org.apache.flink.runtime.jobgraph.tasks.CheckpointCoordinatorConfiguration Java Examples

@Nonnull
private JobGraph createJobGraphFromJobVerticesWithCheckpointing(SavepointRestoreSettings savepointRestoreSettings, JobVertex... jobVertices) {
	final JobGraph jobGraph = new JobGraph(jobVertices);

	// enable checkpointing which is required to resume from a savepoint
	final CheckpointCoordinatorConfiguration checkpoinCoordinatorConfiguration = new CheckpointCoordinatorConfiguration(
		1000L,
		1000L,
		1000L,
		1,
		CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
		true);
	final JobCheckpointingSettings checkpointingSettings = new JobCheckpointingSettings(
		Collections.emptyList(),
		Collections.emptyList(),
		Collections.emptyList(),
		checkpoinCoordinatorConfiguration,
		null);
	jobGraph.setSnapshotSettings(checkpointingSettings);
	jobGraph.setSavepointRestoreSettings(savepointRestoreSettings);

	return jobGraph;
}
 

private static CheckpointConfigInfo createCheckpointConfigInfo(AccessExecutionGraph executionGraph) throws RestHandlerException {
	final CheckpointCoordinatorConfiguration checkpointCoordinatorConfiguration = executionGraph.getCheckpointCoordinatorConfiguration();

	if (checkpointCoordinatorConfiguration == null) {
		throw new RestHandlerException(
			"Checkpointing is not enabled for this job (" + executionGraph.getJobID() + ").",
			HttpResponseStatus.NOT_FOUND);
	} else {
		CheckpointRetentionPolicy retentionPolicy = checkpointCoordinatorConfiguration.getCheckpointRetentionPolicy();

		CheckpointConfigInfo.ExternalizedCheckpointInfo externalizedCheckpointInfo = new CheckpointConfigInfo.ExternalizedCheckpointInfo(
				retentionPolicy != CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
				retentionPolicy != CheckpointRetentionPolicy.RETAIN_ON_CANCELLATION);

		return new CheckpointConfigInfo(
			checkpointCoordinatorConfiguration.isExactlyOnce() ? CheckpointConfigInfo.ProcessingMode.EXACTLY_ONCE : CheckpointConfigInfo.ProcessingMode.AT_LEAST_ONCE,
			checkpointCoordinatorConfiguration.getCheckpointInterval(),
			checkpointCoordinatorConfiguration.getCheckpointTimeout(),
			checkpointCoordinatorConfiguration.getMinPauseBetweenCheckpoints(),
			checkpointCoordinatorConfiguration.getMaxConcurrentCheckpoints(),
			externalizedCheckpointInfo);
	}
}
 

@Nonnull
private JobGraph createJobGraphFromJobVerticesWithCheckpointing(SavepointRestoreSettings savepointRestoreSettings, JobVertex... jobVertices) {
	final JobGraph jobGraph = new JobGraph(jobVertices);

	// enable checkpointing which is required to resume from a savepoint
	final CheckpointCoordinatorConfiguration checkpoinCoordinatorConfiguration = new CheckpointCoordinatorConfiguration(
		1000L,
		1000L,
		1000L,
		1,
		CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
		true,
		false,
		false,
		0);
	final JobCheckpointingSettings checkpointingSettings = new JobCheckpointingSettings(
		Collections.emptyList(),
		Collections.emptyList(),
		Collections.emptyList(),
		checkpoinCoordinatorConfiguration,
		null);
	jobGraph.setSnapshotSettings(checkpointingSettings);
	jobGraph.setSavepointRestoreSettings(savepointRestoreSettings);

	return jobGraph;
}
 

private static CheckpointCoordinator instantiateCheckpointCoordinator(JobID jid, ExecutionVertex... ackVertices) {
	CheckpointCoordinatorConfiguration chkConfig = new CheckpointCoordinatorConfiguration(
		10000000L,
		600000L,
		0L,
		1,
		CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
		true,
		false,
		0);
	return new CheckpointCoordinator(
			jid,
			chkConfig,
			new ExecutionVertex[0],
			ackVertices,
			new ExecutionVertex[0],
			new StandaloneCheckpointIDCounter(),
			new StandaloneCompletedCheckpointStore(10),
			new MemoryStateBackend(),
			Executors.directExecutor(),
			SharedStateRegistry.DEFAULT_FACTORY,
			new CheckpointFailureManager(
				0,
				NoOpFailJobCall.INSTANCE));
}
 

