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Example 1 with ResultPartitionConsumableNotifier

use of org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier in project flink by apache.

the class StreamTaskTest method createTask.

public static Task createTask(Class<? extends AbstractInvokable> invokable, StreamConfig taskConfig, Configuration taskManagerConfig) throws Exception {
    LibraryCacheManager libCache = mock(LibraryCacheManager.class);
    when(libCache.getClassLoader(any(JobID.class))).thenReturn(StreamTaskTest.class.getClassLoader());
    ResultPartitionManager partitionManager = mock(ResultPartitionManager.class);
    ResultPartitionConsumableNotifier consumableNotifier = mock(ResultPartitionConsumableNotifier.class);
    PartitionProducerStateChecker partitionProducerStateChecker = mock(PartitionProducerStateChecker.class);
    Executor executor = mock(Executor.class);
    NetworkEnvironment network = mock(NetworkEnvironment.class);
    when(network.getResultPartitionManager()).thenReturn(partitionManager);
    when(network.getDefaultIOMode()).thenReturn(IOManager.IOMode.SYNC);
    when(network.createKvStateTaskRegistry(any(JobID.class), any(JobVertexID.class))).thenReturn(mock(TaskKvStateRegistry.class));
    JobInformation jobInformation = new JobInformation(new JobID(), "Job Name", new SerializedValue<>(new ExecutionConfig()), new Configuration(), Collections.<BlobKey>emptyList(), Collections.<URL>emptyList());
    TaskInformation taskInformation = new TaskInformation(new JobVertexID(), "Test Task", 1, 1, invokable.getName(), taskConfig.getConfiguration());
    return new Task(jobInformation, taskInformation, new ExecutionAttemptID(), new AllocationID(), 0, 0, Collections.<ResultPartitionDeploymentDescriptor>emptyList(), Collections.<InputGateDeploymentDescriptor>emptyList(), 0, new TaskStateHandles(), mock(MemoryManager.class), mock(IOManager.class), network, mock(BroadcastVariableManager.class), mock(TaskManagerActions.class), mock(InputSplitProvider.class), mock(CheckpointResponder.class), libCache, mock(FileCache.class), new TestingTaskManagerRuntimeInfo(taskManagerConfig, new String[] { System.getProperty("java.io.tmpdir") }), new UnregisteredTaskMetricsGroup(), consumableNotifier, partitionProducerStateChecker, executor);
}
Also used : Task(org.apache.flink.runtime.taskmanager.Task) Configuration(org.apache.flink.configuration.Configuration) JobVertexID(org.apache.flink.runtime.jobgraph.JobVertexID) TaskKvStateRegistry(org.apache.flink.runtime.query.TaskKvStateRegistry) ExecutionConfig(org.apache.flink.api.common.ExecutionConfig) Matchers.anyString(org.mockito.Matchers.anyString) TaskManagerActions(org.apache.flink.runtime.taskmanager.TaskManagerActions) Executor(java.util.concurrent.Executor) TestingTaskManagerRuntimeInfo(org.apache.flink.runtime.util.TestingTaskManagerRuntimeInfo) BroadcastVariableManager(org.apache.flink.runtime.broadcast.BroadcastVariableManager) PartitionProducerStateChecker(org.apache.flink.runtime.io.network.netty.PartitionProducerStateChecker) ResultPartitionConsumableNotifier(org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier) InputSplitProvider(org.apache.flink.runtime.jobgraph.tasks.InputSplitProvider) UnregisteredTaskMetricsGroup(org.apache.flink.runtime.operators.testutils.UnregisteredTaskMetricsGroup) JobInformation(org.apache.flink.runtime.executiongraph.JobInformation) TaskInformation(org.apache.flink.runtime.executiongraph.TaskInformation) ExecutionAttemptID(org.apache.flink.runtime.executiongraph.ExecutionAttemptID) IOManager(org.apache.flink.runtime.io.disk.iomanager.IOManager) CheckpointResponder(org.apache.flink.runtime.taskmanager.CheckpointResponder) AllocationID(org.apache.flink.runtime.clusterframework.types.AllocationID) LibraryCacheManager(org.apache.flink.runtime.execution.librarycache.LibraryCacheManager) ResultPartitionManager(org.apache.flink.runtime.io.network.partition.ResultPartitionManager) MemoryManager(org.apache.flink.runtime.memory.MemoryManager) FileCache(org.apache.flink.runtime.filecache.FileCache) TaskStateHandles(org.apache.flink.runtime.state.TaskStateHandles) NetworkEnvironment(org.apache.flink.runtime.io.network.NetworkEnvironment) JobID(org.apache.flink.api.common.JobID)

