Uses of Package
org.apache.hadoop.mapred

Packages that use org.apache.hadoop.mapred

org.apache.hadoop.mapred
org.apache.hadoop.mapred.jobcontrol
org.apache.hadoop.mapred.join
org.apache.hadoop.mapred.lib
org.apache.hadoop.mapred.lib.aggregate
org.apache.hadoop.mapred.lib.db
org.apache.hadoop.mapred.pipes
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.jobhistory
org.apache.hadoop.mapreduce.security
org.apache.hadoop.mapreduce.split
org.apache.hadoop.mapreduce.task
org.apache.hadoop.mapreduce.task.reduce

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred

ClusterStatus
Status information on the current state of the Map-Reduce cluster.

ClusterStatus.BlackListInfo
Class which encapsulates information about a blacklisted tasktracker.

Counters
A set of named counters.

Counters.Counter
A counter record, comprising its name and value.

Counters.Group
Group of counters, comprising of counters from a particular counter Enum class.

FileAlreadyExistsException
Used when target file already exists for any operation and is not configured to be overwritten.

FileInputFormat
A base class for file-based InputFormat.

FileOutputFormat
A base class for OutputFormat.

FileSplit
A section of an input file.

IFile.Reader
IFile.Reader to read intermediate map-outputs.

IFile.Writer
IFile.Writer to write out intermediate map-outputs.

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

InvalidJobConfException
This exception is thrown when jobconf misses some mendatory attributes or value of some attributes is invalid.

JobClient.TaskStatusFilter

JobConf
A map/reduce job configuration.

JobConfigurable
That what may be configured.

JobContext

JobID
JobID represents the immutable and unique identifier for the job.

JobInProgress.Counter
Deprecated. Provided for compatibility. Use JobCounter instead.

JobPriority
Used to describe the priority of the running job.

JobQueueInfo
Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.

JobStatus
Describes the current status of a job.

JvmTask
Task abstraction that can be serialized, implements the writable interface.

MapOutputFile
Manipulate the working area for the transient store for maps and reduces.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

MapRunnable
Expert: Generic interface for Mappers.

MapTaskCompletionEventsUpdate
A class that represents the communication between the tasktracker and child tasks w.r.t the map task completion events.

Master.State

Merger.Segment

Operation
Generic operation that maps to the dependent set of ACLs that drive the authorization of the operation.

OutputCollector
Collects the <key, value> pairs output by Mappers and Reducers.

OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

Partitioner
Partitions the key space.

QueueACL
Enum representing an AccessControlList that drives set of operations that can be performed on a queue.

RawKeyValueIterator
RawKeyValueIterator is an iterator used to iterate over the raw keys and values during sort/merge of intermediate data.

RecordReader
RecordReader reads <key, value> pairs from an InputSplit.

RecordWriter
RecordWriter writes the output <key, value> pairs to an output file.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

RunningJob
RunningJob is the user-interface to query for details on a running Map-Reduce job.

SequenceFileInputFilter.FilterBase
base class for Filters

SequenceFileInputFormat
An InputFormat for SequenceFiles.

SequenceFileOutputFormat
An OutputFormat that writes SequenceFiles.

Task
Base class for tasks.

Task.CombinerRunner

Task.Counter
Deprecated. Provided for compatibility. Use TaskCounter instead.

Task.TaskReporter

TaskAttemptContext

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

TaskCompletionEvent
This is used to track task completion events on job tracker.

TaskCompletionEvent.Status

TaskID
TaskID represents the immutable and unique identifier for a Map or Reduce Task.

TaskLog.LogName
The filter for userlogs.

TaskReport
A report on the state of a task.

TaskStatus
Describes the current status of a task.

TaskStatus.Phase

TaskStatus.State

TaskUmbilicalProtocol
Protocol that task child process uses to contact its parent process.

TIPStatus
The states of a Tasks.

Utils.OutputFileUtils.OutputLogFilter
This class filters log files from directory given It doesnt accept paths having _logs.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.jobcontrol

JobClient
JobClient is the primary interface for the user-job to interact with the cluster.

JobConf
A map/reduce job configuration.

JobID
JobID represents the immutable and unique identifier for the job.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.join

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

JobConf
A map/reduce job configuration.

RecordReader
RecordReader reads <key, value> pairs from an InputSplit.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.lib

FileInputFormat
A base class for file-based InputFormat.

FileOutputFormat
A base class for OutputFormat.

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

JobConf
A map/reduce job configuration.

JobConfigurable
That what may be configured.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

MapReduceBase
Base class for Mapper and Reducer implementations.

MapRunnable
Expert: Generic interface for Mappers.

OutputCollector
Collects the <key, value> pairs output by Mappers and Reducers.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

Partitioner
Partitions the key space.

RecordReader
RecordReader reads <key, value> pairs from an InputSplit.

RecordWriter
RecordWriter writes the output <key, value> pairs to an output file.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.lib.aggregate

JobConf
A map/reduce job configuration.

JobConfigurable
That what may be configured.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

OutputCollector
Collects the <key, value> pairs output by Mappers and Reducers.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.lib.db

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

JobConf
A map/reduce job configuration.

JobConfigurable
That what may be configured.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

RecordReader
RecordReader reads <key, value> pairs from an InputSplit.

RecordWriter
RecordWriter writes the output <key, value> pairs to an output file.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.pipes

JobConf
A map/reduce job configuration.

RunningJob
RunningJob is the user-interface to query for details on a running Map-Reduce job.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce

ID
A general identifier, which internally stores the id as an integer.

TIPStatus
The states of a Tasks.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.jobhistory

JobPriority
Used to describe the priority of the running job.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.security

JobConf
A map/reduce job configuration.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.split

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.task

RawKeyValueIterator
RawKeyValueIterator is an iterator used to iterate over the raw keys and values during sort/merge of intermediate data.

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.task.reduce

Counters.Counter
A counter record, comprising its name and value.

IFile.Reader
IFile.Reader to read intermediate map-outputs.

IFile.Writer
IFile.Writer to write out intermediate map-outputs.

JobConf
A map/reduce job configuration.

MapOutputFile
Manipulate the working area for the transient store for maps and reduces.

RawKeyValueIterator
RawKeyValueIterator is an iterator used to iterate over the raw keys and values during sort/merge of intermediate data.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

Task
Base class for tasks.

Task.CombineOutputCollector
OutputCollector for the combiner.

TaskStatus
Describes the current status of a task.

TaskUmbilicalProtocol
Protocol that task child process uses to contact its parent process.