private static JobCheckpointingSettings createCheckpointSettingsWithInterval(final long checkpointInterval) {
	final CheckpointCoordinatorConfiguration checkpointCoordinatorConfiguration = new CheckpointCoordinatorConfiguration(
		checkpointInterval,
		Long.MAX_VALUE,
		Long.MAX_VALUE,
		Integer.MAX_VALUE,
		CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
		true,
		false,
		false,
		0);

	return new JobCheckpointingSettings(
		Collections.emptyList(),
		Collections.emptyList(),
		Collections.emptyList(),
		checkpointCoordinatorConfiguration,
		null);
}
 

private static void enableCheckpointing(ExecutionGraph eg) {
	ArrayList<ExecutionJobVertex> jobVertices = new ArrayList<>(eg.getAllVertices().values());
	CheckpointCoordinatorConfiguration chkConfig = new CheckpointCoordinatorConfiguration(
		1000,
		100,
		0,
		1,
		CheckpointRetentionPolicy.RETAIN_ON_CANCELLATION,
		true,
		false,
		0);
	eg.enableCheckpointing(
			chkConfig,
			jobVertices,
			jobVertices,
			jobVertices,
			Collections.emptyList(),
			new StandaloneCheckpointIDCounter(),
			new StandaloneCompletedCheckpointStore(1),
			new MemoryStateBackend(),
			new CheckpointStatsTracker(
				0,
				jobVertices,
				mock(CheckpointCoordinatorConfiguration.class),
				new UnregisteredMetricsGroup()));
}
 

private static CheckpointConfigInfo createCheckpointConfigInfo(AccessExecutionGraph executionGraph) throws RestHandlerException {
	final CheckpointCoordinatorConfiguration checkpointCoordinatorConfiguration = executionGraph.getCheckpointCoordinatorConfiguration();

	if (checkpointCoordinatorConfiguration == null) {
		throw new RestHandlerException(
			"Checkpointing is not enabled for this job (" + executionGraph.getJobID() + ").",
			HttpResponseStatus.NOT_FOUND);
	} else {
		CheckpointRetentionPolicy retentionPolicy = checkpointCoordinatorConfiguration.getCheckpointRetentionPolicy();

		CheckpointConfigInfo.ExternalizedCheckpointInfo externalizedCheckpointInfo = new CheckpointConfigInfo.ExternalizedCheckpointInfo(
				retentionPolicy != CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
				retentionPolicy != CheckpointRetentionPolicy.RETAIN_ON_CANCELLATION);

		String stateBackendName = executionGraph.getStateBackendName().orElse(null);

		return new CheckpointConfigInfo(
			checkpointCoordinatorConfiguration.isExactlyOnce() ? CheckpointConfigInfo.ProcessingMode.EXACTLY_ONCE : CheckpointConfigInfo.ProcessingMode.AT_LEAST_ONCE,
			checkpointCoordinatorConfiguration.getCheckpointInterval(),
			checkpointCoordinatorConfiguration.getCheckpointTimeout(),
			checkpointCoordinatorConfiguration.getMinPauseBetweenCheckpoints(),
			checkpointCoordinatorConfiguration.getMaxConcurrentCheckpoints(),
			externalizedCheckpointInfo,
			stateBackendName);
	}
}
 

/**
 * Tests that no minimum delay between savepoints is enforced.
 */
@Test
public void testMinDelayBetweenSavepoints() throws Exception {
	CheckpointCoordinatorConfiguration chkConfig =
		new CheckpointCoordinatorConfigurationBuilder()
			.setMinPauseBetweenCheckpoints(100000000L) // very long min delay => should not affect savepoints
			.setMaxConcurrentCheckpoints(1)
			.build();
	CheckpointCoordinator coord =
		new CheckpointCoordinatorBuilder()
			.setCheckpointCoordinatorConfiguration(chkConfig)
			.setCompletedCheckpointStore(new StandaloneCompletedCheckpointStore(2))
			.setTimer(manuallyTriggeredScheduledExecutor)
			.build();

