@InterfaceAudience.Private

# Package org.apache.hadoop.mapreduce.v2.app

- Interface Summary
  Interface | Description
  --- | ---
  AppContext | Context interface for sharing information across components in YARN App.
  TaskAttemptListener | This class listens for changes to the state of a Task.

- Class Summary
  Class | Description
  --- | ---
  ClusterInfo |
  JobEndNotifier | This class handles job end notification.
  MRAppMaster | The Map-Reduce Application Master.
  MRClientSecurityInfo |
  TaskAttemptFinishingMonitor | This class generates TA_TIMED_OUT if the task attempt stays in FINISHING state for too long.
  TaskHeartbeatHandler | This class keeps track of tasks that have already been launched.

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