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

Example 21 with Environment

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

the class AsyncWaitOperatorTest method testClosingWithBlockedEmitter.

/**
	 * Test case for FLINK-5638: Tests that the async wait operator can be closed even if the
	 * emitter is currently waiting on the checkpoint lock (e.g. in the case of two chained async
	 * wait operators where the latter operator's queue is currently full).
	 *
	 * Note that this test does not enforce the exact strict ordering because with the fix it is no
	 * longer possible. However, it provokes the described situation without the fix.
	 */
@Test(timeout = 10000L)
public void testClosingWithBlockedEmitter() throws Exception {
    final Object lock = new Object();
    ArgumentCaptor<Throwable> failureReason = ArgumentCaptor.forClass(Throwable.class);
    Environment environment = mock(Environment.class);
    when(environment.getMetricGroup()).thenReturn(new UnregisteredTaskMetricsGroup());
    when(environment.getTaskManagerInfo()).thenReturn(new TestingTaskManagerRuntimeInfo());
    when(environment.getUserClassLoader()).thenReturn(getClass().getClassLoader());
    when(environment.getTaskInfo()).thenReturn(new TaskInfo("testTask", 1, 0, 1, 0));
    doNothing().when(environment).failExternally(failureReason.capture());
    StreamTask<?, ?> containingTask = mock(StreamTask.class);
    when(containingTask.getEnvironment()).thenReturn(environment);
    when(containingTask.getCheckpointLock()).thenReturn(lock);
    when(containingTask.getProcessingTimeService()).thenReturn(new TestProcessingTimeService());
    StreamConfig streamConfig = mock(StreamConfig.class);
    doReturn(IntSerializer.INSTANCE).when(streamConfig).getTypeSerializerIn1(any(ClassLoader.class));
    final OneShotLatch closingLatch = new OneShotLatch();
    final OneShotLatch outputLatch = new OneShotLatch();
    Output<StreamRecord<Integer>> output = mock(Output.class);
    doAnswer(new Answer() {

        @Override
        public Object answer(InvocationOnMock invocation) throws Throwable {
            assertTrue("Output should happen under the checkpoint lock.", Thread.currentThread().holdsLock(lock));
            outputLatch.trigger();
            // wait until we're in the closing method of the operator
            while (!closingLatch.isTriggered()) {
                lock.wait();
            }
            return null;
        }
    }).when(output).collect(any(StreamRecord.class));
    AsyncWaitOperator<Integer, Integer> operator = new TestAsyncWaitOperator<>(new MyAsyncFunction(), 1000L, 1, AsyncDataStream.OutputMode.ORDERED, closingLatch);
    operator.setup(containingTask, streamConfig, output);
    operator.open();
    synchronized (lock) {
        operator.processElement(new StreamRecord<>(42));
    }
    outputLatch.await();
    synchronized (lock) {
        operator.close();
    }
    // check that no concurrent exception has occurred
    try {
        verify(environment, never()).failExternally(any(Throwable.class));
    } catch (Error e) {
        // add the exception occurring in the emitter thread (root cause) as a suppressed
        // exception
        e.addSuppressed(failureReason.getValue());
        throw e;
    }
}

Example 22 with Environment

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

the class StreamTaskTest method testFailingCheckpointStreamOperator.

@Test
public void testFailingCheckpointStreamOperator() throws Exception {
    final long checkpointId = 42L;
    final long timestamp = 1L;
    TaskInfo mockTaskInfo = mock(TaskInfo.class);
    when(mockTaskInfo.getTaskNameWithSubtasks()).thenReturn("foobar");
    when(mockTaskInfo.getIndexOfThisSubtask()).thenReturn(0);
    Environment mockEnvironment = mock(Environment.class);
    when(mockEnvironment.getTaskInfo()).thenReturn(mockTaskInfo);
    StreamTask<?, AbstractStreamOperator<?>> streamTask = mock(StreamTask.class, Mockito.CALLS_REAL_METHODS);
    CheckpointMetaData checkpointMetaData = new CheckpointMetaData(checkpointId, timestamp);
    streamTask.setEnvironment(mockEnvironment);
    // mock the operators
    StreamOperator<?> streamOperator1 = mock(StreamOperator.class, withSettings().extraInterfaces(StreamCheckpointedOperator.class));
    StreamOperator<?> streamOperator2 = mock(StreamOperator.class, withSettings().extraInterfaces(StreamCheckpointedOperator.class));
    StreamOperator<?> streamOperator3 = mock(StreamOperator.class, withSettings().extraInterfaces(StreamCheckpointedOperator.class));
    // mock the returned snapshots
    OperatorSnapshotResult operatorSnapshotResult1 = mock(OperatorSnapshotResult.class);
    OperatorSnapshotResult operatorSnapshotResult2 = mock(OperatorSnapshotResult.class);
    final Exception testException = new Exception("Test exception");
    when(streamOperator1.snapshotState(anyLong(), anyLong(), any(CheckpointOptions.class))).thenReturn(operatorSnapshotResult1);
    when(streamOperator2.snapshotState(anyLong(), anyLong(), any(CheckpointOptions.class))).thenReturn(operatorSnapshotResult2);
    when(streamOperator3.snapshotState(anyLong(), anyLong(), any(CheckpointOptions.class))).thenThrow(testException);
    // mock the returned legacy snapshots
    StreamStateHandle streamStateHandle1 = mock(StreamStateHandle.class);
    StreamStateHandle streamStateHandle2 = mock(StreamStateHandle.class);
    StreamStateHandle streamStateHandle3 = mock(StreamStateHandle.class);
    when(streamOperator1.snapshotLegacyOperatorState(anyLong(), anyLong(), any(CheckpointOptions.class))).thenReturn(streamStateHandle1);
    when(streamOperator2.snapshotLegacyOperatorState(anyLong(), anyLong(), any(CheckpointOptions.class))).thenReturn(streamStateHandle2);
    when(streamOperator3.snapshotLegacyOperatorState(anyLong(), anyLong(), any(CheckpointOptions.class))).thenReturn(streamStateHandle3);
    // set up the task
    StreamOperator<?>[] streamOperators = { streamOperator1, streamOperator2, streamOperator3 };
    OperatorChain<Void, AbstractStreamOperator<Void>> operatorChain = mock(OperatorChain.class);
    when(operatorChain.getAllOperators()).thenReturn(streamOperators);
    Whitebox.setInternalState(streamTask, "isRunning", true);
    Whitebox.setInternalState(streamTask, "lock", new Object());
    Whitebox.setInternalState(streamTask, "operatorChain", operatorChain);
    Whitebox.setInternalState(streamTask, "cancelables", new CloseableRegistry());
    Whitebox.setInternalState(streamTask, "configuration", new StreamConfig(new Configuration()));
    try {
        streamTask.triggerCheckpoint(checkpointMetaData, CheckpointOptions.forFullCheckpoint());
        fail("Expected test exception here.");
    } catch (Exception e) {
        assertEquals(testException, e.getCause());
    }
    verify(operatorSnapshotResult1).cancel();
    verify(operatorSnapshotResult2).cancel();
    verify(streamStateHandle1).discardState();
    verify(streamStateHandle2).discardState();
    verify(streamStateHandle3).discardState();
}

