// handle fungible preemption. Here we only look at the total amount of
        // resources to be preempted and pick enough of our containers to
        // satisfy that. We only support checkpointing for reducers for now.
// handle fungible preemption. Here we only look at the total amount of
        // resources to be preempted and pick enough of our containers to
        // satisfy that. We only support checkpointing for reducers for now. | CheckpointAMPreemptionPolicy.java