	String savepointDir = tmpFolder.newFolder().getAbsolutePath();

	CompletableFuture<CompletedCheckpoint> savepoint0 = coord.triggerSavepoint(savepointDir);
	assertFalse("Did not trigger savepoint", savepoint0.isDone());

	CompletableFuture<CompletedCheckpoint> savepoint1 = coord.triggerSavepoint(savepointDir);
	assertFalse("Did not trigger savepoint", savepoint1.isDone());
}
 

/**
 * Creates a new checkpoint stats tracker.
 *
 * @param numRememberedCheckpoints Maximum number of checkpoints to remember, including in progress ones.
 * @param jobVertices Job vertices involved in the checkpoints.
 * @param jobCheckpointingConfiguration Checkpointing configuration.
 * @param metricGroup Metric group for exposed metrics
 */
public CheckpointStatsTracker(
	int numRememberedCheckpoints,
	List<ExecutionJobVertex> jobVertices,
	CheckpointCoordinatorConfiguration jobCheckpointingConfiguration,
	MetricGroup metricGroup) {

	checkArgument(numRememberedCheckpoints >= 0, "Negative number of remembered checkpoints");
	this.history = new CheckpointStatsHistory(numRememberedCheckpoints);
	this.jobVertices = checkNotNull(jobVertices, "JobVertices");
	this.jobCheckpointingConfiguration = checkNotNull(jobCheckpointingConfiguration);

	// Compute the total subtask count. We do this here in order to only
	// do it once.
	int count = 0;
	for (ExecutionJobVertex vertex : jobVertices) {
		count += vertex.getParallelism();
	}
	this.totalSubtaskCount = count;

	// Latest snapshot is empty
	latestSnapshot = new CheckpointStatsSnapshot(
		counts.createSnapshot(),
		summary.createSnapshot(),
		history.createSnapshot(),
		null);

	// Register the metrics
	registerMetrics(metricGroup);
}
 

private CheckpointCoordinator instantiateCheckpointCoordinator(
	JobID jid,
	ScheduledExecutor testingScheduledExecutor,
	ExecutionVertex... ackVertices) {

	CheckpointCoordinatorConfiguration chkConfig = new CheckpointCoordinatorConfiguration(
		10000000L,
		600000L,
		0L,
		1,
		CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
		true,
		false,
		false,
		0);
	return new CheckpointCoordinator(
			jid,
			chkConfig,
			new ExecutionVertex[0],
			ackVertices,
			new ExecutionVertex[0],
			Collections.emptyList(),
			new StandaloneCheckpointIDCounter(),
			new StandaloneCompletedCheckpointStore(10),
			new MemoryStateBackend(),
			Executors.directExecutor(),
			testingScheduledExecutor,
			SharedStateRegistry.DEFAULT_FACTORY,
			new CheckpointFailureManager(
				0,
				NoOpFailJobCall.INSTANCE));
}
 

@Override
public CheckpointCoordinatorConfiguration getCheckpointCoordinatorConfiguration() {
	if (checkpointStatsTracker != null) {
		return checkpointStatsTracker.getJobCheckpointingConfiguration();
	} else {
		return null;
	}
}
 

public ArchivedExecutionGraph(
		JobID jobID,
		String jobName,
		Map<JobVertexID, ArchivedExecutionJobVertex> tasks,
		List<ArchivedExecutionJobVertex> verticesInCreationOrder,
		long[] stateTimestamps,
		JobStatus state,
		@Nullable ErrorInfo failureCause,
		String jsonPlan,
		StringifiedAccumulatorResult[] archivedUserAccumulators,
		Map<String, SerializedValue<OptionalFailure<Object>>> serializedUserAccumulators,
		ArchivedExecutionConfig executionConfig,
		boolean isStoppable,
		@Nullable CheckpointCoordinatorConfiguration jobCheckpointingConfiguration,
		@Nullable CheckpointStatsSnapshot checkpointStatsSnapshot) {

