Examples with Environment org.apache.flink.runtime.execution.Environment used on opensource projects

Example 26 with Environment

use of org.apache.flink.runtime.execution.Environment in project flink by apache.

the class Task method loadAndInstantiateInvokable.

/**
 * Instantiates the given task invokable class, passing the given environment (and possibly the
 * initial task state) to the task's constructor.
 *
 * <p>The method will first try to instantiate the task via a constructor accepting both the
 * Environment and the TaskStateSnapshot. If no such constructor exists, and there is no initial
 * state, the method will fall back to the stateless convenience constructor that accepts only
 * the Environment.
 *
 * @param classLoader The classloader to load the class through.
 * @param className The name of the class to load.
 * @param environment The task environment.
 * @return The instantiated invokable task object.
 * @throws Throwable Forwards all exceptions that happen during initialization of the task. Also
 *     throws an exception if the task class misses the necessary constructor.
 */
private static TaskInvokable loadAndInstantiateInvokable(ClassLoader classLoader, String className, Environment environment) throws Throwable {
    final Class<? extends TaskInvokable> invokableClass;
    try {
        invokableClass = Class.forName(className, true, classLoader).asSubclass(TaskInvokable.class);
    } catch (Throwable t) {
        throw new Exception("Could not load the task's invokable class.", t);
    }
    Constructor<? extends TaskInvokable> statelessCtor;
    try {
        statelessCtor = invokableClass.getConstructor(Environment.class);
    } catch (NoSuchMethodException ee) {
        throw new FlinkException("Task misses proper constructor", ee);
    }
    // instantiate the class
    try {
        // noinspection ConstantConditions  --> cannot happen
        return statelessCtor.newInstance(environment);
    } catch (InvocationTargetException e) {
        // directly forward exceptions from the eager initialization
        throw e.getTargetException();
    } catch (Exception e) {
        throw new FlinkException("Could not instantiate the task's invokable class.", e);
    }
}

Example 27 with Environment

use of org.apache.flink.runtime.execution.Environment in project flink by apache.

the class Task method doRun.

