@InterfaceAudience.Private
| Interface | Description | 
|---|---|
| AMInfo | |
| Counter | |
| CounterGroup | |
| Counters | |
| JobReport | |
| TaskAttemptCompletionEvent | |
| TaskAttemptReport | |
| TaskReport | 
| Class | Description | 
|---|---|
| JobId | JobIdrepresents the globally unique 
 identifier for a MapReduce job. | 
| TaskAttemptId | TaskAttemptIdrepresents the unique identifier for a task
 attempt. | 
| TaskId | TaskIdrepresents the unique identifier for a Map or Reduce
 Task. | 
| Enum | Description | 
|---|---|
| Avataar | |
| JobState | |
| Locality | |
| Phase | |
| TaskAttemptCompletionEventStatus | |
| TaskAttemptState | |
| TaskState | |
| TaskType | 
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