Example 2 with ResultPartitionConsumableNotifier

use of org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier in project flink by apache.

the class TaskAsyncCallTest method createTask.

private static Task createTask() throws Exception {
    LibraryCacheManager libCache = mock(LibraryCacheManager.class);
    when(libCache.getClassLoader(any(JobID.class))).thenReturn(ClassLoader.getSystemClassLoader());
    ResultPartitionManager partitionManager = mock(ResultPartitionManager.class);
    ResultPartitionConsumableNotifier consumableNotifier = mock(ResultPartitionConsumableNotifier.class);
    PartitionProducerStateChecker partitionProducerStateChecker = mock(PartitionProducerStateChecker.class);
    Executor executor = mock(Executor.class);
    NetworkEnvironment networkEnvironment = mock(NetworkEnvironment.class);
    when(networkEnvironment.getResultPartitionManager()).thenReturn(partitionManager);
    when(networkEnvironment.getDefaultIOMode()).thenReturn(IOManager.IOMode.SYNC);
    when(networkEnvironment.createKvStateTaskRegistry(any(JobID.class), any(JobVertexID.class))).thenReturn(mock(TaskKvStateRegistry.class));
    JobInformation jobInformation = new JobInformation(new JobID(), "Job Name", new SerializedValue<>(new ExecutionConfig()), new Configuration(), Collections.<BlobKey>emptyList(), Collections.<URL>emptyList());
    TaskInformation taskInformation = new TaskInformation(new JobVertexID(), "Test Task", 1, 1, CheckpointsInOrderInvokable.class.getName(), new Configuration());
    return new Task(jobInformation, taskInformation, new ExecutionAttemptID(), new AllocationID(), 0, 0, Collections.<ResultPartitionDeploymentDescriptor>emptyList(), Collections.<InputGateDeploymentDescriptor>emptyList(), 0, new TaskStateHandles(), mock(MemoryManager.class), mock(IOManager.class), networkEnvironment, mock(BroadcastVariableManager.class), mock(TaskManagerActions.class), mock(InputSplitProvider.class), mock(CheckpointResponder.class), libCache, mock(FileCache.class), new TestingTaskManagerRuntimeInfo(), mock(TaskMetricGroup.class), consumableNotifier, partitionProducerStateChecker, executor);
}
Also used : StatefulTask(org.apache.flink.runtime.jobgraph.tasks.StatefulTask) Configuration(org.apache.flink.configuration.Configuration) JobVertexID(org.apache.flink.runtime.jobgraph.JobVertexID) TaskKvStateRegistry(org.apache.flink.runtime.query.TaskKvStateRegistry) ExecutionConfig(org.apache.flink.api.common.ExecutionConfig) Executor(java.util.concurrent.Executor) TestingTaskManagerRuntimeInfo(org.apache.flink.runtime.util.TestingTaskManagerRuntimeInfo) BroadcastVariableManager(org.apache.flink.runtime.broadcast.BroadcastVariableManager) PartitionProducerStateChecker(org.apache.flink.runtime.io.network.netty.PartitionProducerStateChecker) ResultPartitionConsumableNotifier(org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier) InputSplitProvider(org.apache.flink.runtime.jobgraph.tasks.InputSplitProvider) JobInformation(org.apache.flink.runtime.executiongraph.JobInformation) TaskInformation(org.apache.flink.runtime.executiongraph.TaskInformation) ExecutionAttemptID(org.apache.flink.runtime.executiongraph.ExecutionAttemptID) IOManager(org.apache.flink.runtime.io.disk.iomanager.IOManager) TaskMetricGroup(org.apache.flink.runtime.metrics.groups.TaskMetricGroup) AllocationID(org.apache.flink.runtime.clusterframework.types.AllocationID) LibraryCacheManager(org.apache.flink.runtime.execution.librarycache.LibraryCacheManager) ResultPartitionManager(org.apache.flink.runtime.io.network.partition.ResultPartitionManager) MemoryManager(org.apache.flink.runtime.memory.MemoryManager) FileCache(org.apache.flink.runtime.filecache.FileCache) TaskStateHandles(org.apache.flink.runtime.state.TaskStateHandles) NetworkEnvironment(org.apache.flink.runtime.io.network.NetworkEnvironment) JobID(org.apache.flink.api.common.JobID)

