| Package | Description | 
|---|---|
| org.apache.hadoop.mapred | |
| org.apache.hadoop.mapreduce | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | TaskIDTaskID represents the immutable and unique identifier for 
 a Map or Reduce Task. | 
| Modifier and Type | Method and Description | 
|---|---|
| static TaskID | TaskID. downgrade(TaskID old)Downgrade a new TaskID to an old one | 
| Modifier and Type | Method and Description | 
|---|---|
| static TaskID | TaskID. forName(String str)Construct a TaskID object from given string. | 
| TaskID | TaskAttemptID. getTaskID()Returns the  TaskIDobject that this task attempt belongs to | 
| Constructor and Description | 
|---|
| TaskAttemptID(TaskID taskId,
             int id)Constructs a TaskAttemptID object from given  TaskID. | 
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