Uses of Package
org.apache.hadoop.mapreduce

Packages that use org.apache.hadoop.mapreduce

Package	Description
org.apache.hadoop.fs.azurebfs.commit	Support for manifest committer.
org.apache.hadoop.fs.s3a.commit	Support for committing the output of analytics jobs directly to S3.
org.apache.hadoop.fs.s3a.commit.magic	This is the "Magic" committer and support.
org.apache.hadoop.mapred
org.apache.hadoop.mapred.lib
org.apache.hadoop.mapred.lib.db
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.counters	This package contains the implementations of different types of map-reduce counters.
org.apache.hadoop.mapreduce.lib.aggregate
org.apache.hadoop.mapreduce.lib.chain
org.apache.hadoop.mapreduce.lib.db
org.apache.hadoop.mapreduce.lib.fieldsel
org.apache.hadoop.mapreduce.lib.input
org.apache.hadoop.mapreduce.lib.jobcontrol
org.apache.hadoop.mapreduce.lib.join
org.apache.hadoop.mapreduce.lib.map
org.apache.hadoop.mapreduce.lib.output
org.apache.hadoop.mapreduce.lib.output.committer.manifest	Intermediate manifest committer.
org.apache.hadoop.mapreduce.lib.partition
org.apache.hadoop.mapreduce.lib.reduce
org.apache.hadoop.mapreduce.task
org.apache.hadoop.mapreduce.tools
org.apache.hadoop.tools	Command-line tools for MapReduce.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.fs.azurebfs.commit

Class	Description
TaskAttemptContext	The context for task attempts.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.fs.s3a.commit

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

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.fs.s3a.commit.magic

Class	Description
JobContext	A read-only view of the job that is provided to the tasks while they are running.
OutputCommitter	OutputCommitter describes the commit of task output for a Map-Reduce job.
TaskAttemptContext	The context for task attempts.

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

Class	Description
Cluster	Provides a way to access information about the map/reduce cluster.
Cluster.JobTrackerStatus
Counter	A named counter that tracks the progress of a map/reduce job.
Counters	Counters holds per job/task counters, defined either by the Map-Reduce framework or applications.
ID	A general identifier, which internally stores the id as an integer.
InputSplit	InputSplit represents the data to be processed by an individual Mapper.
JobACL	Job related ACLs
JobContext	A read-only view of the job that is provided to the tasks while they are running.
JobID	JobID represents the immutable and unique identifier for the job.
JobStatus	Describes the current status of a job.
JobStatus.State	Current state of the job
MRJobConfig
OutputCommitter	OutputCommitter describes the commit of task output for a Map-Reduce job.
QueueInfo	Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.
TaskAttemptContext	The context for task attempts.
TaskAttemptID	TaskAttemptID represents the immutable and unique identifier for a task attempt.
TaskCompletionEvent	This is used to track task completion events on job tracker.
TaskID	TaskID represents the immutable and unique identifier for a Map or Reduce Task.
TaskReport	A report on the state of a task.
TaskType	Enum for map, reduce, job-setup, job-cleanup, task-cleanup task types.

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

Class	Description
InputFormat	InputFormat describes the input-specification for a Map-Reduce job.
InputSplit	InputSplit represents the data to be processed by an individual Mapper.
JobContext	A read-only view of the job that is provided to the tasks while they are running.
Partitioner	Partitions the key space.
RecordReader	The record reader breaks the data into key/value pairs for input to the Mapper.
TaskAttemptContext	The context for task attempts.

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

Class	Description
InputFormat	InputFormat describes the input-specification for a Map-Reduce job.
OutputFormat	OutputFormat describes the output-specification for a Map-Reduce job.

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

Class	Description
Cluster	Provides a way to access information about the map/reduce cluster.
Cluster.JobTrackerStatus
ClusterMetrics	Status information on the current state of the Map-Reduce cluster.
Counter	A named counter that tracks the progress of a map/reduce job.
Counters	Counters holds per job/task counters, defined either by the Map-Reduce framework or applications.
ID	A general identifier, which internally stores the id as an integer.
InputFormat	InputFormat describes the input-specification for a Map-Reduce job.
InputSplit	InputSplit represents the data to be processed by an individual Mapper.
Job	The job submitter's view of the Job.
Job.JobState
Job.TaskStatusFilter
JobACL	Job related ACLs
JobContext	A read-only view of the job that is provided to the tasks while they are running.
JobCounter
JobID	JobID represents the immutable and unique identifier for the job.
JobPriority	Used to describe the priority of the running job.
JobStatus	Describes the current status of a job.
JobStatus.State	Current state of the job
Mapper	Maps input key/value pairs to a set of intermediate key/value pairs.
Mapper.Context	The Context passed on to the Mapper implementations.
MRJobConfig
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.
QueueAclsInfo	Class to encapsulate Queue ACLs for a particular user.
QueueInfo	Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.
QueueState	Enum representing queue state
RecordReader	The record reader breaks the data into key/value pairs for input to the Mapper.
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.
Reducer.Context	The Context passed on to the Reducer implementations.
TaskAttemptContext	The context for task attempts.
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
TaskCounter
TaskID	TaskID represents the immutable and unique identifier for a Map or Reduce Task.
TaskInputOutputContext	A context object that allows input and output from the task.
TaskReport	A report on the state of a task.
TaskTrackerInfo	Information about TaskTracker.
TaskType	Enum for map, reduce, job-setup, job-cleanup, task-cleanup task types.