Example 3 with ResultPartitionConsumableNotifier

use of org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier in project flink by apache.

the class TaskTest method createTask.

private Task createTask(Class<? extends AbstractInvokable> invokable, LibraryCacheManager libCache, Configuration config, ExecutionConfig execConfig) throws IOException {
    ResultPartitionManager partitionManager = mock(ResultPartitionManager.class);
    ResultPartitionConsumableNotifier consumableNotifier = mock(ResultPartitionConsumableNotifier.class);
    PartitionProducerStateChecker partitionProducerStateChecker = mock(PartitionProducerStateChecker.class);
    Executor executor = mock(Executor.class);
    NetworkEnvironment network = mock(NetworkEnvironment.class);
    when(network.getResultPartitionManager()).thenReturn(partitionManager);
    when(network.getDefaultIOMode()).thenReturn(IOManager.IOMode.SYNC);
    when(network.createKvStateTaskRegistry(any(JobID.class), any(JobVertexID.class))).thenReturn(mock(TaskKvStateRegistry.class));
    return createTask(invokable, libCache, network, consumableNotifier, partitionProducerStateChecker, executor, config, execConfig);
}
Also used : Executor(java.util.concurrent.Executor) JobVertexID(org.apache.flink.runtime.jobgraph.JobVertexID) NetworkEnvironment(org.apache.flink.runtime.io.network.NetworkEnvironment) TaskKvStateRegistry(org.apache.flink.runtime.query.TaskKvStateRegistry) PartitionProducerStateChecker(org.apache.flink.runtime.io.network.netty.PartitionProducerStateChecker) ResultPartitionManager(org.apache.flink.runtime.io.network.partition.ResultPartitionManager) ResultPartitionConsumableNotifier(org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier) JobID(org.apache.flink.api.common.JobID)

Example 4 with ResultPartitionConsumableNotifier

use of org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier in project flink by apache.

the class TaskExecutor method submitTask.