private void doRun() {
    // ----------------------------
    while (true) {
        ExecutionState current = this.executionState;
        if (current == ExecutionState.CREATED) {
            if (transitionState(ExecutionState.CREATED, ExecutionState.DEPLOYING)) {
                // success, we can start our work
                break;
            }
        } else if (current == ExecutionState.FAILED) {
            // we were immediately failed. tell the TaskManager that we reached our final state
            notifyFinalState();
            if (metrics != null) {
                metrics.close();
            }
            return;
        } else if (current == ExecutionState.CANCELING) {
            if (transitionState(ExecutionState.CANCELING, ExecutionState.CANCELED)) {
                // we were immediately canceled. tell the TaskManager that we reached our final
                // state
                notifyFinalState();
                if (metrics != null) {
                    metrics.close();
                }
                return;
            }
        } else {
            if (metrics != null) {
                metrics.close();
            }
            throw new IllegalStateException("Invalid state for beginning of operation of task " + this + '.');
        }
    }
    // all resource acquisitions and registrations from here on
    // need to be undone in the end
    Map<String, Future<Path>> distributedCacheEntries = new HashMap<>();
    TaskInvokable invokable = null;
    try {
        // ----------------------------
        // Task Bootstrap - We periodically
        // check for canceling as a shortcut
        // ----------------------------
        // activate safety net for task thread
        LOG.debug("Creating FileSystem stream leak safety net for task {}", this);
        FileSystemSafetyNet.initializeSafetyNetForThread();
        // first of all, get a user-code classloader
        // this may involve downloading the job's JAR files and/or classes
        LOG.info("Loading JAR files for task {}.", this);
        userCodeClassLoader = createUserCodeClassloader();
        final ExecutionConfig executionConfig = serializedExecutionConfig.deserializeValue(userCodeClassLoader.asClassLoader());
        if (executionConfig.getTaskCancellationInterval() >= 0) {
            // override task cancellation interval from Flink config if set in ExecutionConfig
            taskCancellationInterval = executionConfig.getTaskCancellationInterval();
        }
        if (executionConfig.getTaskCancellationTimeout() >= 0) {
            // override task cancellation timeout from Flink config if set in ExecutionConfig
            taskCancellationTimeout = executionConfig.getTaskCancellationTimeout();
        }
        if (isCanceledOrFailed()) {
            throw new CancelTaskException();
        }
        // ----------------------------------------------------------------
        // register the task with the network stack
        // this operation may fail if the system does not have enough
        // memory to run the necessary data exchanges
        // the registration must also strictly be undone
        // ----------------------------------------------------------------
        LOG.debug("Registering task at network: {}.", this);
        setupPartitionsAndGates(consumableNotifyingPartitionWriters, inputGates);
        for (ResultPartitionWriter partitionWriter : consumableNotifyingPartitionWriters) {
            taskEventDispatcher.registerPartition(partitionWriter.getPartitionId());
        }
        // next, kick off the background copying of files for the distributed cache
        try {
            for (Map.Entry<String, DistributedCache.DistributedCacheEntry> entry : DistributedCache.readFileInfoFromConfig(jobConfiguration)) {
                LOG.info("Obtaining local cache file for '{}'.", entry.getKey());
                Future<Path> cp = fileCache.createTmpFile(entry.getKey(), entry.getValue(), jobId, executionId);
                distributedCacheEntries.put(entry.getKey(), cp);
            }
        } catch (Exception e) {
            throw new Exception(String.format("Exception while adding files to distributed cache of task %s (%s).", taskNameWithSubtask, executionId), e);
        }
        if (isCanceledOrFailed()) {
            throw new CancelTaskException();
        }
        // ----------------------------------------------------------------
        // call the user code initialization methods
        // ----------------------------------------------------------------
        TaskKvStateRegistry kvStateRegistry = kvStateService.createKvStateTaskRegistry(jobId, getJobVertexId());
        Environment env = new RuntimeEnvironment(jobId, vertexId, executionId, executionConfig, taskInfo, jobConfiguration, taskConfiguration, userCodeClassLoader, memoryManager, ioManager, broadcastVariableManager, taskStateManager, aggregateManager, accumulatorRegistry, kvStateRegistry, inputSplitProvider, distributedCacheEntries, consumableNotifyingPartitionWriters, inputGates, taskEventDispatcher, checkpointResponder, operatorCoordinatorEventGateway, taskManagerConfig, metrics, this, externalResourceInfoProvider);
        // Make sure the user code classloader is accessible thread-locally.
        // We are setting the correct context class loader before instantiating the invokable
        // so that it is available to the invokable during its entire lifetime.
        executingThread.setContextClassLoader(userCodeClassLoader.asClassLoader());
        // When constructing invokable, separate threads can be constructed and thus should be
        // monitored for system exit (in addition to invoking thread itself monitored below).
        FlinkSecurityManager.monitorUserSystemExitForCurrentThread();
        try {
            // now load and instantiate the task's invokable code
            invokable = loadAndInstantiateInvokable(userCodeClassLoader.asClassLoader(), nameOfInvokableClass, env);
        } finally {
            FlinkSecurityManager.unmonitorUserSystemExitForCurrentThread();
        }
        // ----------------------------------------------------------------
        // actual task core work
        // ----------------------------------------------------------------
        // we must make strictly sure that the invokable is accessible to the cancel() call
        // by the time we switched to running.
        this.invokable = invokable;
        restoreAndInvoke(invokable);
        // to the fact that it has been canceled
        if (isCanceledOrFailed()) {
            throw new CancelTaskException();
        }
        // finish the produced partitions. if this fails, we consider the execution failed.
        for (ResultPartitionWriter partitionWriter : consumableNotifyingPartitionWriters) {
            if (partitionWriter != null) {
                partitionWriter.finish();
            }
        }
        // if that fails, the task was canceled/failed in the meantime
        if (!transitionState(ExecutionState.RUNNING, ExecutionState.FINISHED)) {
            throw new CancelTaskException();
        }
    } catch (Throwable t) {
        // ----------------------------------------------------------------
        // the execution failed. either the invokable code properly failed, or
        // an exception was thrown as a side effect of cancelling
        // ----------------------------------------------------------------
        t = preProcessException(t);
        try {
            // or to failExternally()
            while (true) {
                ExecutionState current = this.executionState;
                if (current == ExecutionState.RUNNING || current == ExecutionState.INITIALIZING || current == ExecutionState.DEPLOYING) {
                    if (ExceptionUtils.findThrowable(t, CancelTaskException.class).isPresent()) {
                        if (transitionState(current, ExecutionState.CANCELED, t)) {
                            cancelInvokable(invokable);
                            break;
                        }
                    } else {
                        if (transitionState(current, ExecutionState.FAILED, t)) {
                            cancelInvokable(invokable);
                            break;
                        }
                    }
                } else if (current == ExecutionState.CANCELING) {
                    if (transitionState(current, ExecutionState.CANCELED)) {
                        break;
                    }
                } else if (current == ExecutionState.FAILED) {
                    // in state failed already, no transition necessary any more
                    break;
                } else // unexpected state, go to failed
                if (transitionState(current, ExecutionState.FAILED, t)) {
                    LOG.error("Unexpected state in task {} ({}) during an exception: {}.", taskNameWithSubtask, executionId, current);
                    break;
                }
            // else fall through the loop and
            }
        } catch (Throwable tt) {
            String message = String.format("FATAL - exception in exception handler of task %s (%s).", taskNameWithSubtask, executionId);
            LOG.error(message, tt);
            notifyFatalError(message, tt);
        }
    } finally {
        try {
            LOG.info("Freeing task resources for {} ({}).", taskNameWithSubtask, executionId);
            // clear the reference to the invokable. this helps guard against holding references
            // to the invokable and its structures in cases where this Task object is still
            // referenced
            this.invokable = null;
            // free the network resources
            releaseResources();
            // free memory resources
            if (invokable != null) {
                memoryManager.releaseAll(invokable);
            }
            // remove all of the tasks resources
            fileCache.releaseJob(jobId, executionId);
            // close and de-activate safety net for task thread
            LOG.debug("Ensuring all FileSystem streams are closed for task {}", this);
            FileSystemSafetyNet.closeSafetyNetAndGuardedResourcesForThread();
            notifyFinalState();
        } catch (Throwable t) {
            // an error in the resource cleanup is fatal
            String message = String.format("FATAL - exception in resource cleanup of task %s (%s).", taskNameWithSubtask, executionId);
            LOG.error(message, t);
            notifyFatalError(message, t);
        }
        // errors here will only be logged
        try {
            metrics.close();
        } catch (Throwable t) {
            LOG.error("Error during metrics de-registration of task {} ({}).", taskNameWithSubtask, executionId, t);
        }
    }
}