	this.jobID = Preconditions.checkNotNull(jobID);
	this.jobName = Preconditions.checkNotNull(jobName);
	this.tasks = Preconditions.checkNotNull(tasks);
	this.verticesInCreationOrder = Preconditions.checkNotNull(verticesInCreationOrder);
	this.stateTimestamps = Preconditions.checkNotNull(stateTimestamps);
	this.state = Preconditions.checkNotNull(state);
	this.failureCause = failureCause;
	this.jsonPlan = Preconditions.checkNotNull(jsonPlan);
	this.archivedUserAccumulators = Preconditions.checkNotNull(archivedUserAccumulators);
	this.serializedUserAccumulators = Preconditions.checkNotNull(serializedUserAccumulators);
	this.archivedExecutionConfig = Preconditions.checkNotNull(executionConfig);
	this.isStoppable = isStoppable;
	this.jobCheckpointingConfiguration = jobCheckpointingConfiguration;
	this.checkpointStatsSnapshot = checkpointStatsSnapshot;
}
 

/**
 * Tests access to the snapshotting settings.
 */
@Test
public void testGetSnapshottingSettings() throws Exception {
	ExecutionJobVertex jobVertex = mock(ExecutionJobVertex.class);
	when(jobVertex.getJobVertexId()).thenReturn(new JobVertexID());
	when(jobVertex.getParallelism()).thenReturn(1);

	JobCheckpointingSettings snapshottingSettings = new JobCheckpointingSettings(
		Collections.singletonList(new JobVertexID()),
		Collections.singletonList(new JobVertexID()),
		Collections.singletonList(new JobVertexID()),
		new CheckpointCoordinatorConfiguration(
			181238123L,
			19191992L,
			191929L,
			123,
			CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
			false
		),
		null);

	CheckpointStatsTracker tracker = new CheckpointStatsTracker(
		0,
		Collections.singletonList(jobVertex),
		snapshottingSettings.getCheckpointCoordinatorConfiguration(),
		new UnregisteredMetricsGroup());

	assertEquals(snapshottingSettings.getCheckpointCoordinatorConfiguration(), tracker.getJobCheckpointingConfiguration());
}
 

/**
 * Creates a "disabled" checkpoint tracker for tests.
 */
static CheckpointStatsTracker createTestTracker() {
	ExecutionJobVertex jobVertex = mock(ExecutionJobVertex.class);
	when(jobVertex.getJobVertexId()).thenReturn(new JobVertexID());
	when(jobVertex.getParallelism()).thenReturn(1);

	return new CheckpointStatsTracker(
		0,
		Collections.singletonList(jobVertex),
		mock(CheckpointCoordinatorConfiguration.class),
		new UnregisteredMetricsGroup());
}
 

private ExecutionGraph createExecutionGraph(Configuration configuration) throws Exception {
	final ScheduledExecutorService executor = TestingUtils.defaultExecutor();

	final JobID jobId = new JobID();
	final JobGraph jobGraph = new JobGraph(jobId, "test");
	jobGraph.setSnapshotSettings(
		new JobCheckpointingSettings(
			Collections.<JobVertexID>emptyList(),
			Collections.<JobVertexID>emptyList(),
			Collections.<JobVertexID>emptyList(),
			new CheckpointCoordinatorConfiguration(
				100,
				10 * 60 * 1000,
				0,
				1,
				CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
				false),
			null));

	final Time timeout = Time.seconds(10L);
	return ExecutionGraphBuilder.buildGraph(
		null,
		jobGraph,
		configuration,
		executor,
		executor,
		new ProgrammedSlotProvider(1),
		getClass().getClassLoader(),
		new StandaloneCheckpointRecoveryFactory(),
		timeout,
		new NoRestartStrategy(),
		new UnregisteredMetricsGroup(),
		1,
		blobWriter,
		timeout,
		LoggerFactory.getLogger(getClass()));
}
 

