Package org.apache.hadoop.mapred

Removed Classes
JobShell	Provide command line parsing for JobSubmission job submission looks like hadoop jar -libjars -archives -files inputjar args
StatusHttpServer	A mapred http server.
StatusHttpServer.TaskGraphServlet	The servlet that outputs svg graphics for map / reduce task statuses

 

Added Classes and Interfaces
MapReducePolicyProvider	PolicyProvider for Map-Reduce protocols.
RawKeyValueIterator	RawKeyValueIterator is an iterator used to iterate over the raw keys and values during sort/merge of intermediate data.
TIPStatus	The states of a TaskInProgress as seen by the JobTracker.
TaskGraphServlet	The servlet that outputs svg graphics for map / reduce task statuses

 

Changed Classes and Interfaces
ClusterStatus	Status information on the current state of the Map-Reduce cluster.
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.
FileInputFormat	A base class for file-based InputFormat
FileOutputFormat	A base class for OutputFormat
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
InvalidInputException	This 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 by one.
IsolationRunner
JobClient	JobClient is the primary interface for the user-job to interact with the JobTracker JobClient provides facilities to submit jobs track their progress access component-tasks' reports/logs get the Map-Reduce cluster status information etc.
JobClient.TaskStatusFilter
JobConf	A map/reduce job configuration.
JobContext	@deprecated Use org.apache.hadoop.mapreduce.JobContext instead.
JobHistory.JobInfo	Helper class for logging or reading back events related to job start finish or failure.
JobHistory.Keys	Job history files contain key="value" pairs where keys belong to this enum.
JobHistory.Listener	Callback interface for reading back log events from JobHistory.
JobHistory.RecordTypes	Record types are identifiers for each line of log in history files.
JobHistory.Task	Helper class for logging or reading back events related to Task's start finish or failure.
JobHistory.Values	This enum contains some of the values commonly used by history log events.
JobID	JobID represents the immutable and unique identifier for the job.
JobPriority	Used to describe the priority of the running job.
JobProfile	A JobProfile is a MapReduce primitive.
JobTracker	JobTracker is the central location for submitting and tracking MR jobs in a network environment.
JobTracker.State
KeyValueLineRecordReader	This class treats a line in the input as a key/value pair separated by a separator character.
KeyValueTextInputFormat	An InputFormat for plain text files.
LineRecordReader	Treats keys as offset in file and value as line.
MapFileOutputFormat	An OutputFormat that writes MapFile}s
MapRunnable	Expert: Generic interface for
MapRunner	Default MapRunnable implementation.
Mapper	Maps input key/value pairs to a set of intermediate key/value pairs.
MultiFileInputFormat	An abstract InputFormat that returns i int) method.
MultiFileSplit	A sub-collection of input files.
OutputCollector	Collects the <key value> pairs output by an
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.
SequenceFileAsBinaryInputFormat	InputFormat reading keys values from SequenceFiles in binary (raw) format.
SequenceFileAsBinaryInputFormat. SequenceFileAsBinaryRecordReader	Read records from a SequenceFile as binary (raw) bytes.
SequenceFileAsBinaryOutputFormat	An OutputFormat that writes keys values to i binary(raw) format
SequenceFileAsTextInputFormat	This class is similar to SequenceFileInputFormat except it generates SequenceFileAsTextRecordReader which converts the input keys and values to their String forms by calling toString() method.
SequenceFileAsTextRecordReader	This class converts the input keys and values to their String forms by calling toString() method.
SequenceFileInputFilter	A class that allows a map/red job to work on a sample of sequence files.
SequenceFileInputFormat	An InputFormat for
SequenceFileOutputFormat	An OutputFormat that writes
SequenceFileRecordReader	An RecordReader for SequenceFile}s
TaskAttemptContext	@deprecated Use org.apache.hadoop.mapreduce.TaskAttemptContext instead.
TaskAttemptID	TaskAttemptID represents the immutable and unique identifier for a task attempt.
TaskCompletionEvent.Status
TaskID	TaskID represents the immutable and unique identifier for a Map or Reduce Task.
TaskLog	A simple logger to handle the task-specific user logs.
TaskLog.LogName	The filter for userlogs.
TaskReport	A report on the state of a task.
TaskTracker	TaskTracker is a process that starts and tracks MR Tasks in a networked environment.
TextInputFormat	An InputFormat for plain text files.
TextOutputFormat	An OutputFormat that writes plain text files.
TextOutputFormat.LineRecordWriter