org.apache.flink.runtime.executiongraph.failover

Class ExecutionFailureHandler

java.lang.Object

org.apache.flink.runtime.executiongraph.failover.ExecutionFailureHandler

public class ExecutionFailureHandler
extends Object

This handler deals with task failures to return a FailureHandlingResult which contains tasks to restart to recover from failures.

Constructor Summary

Constructors

Constructor and Description

ExecutionFailureHandler(SchedulingTopology schedulingTopology, FailoverStrategy failoverStrategy, RestartBackoffTimeStrategy restartBackoffTimeStrategy, org.apache.flink.runtime.concurrent.ComponentMainThreadExecutor mainThreadExecutor, Collection<org.apache.flink.core.failure.FailureEnricher> failureEnrichers, org.apache.flink.core.failure.FailureEnricher.Context taskFailureCtx, org.apache.flink.core.failure.FailureEnricher.Context globalFailureCtx) Creates the handler to deal with task failures.

Method Summary

Modifier and Type	Method and Description
FailureHandlingResult	getFailureHandlingResult(Execution failedExecution, Throwable cause, long timestamp) Return result of failure handling.
FailureHandlingResult	getGlobalFailureHandlingResult(Throwable cause, long timestamp) Return result of failure handling on a global failure.
long	getNumberOfRestarts()
static boolean	isUnrecoverableError(Throwable cause)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExecutionFailureHandler

public ExecutionFailureHandler(SchedulingTopology schedulingTopology,
                               FailoverStrategy failoverStrategy,
                               RestartBackoffTimeStrategy restartBackoffTimeStrategy,
                               org.apache.flink.runtime.concurrent.ComponentMainThreadExecutor mainThreadExecutor,
                               Collection<org.apache.flink.core.failure.FailureEnricher> failureEnrichers,
                               org.apache.flink.core.failure.FailureEnricher.Context taskFailureCtx,
                               org.apache.flink.core.failure.FailureEnricher.Context globalFailureCtx)

Creates the handler to deal with task failures.

Parameters:

schedulingTopology - contains the topology info for failover

failoverStrategy - helps to decide tasks to restart on task failures

restartBackoffTimeStrategy - helps to decide whether to restart failed tasks and the restarting delay

mainThreadExecutor - the main thread executor of the job master

failureEnrichers - a collection of FailureEnricher that enrich failures

taskFailureCtx - Task failure Context used by FailureEnrichers

globalFailureCtx - Global failure Context used by FailureEnrichers

Method Detail

getFailureHandlingResult

public FailureHandlingResult getFailureHandlingResult(Execution failedExecution,
                                                      Throwable cause,
                                                      long timestamp)

Return result of failure handling. Can be a set of task vertices to restart and a delay of the restarting. Or that the failure is not recoverable and the reason for it.

Parameters:

failedExecution - is the failed execution

cause - of the task failure

timestamp - of the task failure

Returns:

result of the failure handling

getGlobalFailureHandlingResult

public FailureHandlingResult getGlobalFailureHandlingResult(Throwable cause,
                                                            long timestamp)

Return result of failure handling on a global failure. Can be a set of task vertices to restart and a delay of the restarting. Or that the failure is not recoverable and the reason for it.

Parameters:

cause - of the task failure

timestamp - of the task failure

Returns:

result of the failure handling

isUnrecoverableError

public static boolean isUnrecoverableError(Throwable cause)

getNumberOfRestarts

public long getNumberOfRestarts()