.ToolRunner
TotalOrderPartitionerPartitioner effecting a total order by reading split points from an externally generated source.Classorg.apache.hadoop.mapred.libApache Hadoopjavadoc
TotalOrderPartitionerPartitioner effecting a total order by reading split points from an externally generated source.Classorg.apache.hadoop.mapreduce.lib.partitionApache Hadoopjavadoc
TraceAdminProtocolProtocol interface that provides tracing.Interfaceorg.apache.hadoop.tracingApache Hadoopjavadoc
TraceAdminProtocolPBInterfaceorg.apache.hadoop.tracingApache Hadoopjavadoc
TrashProvides a trash facility which supports pluggable Trash policies.Classorg.apache.hadoop.fsApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.fs.Trash
TrashPolicyThis interface is used for implementing different Trash policies.Classorg.apache.hadoop.fsApache Hadoopjavadoc
TupleWritableWritable type storing multiple Writables.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
TupleWritableWritable type storing multiple Writables.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
TwoDArrayWritableA Writable for 2D arrays containing a matrix of instances of a class.Classorg.apache.hadoop.ioApache Hadoopjavadoc
TypeIDRepresents typeID for basic types.Classorg.apache.hadoop.record.metaApache Hadoopjavadoc
UniqValueCountThis class implements a value aggregator that dedupes a sequence of objects.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
UniqValueCountThis class implements a value aggregator that dedupes a sequence of objects.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
UnsupportedFileSystemExceptionFile system for a given file system name/scheme is not supportedSee Also:Serialized FormClassorg.apache.hadoop.fsApache Hadoopjavadoc
URLURL represents a serializable URL.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
UserDefinedValueAggregatorDescriptorThis class implements a wrapper for a user defined value aggregator It serves two functions: One is to create an object of Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc

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UserDefinedValueAggregatorDescriptorThis class implements a wrapper for a user defined value aggregator descriptor.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
UseSharedCacheResourceRequest The request from clients to the SharedCacheManager that claims a resource in the shared cache.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
UseSharedCacheResourceResponse The response from the SharedCacheManager to the client that indicates whether a requested resource exists in the cache.Classorg.apache.hadoop.yarn.api.protocolrecordsApache Hadoopjavadoc
UTCClockClassorg.apache.hadoop.yarn.utilApache Hadoopjavadoc
UtilClassorg.apache.hadoop.metrics.spiApache Hadoopjavadoc
UtilsSupporting Utility classes used by TFile, and shared by users of TFile.Classorg.apache.hadoop.io.file.tfileApache Hadoopjavadoc
UtilsA utility class.Classorg.apache.hadoop.mapredApache Hadoopjavadoc
UtilsVarious utility functions for Hadooop record I/O platform.Classorg.apache.hadoop.record.metaApache Hadoopjavadoc
UtilsVarious utility functions for Hadoop record I/O runtime.Classorg.apache.hadoop.recordApache Hadoopjavadoc
ValueAggregatorThis interface defines the minimal protocol for value aggregators.Interfaceorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueAggregatorThis interface defines the minimal protocol for value aggregators.Interfaceorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
ValueAggregatorBaseDescriptorThis class implements the common functionalities of the subclasses of ValueAggregatorDescriptor class.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueAggregatorBaseDescriptorThis class implements the common functionalities of the subclasses of ValueAggregatorDescriptor class.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
ValueAggregatorCombinerThis class implements the generic combiner of Aggregate.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueAggregatorCombinerThis class implements the generic combiner of Aggregate.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
ValueAggregatorDescriptorThis interface defines the contract a value aggregator descriptor must support.Interfaceorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueAggregatorDescriptorThis interface defines the contract a value aggregator descriptor must support.Interfaceorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
ValueAggregatorJobThis is the main class for creating a map/reduce job using Aggregate framework.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueAggregatorJobThis is the main class for creating a map/reduce job using Aggregate framework.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
ValueAggregatorJobBaseThis abstract class implements some common functionalities of the the generic mapper, reducer and combiner classes of Aggregate.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueAggregatorJobBaseThis abstract class implements some common functionalities of the the generic mapper, reducer and combiner classes of Aggregate.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
ValueAggregatorMapperThis class implements the generic mapper of Aggregate.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueAggregatorMapperThis class implements the generic mapper of Aggregate.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
ValueAggregatorReducerThis class implements the generic reducer of Aggregate.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueAggregatorReducerThis class implements the generic reducer of Aggregate.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc

