Package org.apache.flink.runtime.scheduler.strategy

Interface SchedulingStrategy

All Known Implementing Classes:
PipelinedRegionSchedulingStrategy, VertexwiseSchedulingStrategy
public interface SchedulingStrategy
Component which encapsulates the scheduling logic. It can react to execution state changes and partition consumable events. Moreover, it is responsible for resolving task failures.

  • Method Details

    • startScheduling

      void startScheduling()
      Called when the scheduling is started (initial scheduling operation).

    • restartTasks

      void restartTasks(Set<ExecutionVertexID> verticesToRestart)
      Called whenever vertices need to be restarted (due to task failure).
      Parameters:
      verticesToRestart - The tasks need to be restarted

    • onExecutionStateChange

      void onExecutionStateChange(ExecutionVertexID executionVertexId, ExecutionState executionState)
      Called whenever an Execution changes its state.
      Parameters:
      executionVertexId - The id of the task
      executionState - The new state of the execution

    • onPartitionConsumable

      void onPartitionConsumable(IntermediateResultPartitionID resultPartitionId)
      Called whenever an IntermediateResultPartition becomes consumable.
      Parameters:
      resultPartitionId - The id of the result partition

    • scheduleAllVerticesIfPossible

      default void scheduleAllVerticesIfPossible()
      Schedules all vertices and excludes any vertices that are already finished or whose inputs are not yet ready.