/**
 * Creates a new checkpoint stats tracker.
 *
 * @param numRememberedCheckpoints Maximum number of checkpoints to remember, including in progress ones.
 * @param jobVertices Job vertices involved in the checkpoints.
 * @param jobCheckpointingConfiguration Checkpointing configuration.
 * @param metricGroup Metric group for exposed metrics
 */
public CheckpointStatsTracker(
	int numRememberedCheckpoints,
	List<ExecutionJobVertex> jobVertices,
	CheckpointCoordinatorConfiguration jobCheckpointingConfiguration,
	MetricGroup metricGroup) {

	checkArgument(numRememberedCheckpoints >= 0, "Negative number of remembered checkpoints");
	this.history = new CheckpointStatsHistory(numRememberedCheckpoints);
	this.jobVertices = checkNotNull(jobVertices, "JobVertices");
	this.jobCheckpointingConfiguration = checkNotNull(jobCheckpointingConfiguration);

	// Compute the total subtask count. We do this here in order to only
	// do it once.
	int count = 0;
	for (ExecutionJobVertex vertex : jobVertices) {
		count += vertex.getParallelism();
	}
	this.totalSubtaskCount = count;

	// Latest snapshot is empty
	latestSnapshot = new CheckpointStatsSnapshot(
		counts.createSnapshot(),
		summary.createSnapshot(),
		history.createSnapshot(),
		null);

	// Register the metrics
	registerMetrics(metricGroup);
}
 

@Override
public CheckpointCoordinatorConfiguration getCheckpointCoordinatorConfiguration() {
	if (checkpointStatsTracker != null) {
		return checkpointStatsTracker.getJobCheckpointingConfiguration();
	} else {
		return null;
	}
}
 

public ArchivedExecutionGraph(
		JobID jobID,
		String jobName,
		Map<JobVertexID, ArchivedExecutionJobVertex> tasks,
		List<ArchivedExecutionJobVertex> verticesInCreationOrder,
		long[] stateTimestamps,
		JobStatus state,
		@Nullable ErrorInfo failureCause,
		String jsonPlan,
		StringifiedAccumulatorResult[] archivedUserAccumulators,
		Map<String, SerializedValue<OptionalFailure<Object>>> serializedUserAccumulators,
		ArchivedExecutionConfig executionConfig,
		boolean isStoppable,
		@Nullable CheckpointCoordinatorConfiguration jobCheckpointingConfiguration,
		@Nullable CheckpointStatsSnapshot checkpointStatsSnapshot) {

	this.jobID = Preconditions.checkNotNull(jobID);
	this.jobName = Preconditions.checkNotNull(jobName);
	this.tasks = Preconditions.checkNotNull(tasks);
	this.verticesInCreationOrder = Preconditions.checkNotNull(verticesInCreationOrder);
	this.stateTimestamps = Preconditions.checkNotNull(stateTimestamps);
	this.state = Preconditions.checkNotNull(state);
	this.failureCause = failureCause;
	this.jsonPlan = Preconditions.checkNotNull(jsonPlan);
	this.archivedUserAccumulators = Preconditions.checkNotNull(archivedUserAccumulators);
	this.serializedUserAccumulators = Preconditions.checkNotNull(serializedUserAccumulators);
	this.archivedExecutionConfig = Preconditions.checkNotNull(executionConfig);
	this.isStoppable = isStoppable;
	this.jobCheckpointingConfiguration = jobCheckpointingConfiguration;
	this.checkpointStatsSnapshot = checkpointStatsSnapshot;
}
 

/**
 * Tests that no minimum delay between savepoints is enforced.
 */
@Test
public void testMinDelayBetweenSavepoints() throws Exception {
	JobID jobId = new JobID();

	final ExecutionAttemptID attemptID1 = new ExecutionAttemptID();
	ExecutionVertex vertex1 = mockExecutionVertex(attemptID1);

	CheckpointCoordinatorConfiguration chkConfig = new CheckpointCoordinatorConfiguration(
		100000,
		200000,
		100000000L, // very long min delay => should not affect savepoints
		1,
		CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
		true,
		false,
		0);
	CheckpointCoordinator coord = new CheckpointCoordinator(
		jobId,
		chkConfig,
		new ExecutionVertex[] { vertex1 },
		new ExecutionVertex[] { vertex1 },
		new ExecutionVertex[] { vertex1 },
		new StandaloneCheckpointIDCounter(),
		new StandaloneCompletedCheckpointStore(2),
		new MemoryStateBackend(),
		Executors.directExecutor(),
		SharedStateRegistry.DEFAULT_FACTORY,
		failureManager);