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

Class	Description
Counter	A named counter that tracks the progress of a map/reduce job.
FileSystemCounter

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

Class	Description
Job	The job submitter's view of the Job.
Mapper	Maps input key/value pairs to a set of intermediate key/value pairs.
Mapper.Context	The Context passed on to the Mapper implementations.
Reducer	Reduces a set of intermediate values which share a key to a smaller set of values.
Reducer.Context	The Context passed on to the Reducer implementations.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.chain

Class	Description
Job	The job submitter's view of the Job.
Mapper	Maps input key/value pairs to a set of intermediate key/value pairs.
Mapper.Context	The Context passed on to the Mapper implementations.
Reducer	Reduces a set of intermediate values which share a key to a smaller set of values.
Reducer.Context	The Context passed on to the Reducer implementations.

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

Class	Description
InputFormat	InputFormat describes the input-specification for a Map-Reduce job.
InputSplit	InputSplit represents the data to be processed by an individual Mapper.
Job	The job submitter's view of the Job.
JobContext	A read-only view of the job that is provided to the tasks while they are running.
OutputCommitter	OutputCommitter describes the commit of task output for a Map-Reduce job.
OutputFormat	OutputFormat describes the output-specification for a Map-Reduce job.
RecordReader	The record reader breaks the data into key/value pairs for input to the Mapper.
RecordWriter	RecordWriter writes the output <key, value> pairs to an output file.
TaskAttemptContext	The context for task attempts.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.fieldsel

Class	Description
Mapper	Maps input key/value pairs to a set of intermediate key/value pairs.
Mapper.Context	The Context passed on to the Mapper implementations.
Reducer	Reduces a set of intermediate values which share a key to a smaller set of values.
Reducer.Context	The Context passed on to the Reducer implementations.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.input

Class	Description
InputFormat	InputFormat describes the input-specification for a Map-Reduce job.
InputSplit	InputSplit represents the data to be processed by an individual Mapper.
Job	The job submitter's view of the Job.
JobContext	A read-only view of the job that is provided to the tasks while they are running.
RecordReader	The record reader breaks the data into key/value pairs for input to the Mapper.
TaskAttemptContext	The context for task attempts.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.jobcontrol

Class	Description
Job	The job submitter's view of the Job.
JobID	JobID represents the immutable and unique identifier for the job.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.join

Class	Description
InputFormat	InputFormat describes the input-specification for a Map-Reduce job.
InputSplit	InputSplit represents the data to be processed by an individual Mapper.
JobContext	A read-only view of the job that is provided to the tasks while they are running.
RecordReader	The record reader breaks the data into key/value pairs for input to the Mapper.
TaskAttemptContext	The context for task attempts.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.map

Class	Description
Job	The job submitter's view of the Job.
JobContext	A read-only view of the job that is provided to the tasks while they are running.
MapContext	The context that is given to the Mapper.
Mapper	Maps input key/value pairs to a set of intermediate key/value pairs.
Mapper.Context	The Context passed on to the Mapper implementations.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.output

Class	Description
Job	The job submitter's view of the Job.
JobContext	A read-only view of the job that is provided to the tasks while they are running.
JobStatus.State	Current state of the job
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.
RecordWriter	RecordWriter writes the output <key, value> pairs to an output file.
TaskAttemptContext	The context for task attempts.
TaskInputOutputContext	A context object that allows input and output from the task.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.output.committer.manifest

Class	Description
JobContext	A read-only view of the job that is provided to the tasks while they are running.
JobStatus.State	Current state of the job
OutputCommitter	OutputCommitter describes the commit of task output for a Map-Reduce job.
TaskAttemptContext	The context for task attempts.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.partition

Class	Description
Job	The job submitter's view of the Job.
JobContext	A read-only view of the job that is provided to the tasks while they are running.
Partitioner	Partitions the key space.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.reduce

Class	Description
ReduceContext	The context passed to the Reducer.
Reducer	Reduces a set of intermediate values which share a key to a smaller set of values.
Reducer.Context	The Context passed on to the Reducer implementations.

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

Class	Description
JobContext	A read-only view of the job that is provided to the tasks while they are running.
MRJobConfig

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

Class	Description
Cluster	Provides a way to access information about the map/reduce cluster.
Counters	Counters holds per job/task counters, defined either by the Map-Reduce framework or applications.
Job	The job submitter's view of the Job.
JobStatus	Describes the current status of a job.
TaskAttemptID	TaskAttemptID represents the immutable and unique identifier for a task attempt.

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

Class	Description
Job	The job submitter's view of the Job.