org.apache.flink.runtime.scheduler.adaptivebatch

Interface SpeculativeExecutionHandler

All Known Implementing Classes:

DefaultSpeculativeExecutionHandler, DummySpeculativeExecutionHandler

public interface SpeculativeExecutionHandler

Interface for managing speculative execution of tasks and handling slow task detection.

Method Summary

Modifier and Type	Method and Description
boolean	handleTaskFailure(Execution failedExecution, Throwable error, BiConsumer<Execution,Throwable> handleLocalExecutionAttemptFailure) Handles a task failure.
void	init(ExecutionGraph executionGraph, org.apache.flink.runtime.concurrent.ComponentMainThreadExecutor mainThreadExecutor, org.apache.flink.metrics.MetricGroup metricGroup) Initial speculative execution handler.
void	notifyTaskFailed(Execution execution) Notifies that a task has failed its execution.
void	notifyTaskFinished(Execution execution, Function<ExecutionVertexID,CompletableFuture<?>> cancelPendingExecutionsFunction) Notifies that a task has finished its execution.
void	resetForNewExecution(ExecutionVertexID executionVertexId) Resets the state of the component for a new execution of a specific execution vertex.
void	stopSlowTaskDetector() Stops the slow task detector.

Method Detail

init

void init(ExecutionGraph executionGraph,
          org.apache.flink.runtime.concurrent.ComponentMainThreadExecutor mainThreadExecutor,
          org.apache.flink.metrics.MetricGroup metricGroup)

Initial speculative execution handler.

stopSlowTaskDetector

void stopSlowTaskDetector()

Stops the slow task detector.

notifyTaskFinished

void notifyTaskFinished(Execution execution,
                        Function<ExecutionVertexID,CompletableFuture<?>> cancelPendingExecutionsFunction)

Notifies that a task has finished its execution.

Parameters:

execution - the execution that has finished

cancelPendingExecutionsFunction - the function to cancel pending executions

notifyTaskFailed

void notifyTaskFailed(Execution execution)

Notifies that a task has failed its execution.

Parameters:

execution - the execution that has failed

handleTaskFailure

boolean handleTaskFailure(Execution failedExecution,
                          @Nullable
                          Throwable error,
                          BiConsumer<Execution,Throwable> handleLocalExecutionAttemptFailure)

Handles a task failure.

Parameters:

failedExecution - the execution that failed

error - the error that caused the failure, if available

handleLocalExecutionAttemptFailure - a consumer that handles local execution attempt failure

Returns:

true if the failure was handled as a local failure, false otherwise

resetForNewExecution

void resetForNewExecution(ExecutionVertexID executionVertexId)

Resets the state of the component for a new execution of a specific execution vertex.

Parameters:

executionVertexId - the ID of the execution vertex to reset