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Package org.apache.hadoop.mapred

Removed Classes
OutputFormatBase A base class for OutputFormat.
StatusHttpServer.StackServlet A very simple servlet to serve up a text representation of the current stack traces.
TaskTracker.Child The main() for child processes.
TaskTracker.TaskTrackerMetrics  
 

Added Classes
FileOutputCommitter An OutputCommitter that commits files specified in job output directory i.e.
JobContext  
JobQueueInfo Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.
OutputCommitter OutputCommitter describes the commit of task output for a Map-Reduce job.
SkipBadRecords Utility class for skip bad records functionality.
TaskAttemptContext  
 

Changed Classes and Interfaces
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.
InputFormat InputFormat describes the input-specification for a Map-Reduce job.
JobClient JobClient is the primary interface for the user-job to interact with the JobTracker.
JobClient.TaskStatusFilter  
JobConf A map/reduce job configuration.
JobHistory Provides methods for writing to and reading from job history.
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.MapAttempt Helper class for logging or reading back events related to start, finish or failure of a Map Attempt on a node.
JobHistory.RecordTypes Record types are identifiers for each line of log in history files.
JobHistory.ReduceAttempt Helper class for logging or reading back events related to start, finish or failure of a Map Attempt on a node.
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.
JobPriority Used to describe the priority of the running job.
JobProfile A JobProfile is a MapReduce primitive.
JobStatus Describes the current status of a job.
JobTracker JobTracker is the central location for submitting and tracking MR jobs in a network environment.
JobTracker.State  
LineRecordReader Treats keys as offset in file and value as line.
LineRecordReader.LineReader A class that provides a line reader from an input stream.
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.
SequenceFileAsBinaryOutputFormat An OutputFormat that writes keys, values to SequenceFiles in binary(raw) format
SequenceFileInputFormat An InputFormat for SequenceFiles.
StatusHttpServer A mapred http server.
TaskCompletionEvent This is used to track task completion events on job tracker.
TaskCompletionEvent.Status  
TaskLog A simple logger to handle the task-specific user logs.
TaskLog.LogName The filter for userlogs.
TaskLogAppender A simple log4j-appender for the task child's map-reduce system logs.
TaskLogServlet A servlet that is run by the TaskTrackers to provide the task logs via http.
TaskReport A report on the state of a task.
TaskTracker TaskTracker is a process that starts and tracks MR Tasks in a networked environment.
TextOutputFormat.LineRecordWriter