| Interface | Description | 
|---|---|
| AMPreemptionPolicy | Policy encoding the  MRAppMasterresponse to preemption requests from the ResourceManager. | 
| Class | Description | 
|---|---|
| AMPreemptionPolicy.Context | |
| CheckpointAMPreemptionPolicy | This policy works in combination with an implementation of task
 checkpointing. | 
| KillAMPreemptionPolicy | Sample policy that aggressively kills tasks when requested. | 
| NoopAMPreemptionPolicy | NoOp policy that ignores all the requests for preemption. | 
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