org.apache.hadoop.mapreduce.task.annotation
Annotation Type Checkpointable

@Documented
@Target(value=TYPE)
@Retention(value=RUNTIME)
@InterfaceAudience.Public
@InterfaceStability.Evolving
public @interface Checkpointable

Contract representing to the framework that the task can be safely preempted and restarted between invocations of the user-defined function. This is often true when the result of a function does not rely on state derived from previous elements in the record stream, but the guarantee is left as an exercise to the implementor.