// ----------------------------------------------------------------------
// Task lifecycle RPCs
// ----------------------------------------------------------------------
@Override
public CompletableFuture<Acknowledge> submitTask(TaskDeploymentDescriptor tdd, JobMasterId jobMasterId, Time timeout) {
    try {
        final JobID jobId = tdd.getJobId();
        final ExecutionAttemptID executionAttemptID = tdd.getExecutionAttemptId();
        final JobTable.Connection jobManagerConnection = jobTable.getConnection(jobId).orElseThrow(() -> {
            final String message = "Could not submit task because there is no JobManager " + "associated for the job " + jobId + '.';
            log.debug(message);
            return new TaskSubmissionException(message);
        });
        if (!Objects.equals(jobManagerConnection.getJobMasterId(), jobMasterId)) {
            final String message = "Rejecting the task submission because the job manager leader id " + jobMasterId + " does not match the expected job manager leader id " + jobManagerConnection.getJobMasterId() + '.';
            log.debug(message);
            throw new TaskSubmissionException(message);
        }
        if (!taskSlotTable.tryMarkSlotActive(jobId, tdd.getAllocationId())) {
            final String message = "No task slot allocated for job ID " + jobId + " and allocation ID " + tdd.getAllocationId() + '.';
            log.debug(message);
            throw new TaskSubmissionException(message);
        }
        // re-integrate offloaded data:
        try {
            tdd.loadBigData(taskExecutorBlobService.getPermanentBlobService());
        } catch (IOException | ClassNotFoundException e) {
            throw new TaskSubmissionException("Could not re-integrate offloaded TaskDeploymentDescriptor data.", e);
        }
        // deserialize the pre-serialized information
        final JobInformation jobInformation;
        final TaskInformation taskInformation;
        try {
            jobInformation = tdd.getSerializedJobInformation().deserializeValue(getClass().getClassLoader());
            taskInformation = tdd.getSerializedTaskInformation().deserializeValue(getClass().getClassLoader());
        } catch (IOException | ClassNotFoundException e) {
            throw new TaskSubmissionException("Could not deserialize the job or task information.", e);
        }
        if (!jobId.equals(jobInformation.getJobId())) {
            throw new TaskSubmissionException("Inconsistent job ID information inside TaskDeploymentDescriptor (" + tdd.getJobId() + " vs. " + jobInformation.getJobId() + ")");
        }
        TaskManagerJobMetricGroup jobGroup = taskManagerMetricGroup.addJob(jobInformation.getJobId(), jobInformation.getJobName());
        // note that a pre-existing job group can NOT be closed concurrently - this is done by
        // the same TM thread in removeJobMetricsGroup
        TaskMetricGroup taskMetricGroup = jobGroup.addTask(taskInformation.getJobVertexId(), tdd.getExecutionAttemptId(), taskInformation.getTaskName(), tdd.getSubtaskIndex(), tdd.getAttemptNumber());
        InputSplitProvider inputSplitProvider = new RpcInputSplitProvider(jobManagerConnection.getJobManagerGateway(), taskInformation.getJobVertexId(), tdd.getExecutionAttemptId(), taskManagerConfiguration.getRpcTimeout());
        final TaskOperatorEventGateway taskOperatorEventGateway = new RpcTaskOperatorEventGateway(jobManagerConnection.getJobManagerGateway(), executionAttemptID, (t) -> runAsync(() -> failTask(executionAttemptID, t)));
        TaskManagerActions taskManagerActions = jobManagerConnection.getTaskManagerActions();
        CheckpointResponder checkpointResponder = jobManagerConnection.getCheckpointResponder();
        GlobalAggregateManager aggregateManager = jobManagerConnection.getGlobalAggregateManager();
        LibraryCacheManager.ClassLoaderHandle classLoaderHandle = jobManagerConnection.getClassLoaderHandle();
        ResultPartitionConsumableNotifier resultPartitionConsumableNotifier = jobManagerConnection.getResultPartitionConsumableNotifier();
        PartitionProducerStateChecker partitionStateChecker = jobManagerConnection.getPartitionStateChecker();
        final TaskLocalStateStore localStateStore = localStateStoresManager.localStateStoreForSubtask(jobId, tdd.getAllocationId(), taskInformation.getJobVertexId(), tdd.getSubtaskIndex());
        // TODO: Pass config value from user program and do overriding here.
        final StateChangelogStorage<?> changelogStorage;
        try {
            changelogStorage = changelogStoragesManager.stateChangelogStorageForJob(jobId, taskManagerConfiguration.getConfiguration(), jobGroup);
        } catch (IOException e) {
            throw new TaskSubmissionException(e);