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ValueHistogramThis class implements a value aggregator that computes the histogram of a sequence of strings.Classorg.apache.hadoop.mapred.lib.aggregateApache Hadoopjavadoc
ValueHistogramThis class implements a value aggregator that computes the histogram of a sequence of strings.Classorg.apache.hadoop.mapreduce.lib.aggregateApache Hadoopjavadoc
VectorTypeIDRepresents typeID for vector.Classorg.apache.hadoop.record.metaApache Hadoopjavadoc
VersionedWritableA base class for Writables that provides version checking.Classorg.apache.hadoop.ioApache Hadoopjavadoc
VersionMismatchExceptionThrown when Hadoop cannot read the version of the data storedSee Also:Serialized FormClassorg.apache.hadoop.fs.s3Apache Hadoopjavadoc
VersionMismatchExceptionThrown by VersionedWritable.Classorg.apache.hadoop.ioApache Hadoopjavadoc
ViewFileSystemViewFileSystem (extends the FileSystem interface) implements a client-side mount table.Classorg.apache.hadoop.fs.viewfsApache Hadoopjavadoc
ViewFsViewFs (extends the AbstractFileSystem interface) implements a client-side mount table.Classorg.apache.hadoop.fs.viewfsApache Hadoopjavadoc
VIntWritableA WritableComparable for integer values stored in variable-length format.Classorg.apache.hadoop.ioApache Hadoopjavadoc
VLongWritableA WritableComparable for longs in a variable-length format.Classorg.apache.hadoop.ioApache Hadoopjavadoc
VolumeIdOpaque interface that identifies a disk location.Interfaceorg.apache.hadoop.fsApache Hadoopjavadoc
WasbWASB implementation of AbstractFileSystem.Classorg.apache.hadoop.fs.azureApache Hadoopjavadoc
WasbFsckAn fsck tool implementation for WASB that does various admin/cleanup/recovery tasks on the WASB file system.Classorg.apache.hadoop.fs.azureApache Hadoopjavadoc
WrappedMapperA Mapper which wraps a given one to allow custom Mapper.Classorg.apache.hadoop.mapreduce.lib.mapApache Hadoopjavadoc
WrappedRecordReaderProxy class for a RecordReader participating in the join framework.Classorg.apache.hadoop.mapred.joinApache Hadoopjavadoc
WrappedRecordReaderProxy class for a RecordReader participating in the join framework.Classorg.apache.hadoop.mapreduce.lib.joinApache Hadoopjavadoc
WrappedReducerA Reducer which wraps a given one to allow for custom Reducer.Classorg.apache.hadoop.mapreduce.lib.reduceApache Hadoopjavadoc
WritableA serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.Interfaceorg.apache.hadoop.ioApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.io.Writable
WritableComparableA Writable which is also Comparable.Interfaceorg.apache.hadoop.ioApache Hadoopjavadoc
Check Code Snippets / Samples for org.apache.hadoop.io.WritableComparable
WritableComparatorA Comparator for WritableComparables.Classorg.apache.hadoop.ioApache Hadoopjavadoc
WritableFactoriesFactories for non-public writables.Classorg.apache.hadoop.ioApache Hadoopjavadoc
WritableFactoryA factory for a class of Writable.Interfaceorg.apache.hadoop.ioApache Hadoopjavadoc
WritableSerializationA Serialization for Writables that delegates to Writable.Classorg.apache.hadoop.io.serializerApache Hadoopjavadoc
WritableUtilsClassorg.apache.hadoop.ioApache Hadoopjavadoc
XAttrCodecThe value of XAttr is byte[], this class is to covert byte[] to some kind of string representation or convert back.Classorg.apache.hadoop.fsApache Hadoopjavadoc

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XAttrSetFlagClassorg.apache.hadoop.fsApache Hadoopjavadoc
XmlRecordInputClassorg.apache.hadoop.recordApache Hadoopjavadoc
XmlRecordOutputClassorg.apache.hadoop.recordApache Hadoopjavadoc
YarnApplicationAttemptStateenum YarnApplicationAttemptStateEnumeration of various states of a RMAppAttempt.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
YarnApplicationStateenum YarnApplicationStateEnumeration of various states of an ApplicationMaster.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
YarnClientClassorg.apache.hadoop.yarn.client.apiApache Hadoopjavadoc
YarnClientApplicationClassorg.apache.hadoop.yarn.client.apiApache Hadoopjavadoc
YarnClusterMetricsYarnClusterMetrics represents cluster metrics.Classorg.apache.hadoop.yarn.api.recordsApache Hadoopjavadoc
YarnConfigurationClassorg.apache.hadoop.yarn.confApache Hadoopjavadoc
YarnExceptionYarnException indicates exceptions from yarn servers.Classorg.apache.hadoop.yarn.exceptionsApache Hadoopjavadoc
YarnUncaughtExceptionHandlerThis class is intended to be installed by calling Thread.Classorg.apache.hadoop.yarnApache Hadoopjavadoc
ZKFCProtocolPBInterfaceorg.apache.hadoop.ha.protocolPBApache Hadoopjavadoc

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