	String savepointDir = tmpFolder.newFolder().getAbsolutePath();

	CompletableFuture<CompletedCheckpoint> savepoint0 = coord.triggerSavepoint(0, savepointDir);
	assertFalse("Did not trigger savepoint", savepoint0.isDone());

	CompletableFuture<CompletedCheckpoint> savepoint1 = coord.triggerSavepoint(1, savepointDir);
	assertFalse("Did not trigger savepoint", savepoint1.isDone());
}
 

private CheckpointCoordinator getCheckpointCoordinator(
		final JobID jobId,
		final ExecutionVertex vertex1,
		final ExecutionVertex vertex2,
		final CheckpointFailureManager failureManager) {

	final CheckpointCoordinatorConfiguration chkConfig = new CheckpointCoordinatorConfiguration(
			600000,
			600000,
			0,
			Integer.MAX_VALUE,
			CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
			true,
			false,
			0);

	return new CheckpointCoordinator(
			jobId,
			chkConfig,
			new ExecutionVertex[]{vertex1, vertex2},
			new ExecutionVertex[]{vertex1, vertex2},
			new ExecutionVertex[]{vertex1, vertex2},
			new StandaloneCheckpointIDCounter(),
			new StandaloneCompletedCheckpointStore(1),
			new MemoryStateBackend(),
			Executors.directExecutor(),
			SharedStateRegistry.DEFAULT_FACTORY,
			failureManager);
}
 

/**
 * Tests access to the snapshotting settings.
 */
@Test
public void testGetSnapshottingSettings() throws Exception {
	ExecutionJobVertex jobVertex = mock(ExecutionJobVertex.class);
	when(jobVertex.getJobVertexId()).thenReturn(new JobVertexID());
	when(jobVertex.getParallelism()).thenReturn(1);

	JobCheckpointingSettings snapshottingSettings = new JobCheckpointingSettings(
		Collections.singletonList(new JobVertexID()),
		Collections.singletonList(new JobVertexID()),
		Collections.singletonList(new JobVertexID()),
		new CheckpointCoordinatorConfiguration(
			181238123L,
			19191992L,
			191929L,
			123,
			CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
			false,
			false,
			0
		),
		null);

	CheckpointStatsTracker tracker = new CheckpointStatsTracker(
		0,
		Collections.singletonList(jobVertex),
		snapshottingSettings.getCheckpointCoordinatorConfiguration(),
		new UnregisteredMetricsGroup());

	assertEquals(snapshottingSettings.getCheckpointCoordinatorConfiguration(), tracker.getJobCheckpointingConfiguration());
}
 

/**
 * Creates a "disabled" checkpoint tracker for tests.
 */
static CheckpointStatsTracker createTestTracker() {
	ExecutionJobVertex jobVertex = mock(ExecutionJobVertex.class);
	when(jobVertex.getJobVertexId()).thenReturn(new JobVertexID());
	when(jobVertex.getParallelism()).thenReturn(1);

	return new CheckpointStatsTracker(
		0,
		Collections.singletonList(jobVertex),
		mock(CheckpointCoordinatorConfiguration.class),
		new UnregisteredMetricsGroup());
}
 

private ExecutionGraph createExecutionGraphAndEnableCheckpointing(
		CheckpointIDCounter counter,
		CompletedCheckpointStore store) throws Exception {
	final Time timeout = Time.days(1L);

	JobVertex jobVertex = new JobVertex("MockVertex");
	jobVertex.setInvokableClass(AbstractInvokable.class);

	final ExecutionGraph executionGraph = new ExecutionGraphTestUtils.TestingExecutionGraphBuilder(jobVertex)
		.setRpcTimeout(timeout)
		.setAllocationTimeout(timeout)
		.allowQueuedScheduling()
		.build();

	executionGraph.start(ComponentMainThreadExecutorServiceAdapter.forMainThread());

