Uses of Package
org.apache.hadoop.mapred

Packages that use org.apache.hadoop.mapred

Package	Description
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.nativetask
org.apache.hadoop.mapred.pipes
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.lib.input
org.apache.hadoop.mapreduce.lib.output
org.apache.hadoop.mapreduce.security

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

Class	Description
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.
FileInputFormat.Counter	Deprecated.
FileOutputFormat	A base class for OutputFormat.
FileOutputFormat.Counter	Deprecated.
FileSplit	A section of an input file.
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.
InputSplitWithLocationInfo
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.
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.
JobTracker.State	State is no longer used since M/R 2.x.
Mapper	Maps input key/value pairs to a set of intermediate key/value pairs.
MapRunnable	Expert: Generic interface for Mappers.
Master.State
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.
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.
SequenceFileInputFormat	An InputFormat for SequenceFiles.
SequenceFileOutputFormat	An OutputFormat that writes SequenceFiles.
SplitLocationInfo
Task.Counter	Deprecated. Provided for compatibility.
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.
TaskReport	A report on the state of a task.

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

Class	Description
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

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.
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

Class	Description
FileInputFormat	A base class for file-based InputFormat.
FileOutputFormat	A base class for OutputFormat.
FileSplit	A section of an input file.
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

Class	Description
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

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.
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.nativetask

Class	Description
JobConf	A map/reduce job configuration.

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

Class	Description
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

Class	Description
ID	A general identifier, which internally stores the id as an integer.
SplitLocationInfo
TaskCompletionEvent	This is used to track task completion events on job tracker.

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

Class	Description
SplitLocationInfo

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

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

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

Class	Description
JobConf	A map/reduce job configuration.