Examples with StateBackend org.apache.flink.runtime.state.StateBackend used on opensource projects

Example 1 with StateBackend

use of org.apache.flink.runtime.state.StateBackend in project flink by apache.

the class ExecutionGraphBuilder method buildGraph.

/**
	 * Builds the ExecutionGraph from the JobGraph.
	 * If a prior execution graph exists, the JobGraph will be attached. If no prior execution
	 * graph exists, then the JobGraph will become attach to a new empty execution graph.
	 */
public static ExecutionGraph buildGraph(@Nullable ExecutionGraph prior, JobGraph jobGraph, Configuration jobManagerConfig, ScheduledExecutorService futureExecutor, Executor ioExecutor, SlotProvider slotProvider, ClassLoader classLoader, CheckpointRecoveryFactory recoveryFactory, Time timeout, RestartStrategy restartStrategy, MetricGroup metrics, int parallelismForAutoMax, Logger log) throws JobExecutionException, JobException {
    checkNotNull(jobGraph, "job graph cannot be null");
    final String jobName = jobGraph.getName();
    final JobID jobId = jobGraph.getJobID();
    // create a new execution graph, if none exists so far
    final ExecutionGraph executionGraph;
    try {
        executionGraph = (prior != null) ? prior : new ExecutionGraph(futureExecutor, ioExecutor, jobId, jobName, jobGraph.getJobConfiguration(), jobGraph.getSerializedExecutionConfig(), timeout, restartStrategy, jobGraph.getUserJarBlobKeys(), jobGraph.getClasspaths(), slotProvider, classLoader, metrics);
    } catch (IOException e) {
        throw new JobException("Could not create the execution graph.", e);
    }
    // set the basic properties
    executionGraph.setScheduleMode(jobGraph.getScheduleMode());
    executionGraph.setQueuedSchedulingAllowed(jobGraph.getAllowQueuedScheduling());
    try {
        executionGraph.setJsonPlan(JsonPlanGenerator.generatePlan(jobGraph));
    } catch (Throwable t) {
        log.warn("Cannot create JSON plan for job", t);
        // give the graph an empty plan
        executionGraph.setJsonPlan("{}");
    }
    // initialize the vertices that have a master initialization hook
    // file output formats create directories here, input formats create splits
    final long initMasterStart = System.nanoTime();
    log.info("Running initialization on master for job {} ({}).", jobName, jobId);
    for (JobVertex vertex : jobGraph.getVertices()) {
        String executableClass = vertex.getInvokableClassName();
        if (executableClass == null || executableClass.isEmpty()) {
            throw new JobSubmissionException(jobId, "The vertex " + vertex.getID() + " (" + vertex.getName() + ") has no invokable class.");
        }
        if (vertex.getParallelism() == ExecutionConfig.PARALLELISM_AUTO_MAX) {
            vertex.setParallelism(parallelismForAutoMax);
        }
        try {
            vertex.initializeOnMaster(classLoader);
        } catch (Throwable t) {
            throw new JobExecutionException(jobId, "Cannot initialize task '" + vertex.getName() + "': " + t.getMessage(), t);
        }
    }
    log.info("Successfully ran initialization on master in {} ms.", (System.nanoTime() - initMasterStart) / 1_000_000);
    // topologically sort the job vertices and attach the graph to the existing one
    List<JobVertex> sortedTopology = jobGraph.getVerticesSortedTopologicallyFromSources();
    if (log.isDebugEnabled()) {
        log.debug("Adding {} vertices from job graph {} ({}).", sortedTopology.size(), jobName, jobId);
    }
    executionGraph.attachJobGraph(sortedTopology);
    if (log.isDebugEnabled()) {
        log.debug("Successfully created execution graph from job graph {} ({}).", jobName, jobId);
    }
    // configure the state checkpointing
    JobSnapshottingSettings snapshotSettings = jobGraph.getSnapshotSettings();
    if (snapshotSettings != null) {
        List<ExecutionJobVertex> triggerVertices = idToVertex(snapshotSettings.getVerticesToTrigger(), executionGraph);
        List<ExecutionJobVertex> ackVertices = idToVertex(snapshotSettings.getVerticesToAcknowledge(), executionGraph);
        List<ExecutionJobVertex> confirmVertices = idToVertex(snapshotSettings.getVerticesToConfirm(), executionGraph);
        CompletedCheckpointStore completedCheckpoints;
        CheckpointIDCounter checkpointIdCounter;
        try {
            int maxNumberOfCheckpointsToRetain = jobManagerConfig.getInteger(CoreOptions.MAX_RETAINED_CHECKPOINTS);
            if (maxNumberOfCheckpointsToRetain <= 0) {
                // warning and use 1 as the default value if the setting in
                // state.checkpoints.max-retained-checkpoints is not greater than 0.
                log.warn("The setting for '{} : {}' is invalid. Using default value of {}", CoreOptions.MAX_RETAINED_CHECKPOINTS.key(), maxNumberOfCheckpointsToRetain, CoreOptions.MAX_RETAINED_CHECKPOINTS.defaultValue());
                maxNumberOfCheckpointsToRetain = CoreOptions.MAX_RETAINED_CHECKPOINTS.defaultValue();
            }
            completedCheckpoints = recoveryFactory.createCheckpointStore(jobId, maxNumberOfCheckpointsToRetain, classLoader);
            checkpointIdCounter = recoveryFactory.createCheckpointIDCounter(jobId);
        } catch (Exception e) {
            throw new JobExecutionException(jobId, "Failed to initialize high-availability checkpoint handler", e);
        }
        // Maximum number of remembered checkpoints
        int historySize = jobManagerConfig.getInteger(ConfigConstants.JOB_MANAGER_WEB_CHECKPOINTS_HISTORY_SIZE, ConfigConstants.DEFAULT_JOB_MANAGER_WEB_CHECKPOINTS_HISTORY_SIZE);
        CheckpointStatsTracker checkpointStatsTracker = new CheckpointStatsTracker(historySize, ackVertices, snapshotSettings, metrics);
        // The default directory for externalized checkpoints
        String externalizedCheckpointsDir = jobManagerConfig.getString(ConfigConstants.CHECKPOINTS_DIRECTORY_KEY, null);
        // load the state backend for checkpoint metadata.
        // if specified in the application, use from there, otherwise load from configuration
        final StateBackend metadataBackend;
        final StateBackend applicationConfiguredBackend = snapshotSettings.getDefaultStateBackend();
        if (applicationConfiguredBackend != null) {
            metadataBackend = applicationConfiguredBackend;
            log.info("Using application-defined state backend for checkpoint/savepoint metadata: {}.", applicationConfiguredBackend);
        } else {
            try {
                metadataBackend = AbstractStateBackend.loadStateBackendFromConfigOrCreateDefault(jobManagerConfig, classLoader, log);
            } catch (IllegalConfigurationException | IOException | DynamicCodeLoadingException e) {
                throw new JobExecutionException(jobId, "Could not instantiate configured state backend", e);
            }
        }
        executionGraph.enableCheckpointing(snapshotSettings.getCheckpointInterval(), snapshotSettings.getCheckpointTimeout(), snapshotSettings.getMinPauseBetweenCheckpoints(), snapshotSettings.getMaxConcurrentCheckpoints(), snapshotSettings.getExternalizedCheckpointSettings(), triggerVertices, ackVertices, confirmVertices, checkpointIdCounter, completedCheckpoints, externalizedCheckpointsDir, metadataBackend, checkpointStatsTracker);
    }
    return executionGraph;
}