        }
        final JobManagerTaskRestore taskRestore = tdd.getTaskRestore();
        final TaskStateManager taskStateManager = new TaskStateManagerImpl(jobId, tdd.getExecutionAttemptId(), localStateStore, changelogStorage, taskRestore, checkpointResponder);
        MemoryManager memoryManager;
        try {
            memoryManager = taskSlotTable.getTaskMemoryManager(tdd.getAllocationId());
        } catch (SlotNotFoundException e) {
            throw new TaskSubmissionException("Could not submit task.", e);
        }
        Task task = new Task(jobInformation, taskInformation, tdd.getExecutionAttemptId(), tdd.getAllocationId(), tdd.getSubtaskIndex(), tdd.getAttemptNumber(), tdd.getProducedPartitions(), tdd.getInputGates(), memoryManager, taskExecutorServices.getIOManager(), taskExecutorServices.getShuffleEnvironment(), taskExecutorServices.getKvStateService(), taskExecutorServices.getBroadcastVariableManager(), taskExecutorServices.getTaskEventDispatcher(), externalResourceInfoProvider, taskStateManager, taskManagerActions, inputSplitProvider, checkpointResponder, taskOperatorEventGateway, aggregateManager, classLoaderHandle, fileCache, taskManagerConfiguration, taskMetricGroup, resultPartitionConsumableNotifier, partitionStateChecker, getRpcService().getScheduledExecutor());
        taskMetricGroup.gauge(MetricNames.IS_BACK_PRESSURED, task::isBackPressured);
        log.info("Received task {} ({}), deploy into slot with allocation id {}.", task.getTaskInfo().getTaskNameWithSubtasks(), tdd.getExecutionAttemptId(), tdd.getAllocationId());
        boolean taskAdded;
        try {
            taskAdded = taskSlotTable.addTask(task);
        } catch (SlotNotFoundException | SlotNotActiveException e) {
            throw new TaskSubmissionException("Could not submit task.", e);
        }
        if (taskAdded) {
            task.startTaskThread();
            setupResultPartitionBookkeeping(tdd.getJobId(), tdd.getProducedPartitions(), task.getTerminationFuture());
            return CompletableFuture.completedFuture(Acknowledge.get());
        } else {
            final String message = "TaskManager already contains a task for id " + task.getExecutionId() + '.';
            log.debug(message);
            throw new TaskSubmissionException(message);
        }
    } catch (TaskSubmissionException e) {
        return FutureUtils.completedExceptionally(e);
    }
}
Also used : SlotNotFoundException(org.apache.flink.runtime.taskexecutor.slot.SlotNotFoundException) TaskStateManagerImpl(org.apache.flink.runtime.state.TaskStateManagerImpl) Task(org.apache.flink.runtime.taskmanager.Task) SlotNotActiveException(org.apache.flink.runtime.taskexecutor.slot.SlotNotActiveException) RpcInputSplitProvider(org.apache.flink.runtime.taskexecutor.rpc.RpcInputSplitProvider) RpcTaskOperatorEventGateway(org.apache.flink.runtime.taskexecutor.rpc.RpcTaskOperatorEventGateway) TaskOperatorEventGateway(org.apache.flink.runtime.jobgraph.tasks.TaskOperatorEventGateway) JobManagerTaskRestore(org.apache.flink.runtime.checkpoint.JobManagerTaskRestore) RpcTaskOperatorEventGateway(org.apache.flink.runtime.taskexecutor.rpc.RpcTaskOperatorEventGateway) TaskManagerActions(org.apache.flink.runtime.taskmanager.TaskManagerActions) TaskSubmissionException(org.apache.flink.runtime.taskexecutor.exceptions.TaskSubmissionException) InputSplitProvider(org.apache.flink.runtime.jobgraph.tasks.InputSplitProvider) RpcInputSplitProvider(org.apache.flink.runtime.taskexecutor.rpc.RpcInputSplitProvider) ResultPartitionConsumableNotifier(org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier) RpcResultPartitionConsumableNotifier(org.apache.flink.runtime.taskexecutor.rpc.RpcResultPartitionConsumableNotifier) JobInformation(org.apache.flink.runtime.executiongraph.JobInformation) ExecutionAttemptID(org.apache.flink.runtime.executiongraph.ExecutionAttemptID) TaskInformation(org.apache.flink.runtime.executiongraph.TaskInformation) TaskLocalStateStore(org.apache.flink.runtime.state.TaskLocalStateStore) TaskMetricGroup(org.apache.flink.runtime.metrics.groups.TaskMetricGroup) RpcCheckpointResponder(org.apache.flink.runtime.taskexecutor.rpc.RpcCheckpointResponder) CheckpointResponder(org.apache.flink.runtime.taskmanager.CheckpointResponder) TaskManagerJobMetricGroup(org.apache.flink.runtime.metrics.groups.TaskManagerJobMetricGroup) IOException(java.io.IOException) LibraryCacheManager(org.apache.flink.runtime.execution.librarycache.LibraryCacheManager) TaskStateManager(org.apache.flink.runtime.state.TaskStateManager) MemoryManager(org.apache.flink.runtime.memory.MemoryManager) RpcGlobalAggregateManager(org.apache.flink.runtime.taskexecutor.rpc.RpcGlobalAggregateManager) JobID(org.apache.flink.api.common.JobID)