	CheckpointCoordinatorConfiguration chkConfig = new CheckpointCoordinatorConfiguration(
		100,
		100,
		100,
		1,
		CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
		true,
		false,
		0);

	executionGraph.enableCheckpointing(
			chkConfig,
			Collections.emptyList(),
			Collections.emptyList(),
			Collections.emptyList(),
			Collections.emptyList(),
			counter,
			store,
			new MemoryStateBackend(),
			CheckpointStatsTrackerTest.createTestTracker());

	return executionGraph;
}
 

private ExecutionGraph createExecutionGraph(Configuration configuration) throws Exception {
	final ScheduledExecutorService executor = TestingUtils.defaultExecutor();

	final JobID jobId = new JobID();
	final JobGraph jobGraph = new JobGraph(jobId, "test");
	jobGraph.setSnapshotSettings(
		new JobCheckpointingSettings(
			Collections.<JobVertexID>emptyList(),
			Collections.<JobVertexID>emptyList(),
			Collections.<JobVertexID>emptyList(),
			new CheckpointCoordinatorConfiguration(
				100,
				10 * 60 * 1000,
				0,
				1,
				CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
				false,
				false,
				0),
			null));

	final Time timeout = Time.seconds(10L);
	return ExecutionGraphBuilder.buildGraph(
		null,
		jobGraph,
		configuration,
		executor,
		executor,
		new ProgrammedSlotProvider(1),
		getClass().getClassLoader(),
		new StandaloneCheckpointRecoveryFactory(),
		timeout,
		new NoRestartStrategy(),
		new UnregisteredMetricsGroup(),
		blobWriter,
		timeout,
		LoggerFactory.getLogger(getClass()),
		NettyShuffleMaster.INSTANCE,
		NoOpPartitionTracker.INSTANCE);
}
 

private static void enableCheckpointing(final ExecutionGraph executionGraph) {
	final List<ExecutionJobVertex> jobVertices = new ArrayList<>(executionGraph.getAllVertices().values());
	final CheckpointCoordinatorConfiguration checkpointCoordinatorConfiguration = new CheckpointCoordinatorConfiguration(
		Long.MAX_VALUE,
		Long.MAX_VALUE,
		0,
		1,
		CheckpointRetentionPolicy.RETAIN_ON_CANCELLATION,
		true,
		false,
		0);

	executionGraph.enableCheckpointing(
		checkpointCoordinatorConfiguration,
		jobVertices,
		jobVertices,
		jobVertices,
		Collections.emptyList(),
		new StandaloneCheckpointIDCounter(),
		new StandaloneCompletedCheckpointStore(1),
		new MemoryStateBackend(),
		new CheckpointStatsTracker(
			0,
			jobVertices,
			checkpointCoordinatorConfiguration,
			new UnregisteredMetricsGroup()));
}
 

public CheckpointCoordinator(
	JobID job,
	CheckpointCoordinatorConfiguration chkConfig,
	ExecutionVertex[] tasksToTrigger,
	ExecutionVertex[] tasksToWaitFor,
	ExecutionVertex[] tasksToCommitTo,
	Collection<OperatorCoordinatorCheckpointContext> coordinatorsToCheckpoint,
	CheckpointIDCounter checkpointIDCounter,
	CompletedCheckpointStore completedCheckpointStore,
	StateBackend checkpointStateBackend,
	Executor executor,
	ScheduledExecutor timer,
	SharedStateRegistryFactory sharedStateRegistryFactory,
	CheckpointFailureManager failureManager) {

	this(
		job,
		chkConfig,
		tasksToTrigger,
		tasksToWaitFor,
		tasksToCommitTo,
		coordinatorsToCheckpoint,
		checkpointIDCounter,
		completedCheckpointStore,
		checkpointStateBackend,
		executor,
		timer,
		sharedStateRegistryFactory,
		failureManager,
		SystemClock.getInstance());
}
 

