@InterfaceAudience.Private
| 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 | 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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