Example 28 with Environment

use of org.apache.flink.runtime.execution.Environment in project flink by apache.

the class StreamTask method injectChannelStateWriterIntoChannels.

private void injectChannelStateWriterIntoChannels() {
    final Environment env = getEnvironment();
    final ChannelStateWriter channelStateWriter = subtaskCheckpointCoordinator.getChannelStateWriter();
    for (final InputGate gate : env.getAllInputGates()) {
        gate.setChannelStateWriter(channelStateWriter);
    }
    for (ResultPartitionWriter writer : env.getAllWriters()) {
        if (writer instanceof ChannelStateHolder) {
            ((ChannelStateHolder) writer).setChannelStateWriter(channelStateWriter);
        }
    }
}

Example 29 with Environment

use of org.apache.flink.runtime.execution.Environment in project flink by apache.

the class OperatorStateBackendTest method createMockEnvironment.

// ------------------------------------------------------------------------
// utilities
// ------------------------------------------------------------------------
private static Environment createMockEnvironment() {
    Environment env = mock(Environment.class);
    when(env.getExecutionConfig()).thenReturn(new ExecutionConfig());
    when(env.getUserCodeClassLoader()).thenReturn(TestingUserCodeClassLoader.newBuilder().build());
    return env;
}

Example 30 with Environment

use of org.apache.flink.runtime.execution.Environment in project flink by apache.

the class StreamSourceOperatorWatermarksTest method setupSourceOperator.

// ------------------------------------------------------------------------
@SuppressWarnings("unchecked")
private static <T> MockStreamTask setupSourceOperator(StreamSource<T, ?> operator, TimeCharacteristic timeChar, long watermarkInterval, final TimerService timeProvider) throws Exception {
    ExecutionConfig executionConfig = new ExecutionConfig();
    executionConfig.setAutoWatermarkInterval(watermarkInterval);
    StreamConfig cfg = new StreamConfig(new Configuration());
    cfg.setStateBackend(new MemoryStateBackend());
    cfg.setTimeCharacteristic(timeChar);
    cfg.setOperatorID(new OperatorID());
    Environment env = new DummyEnvironment("MockTwoInputTask", 1, 0);
    MockStreamTask mockTask = new MockStreamTaskBuilder(env).setConfig(cfg).setExecutionConfig(executionConfig).setTimerService(timeProvider).build();
    operator.setup(mockTask, cfg, (Output<StreamRecord<T>>) mock(Output.class));
    return mockTask;
}