/**
 * Creates a new checkpoint stats tracker.
 *
 * @param numRememberedCheckpoints Maximum number of checkpoints to remember, including in progress ones.
 * @param jobVertices Job vertices involved in the checkpoints.
 * @param jobCheckpointingConfiguration Checkpointing configuration.
 * @param metricGroup Metric group for exposed metrics
 */
public CheckpointStatsTracker(
	int numRememberedCheckpoints,
	List<ExecutionJobVertex> jobVertices,
	CheckpointCoordinatorConfiguration jobCheckpointingConfiguration,
	MetricGroup metricGroup) {

	checkArgument(numRememberedCheckpoints >= 0, "Negative number of remembered checkpoints");
	this.history = new CheckpointStatsHistory(numRememberedCheckpoints);
	this.jobVertices = checkNotNull(jobVertices, "JobVertices");
	this.jobCheckpointingConfiguration = checkNotNull(jobCheckpointingConfiguration);

	// Compute the total subtask count. We do this here in order to only
	// do it once.
	int count = 0;
	for (ExecutionJobVertex vertex : jobVertices) {
		count += vertex.getParallelism();
	}
	this.totalSubtaskCount = count;

	// Latest snapshot is empty
	latestSnapshot = new CheckpointStatsSnapshot(
		counts.createSnapshot(),
		summary.createSnapshot(),
		history.createSnapshot(),
		null);

	// Register the metrics
	registerMetrics(metricGroup);
}
 

@Override
public CheckpointCoordinatorConfiguration getCheckpointCoordinatorConfiguration() {
	if (checkpointStatsTracker != null) {
		return checkpointStatsTracker.getJobCheckpointingConfiguration();
	} else {
		return null;
	}
}
 

public static void enableCheckpointing(final JobGraph jobGraph, @Nullable StateBackend stateBackend) {
	final List<JobVertexID> triggerVertices = new ArrayList<>();
	final List<JobVertexID> allVertices = new ArrayList<>();

	for (JobVertex vertex : jobGraph.getVertices()) {
		if (vertex.isInputVertex()) {
			triggerVertices.add(vertex.getID());
		}
		allVertices.add(vertex.getID());
	}

	final CheckpointCoordinatorConfiguration config = new CheckpointCoordinatorConfiguration(
		Long.MAX_VALUE, // disable periodical checkpointing
		DEFAULT_CHECKPOINT_TIMEOUT_MS,
		0,
		1,
		CheckpointRetentionPolicy.NEVER_RETAIN_AFTER_TERMINATION,
		false,
		false,
		false,
		0);

	SerializedValue<StateBackend> serializedStateBackend = null;
	if (stateBackend != null) {
		try {
			serializedStateBackend = new SerializedValue<>(stateBackend);
		} catch (IOException e) {
			throw new RuntimeException("could not serialize state backend", e);
		}
	}

	jobGraph.setSnapshotSettings(new JobCheckpointingSettings(
			triggerVertices, allVertices, allVertices,
			config, serializedStateBackend));
}
 

/**
 * Tests that the externalized checkpoint configuration is respected.
 */
@Test
public void testExternalizedCheckpoints() throws Exception {
	try {

		// set up the coordinator and validate the initial state
		CheckpointCoordinatorConfiguration chkConfig =
			new CheckpointCoordinatorConfigurationBuilder()
				.setCheckpointRetentionPolicy(CheckpointRetentionPolicy.RETAIN_ON_FAILURE)
				.build();
		CheckpointCoordinator coord =
			new CheckpointCoordinatorBuilder()
				.setCheckpointCoordinatorConfiguration(chkConfig)
				.setTimer(manuallyTriggeredScheduledExecutor)
				.build();

		CompletableFuture<CompletedCheckpoint> checkpointFuture =
			coord.triggerCheckpoint(false);
		manuallyTriggeredScheduledExecutor.triggerAll();
		assertFalse(checkpointFuture.isCompletedExceptionally());

		for (PendingCheckpoint checkpoint : coord.getPendingCheckpoints().values()) {
			CheckpointProperties props = checkpoint.getProps();
			CheckpointProperties expected = CheckpointProperties.forCheckpoint(CheckpointRetentionPolicy.RETAIN_ON_FAILURE);

			assertEquals(expected, props);
		}

		// the now we should have a completed checkpoint
		coord.shutdown(JobStatus.FINISHED);
	}
	catch (Exception e) {
		e.printStackTrace();
		fail(e.getMessage());
	}
}