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

- Interface Summary
  Interface | Description
  --- | ---
  AMPreemptionPolicy | Policy encoding the `MRAppMaster` response to preemption requests from the ResourceManager.

- Class Summary
  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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