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Package org.apache.hadoop.mapred

Added Classes and Interfaces
AdminOperationsProtocol Protocol for admin operations.
DefaultTaskController The default implementation for controlling tasks.
JobInProgress JobInProgress maintains all the info for keeping a Job on the straight and narrow.
JobInProgress.Counter  
JobTrackerPlugin JobTrackerPlugins are found in mapred.jobtracker.plugins and are started and stopped by a PluginDispatcher during JobTracker start-up.
JvmTask  
MapTaskCompletionEventsUpdate A class that represents the communication between the tasktracker and child tasks w.r.t the map task completion events.
Operation Generic operation that maps to the dependent set of ACLs that drive the authorization of the operation.
Task Base class for tasks.
Task.CombineOutputCollector OutputCollector for the combiner.
Task.CombineValuesIterator  
Task.CombinerRunner  
Task.Counter  
Task.NewCombinerRunner  
Task.OldCombinerRunner  
Task.TaskReporter  
TaskController Controls initialization finalization and clean up of tasks and also the launching and killing of task JVMs.
TaskController.DistributedCacheFileContext This is used for initializing the private localized files in distributed cache.
TaskController.InitializationContext NOTE: This class is internal only class and not intended for users
TaskInProgress TaskInProgress maintains all the info needed for a Task in the lifetime of its owning Job.
TaskLogsTruncater The class for truncating the user logs.
TaskStatus Describes the current status of a task.
TaskStatus.Phase  
TaskStatus.State  
TaskTrackerStatus A TaskTrackerStatus is a MapReduce primitive.
TaskTrackerStatus.ResourceStatus Class representing a collection of resources on this tasktracker.
TaskUmbilicalProtocol Protocol that task child process uses to contact its parent process.
UserLogCleaner This is used only in UserLogManager to manage cleanup of user logs.
Utils A utility class.
Utils.OutputFileUtils  
Utils.OutputFileUtils.
OutputFilesFilter
This class filters output(part) files from the given directory It does not accept files with filenames _logs and _SUCCESS.
Utils.OutputFileUtils.
OutputLogFilter
This class filters log files from directory given It doesnt accept paths having _logs.
 

Changed Classes
ClusterStatus Status information on the current state of the Map-Reduce cluster.
FileOutputCommitter An OutputCommitter that commits files specified in job output directory i.e.
InvalidJobConfException This exception is thrown when jobconf misses some mendatory attributes or value of some attributes is invalid.
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.
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.
JobStatus Describes the current status of a job.
JobTracker JobTracker is the central location for submitting and tracking MR jobs in a network environment.
OutputCommitter OutputCommitter describes the commit of task output for a Map-Reduce job.
OutputLogFilter This class filters log files from directory given It doesnt accept paths having _logs.
TaskLog A simple logger to handle the task-specific user logs.
TaskLogAppender A simple log4j-appender for the task child's map-reduce system logs.
TaskTracker TaskTracker is a process that starts and tracks MR Tasks in a networked environment.