Example 5 with ResultPartitionConsumableNotifier

use of org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier in project flink by apache.

the class TaskExecutor method associateWithJobManager.

private JobTable.Connection associateWithJobManager(JobTable.Job job, ResourceID resourceID, JobMasterGateway jobMasterGateway) {
    checkNotNull(resourceID);
    checkNotNull(jobMasterGateway);
    TaskManagerActions taskManagerActions = new TaskManagerActionsImpl(jobMasterGateway);
    CheckpointResponder checkpointResponder = new RpcCheckpointResponder(jobMasterGateway);
    GlobalAggregateManager aggregateManager = new RpcGlobalAggregateManager(jobMasterGateway);
    ResultPartitionConsumableNotifier resultPartitionConsumableNotifier = new RpcResultPartitionConsumableNotifier(jobMasterGateway, getRpcService().getScheduledExecutor(), taskManagerConfiguration.getRpcTimeout());
    PartitionProducerStateChecker partitionStateChecker = new RpcPartitionStateChecker(jobMasterGateway);
    registerQueryableState(job.getJobId(), jobMasterGateway);
    return job.connect(resourceID, jobMasterGateway, taskManagerActions, checkpointResponder, aggregateManager, resultPartitionConsumableNotifier, partitionStateChecker);
}
Also used : RpcPartitionStateChecker(org.apache.flink.runtime.taskexecutor.rpc.RpcPartitionStateChecker) RpcGlobalAggregateManager(org.apache.flink.runtime.taskexecutor.rpc.RpcGlobalAggregateManager) RpcCheckpointResponder(org.apache.flink.runtime.taskexecutor.rpc.RpcCheckpointResponder) CheckpointResponder(org.apache.flink.runtime.taskmanager.CheckpointResponder) RpcCheckpointResponder(org.apache.flink.runtime.taskexecutor.rpc.RpcCheckpointResponder) RpcResultPartitionConsumableNotifier(org.apache.flink.runtime.taskexecutor.rpc.RpcResultPartitionConsumableNotifier) ResultPartitionConsumableNotifier(org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier) RpcResultPartitionConsumableNotifier(org.apache.flink.runtime.taskexecutor.rpc.RpcResultPartitionConsumableNotifier) RpcGlobalAggregateManager(org.apache.flink.runtime.taskexecutor.rpc.RpcGlobalAggregateManager) TaskManagerActions(org.apache.flink.runtime.taskmanager.TaskManagerActions)

Aggregations

ResultPartitionConsumableNotifier (org.apache.flink.runtime.io.network.partition.ResultPartitionConsumableNotifier)12 JobID (org.apache.flink.api.common.JobID)8 Executor (java.util.concurrent.Executor)6 LibraryCacheManager (org.apache.flink.runtime.execution.librarycache.LibraryCacheManager)6 JobInformation (org.apache.flink.runtime.executiongraph.JobInformation)6 TaskInformation (org.apache.flink.runtime.executiongraph.TaskInformation)6 PartitionProducerStateChecker (org.apache.flink.runtime.io.network.netty.PartitionProducerStateChecker)6 InputSplitProvider (org.apache.flink.runtime.jobgraph.tasks.InputSplitProvider)6 CheckpointResponder (org.apache.flink.runtime.taskmanager.CheckpointResponder)6 TaskManagerActions (org.apache.flink.runtime.taskmanager.TaskManagerActions)6 IOException (java.io.IOException)5 ExecutionConfig (org.apache.flink.api.common.ExecutionConfig)5 Configuration (org.apache.flink.configuration.Configuration)5 ExecutionAttemptID (org.apache.flink.runtime.executiongraph.ExecutionAttemptID)5 JobVertexID (org.apache.flink.runtime.jobgraph.JobVertexID)5 MemoryManager (org.apache.flink.runtime.memory.MemoryManager)5 TaskMetricGroup (org.apache.flink.runtime.metrics.groups.TaskMetricGroup)5 BroadcastVariableManager (org.apache.flink.runtime.broadcast.BroadcastVariableManager)4 AllocationID (org.apache.flink.runtime.clusterframework.types.AllocationID)4 FileCache (org.apache.flink.runtime.filecache.FileCache)4