Example 23 with Environment

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

the class StreamOperatorChainingTest method createMockTask.

private <IN, OT extends StreamOperator<IN>> StreamTask<IN, OT> createMockTask(StreamConfig streamConfig, String taskName) {
    final Object checkpointLock = new Object();
    final Environment env = new MockEnvironment(taskName, 3 * 1024 * 1024, new MockInputSplitProvider(), 1024);
    @SuppressWarnings("unchecked") StreamTask<IN, OT> mockTask = mock(StreamTask.class);
    when(mockTask.getName()).thenReturn("Mock Task");
    when(mockTask.getCheckpointLock()).thenReturn(checkpointLock);
    when(mockTask.getConfiguration()).thenReturn(streamConfig);
    when(mockTask.getEnvironment()).thenReturn(env);
    when(mockTask.getExecutionConfig()).thenReturn(new ExecutionConfig().enableObjectReuse());
    return mockTask;
}

Example 24 with Environment

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

the class Task method run.

/**
	 * The core work method that bootstraps the task and executes it code
	 */
@Override
public void run() {
    // ----------------------------
    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();
            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();
                return;
            }
        } else {
            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<String, Future<Path>>();
    AbstractInvokable invokable = null;
    ClassLoader userCodeClassLoader;
    try {
        // ----------------------------
        //  Task Bootstrap - We periodically
        //  check for canceling as a shortcut
        // ----------------------------
        // activate safety net for task thread
        LOG.info("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(libraryCache);
        final ExecutionConfig executionConfig = serializedExecutionConfig.deserializeValue(userCodeClassLoader);
        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();
        }
        // now load the task's invokable code
        invokable = loadAndInstantiateInvokable(userCodeClassLoader, nameOfInvokableClass);
        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.info("Registering task at network: {}.", this);
        network.registerTask(this);
        // 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);
                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 = network.createKvStateTaskRegistry(jobId, getJobVertexId());
        Environment env = new RuntimeEnvironment(jobId, vertexId, executionId, executionConfig, taskInfo, jobConfiguration, taskConfiguration, userCodeClassLoader, memoryManager, ioManager, broadcastVariableManager, accumulatorRegistry, kvStateRegistry, inputSplitProvider, distributedCacheEntries, writers, inputGates, checkpointResponder, taskManagerConfig, metrics, this);
        // let the task code create its readers and writers
        invokable.setEnvironment(env);
        if (null != taskStateHandles) {
            if (invokable instanceof StatefulTask) {
                StatefulTask op = (StatefulTask) invokable;
                op.setInitialState(taskStateHandles);
            } else {
                throw new IllegalStateException("Found operator state for a non-stateful task invokable");
            }
            // be memory and GC friendly - since the code stays in invoke() for a potentially long time,
            // we clear the reference to the state handle
            //noinspection UnusedAssignment
            taskStateHandles = null;
        }
        // ----------------------------------------------------------------
        //  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;
        // switch to the RUNNING state, if that fails, we have been canceled/failed in the meantime
        if (!transitionState(ExecutionState.DEPLOYING, ExecutionState.RUNNING)) {
            throw new CancelTaskException();
        }
        // notify everyone that we switched to running
        notifyObservers(ExecutionState.RUNNING, null);
        taskManagerActions.updateTaskExecutionState(new TaskExecutionState(jobId, executionId, ExecutionState.RUNNING));
        // make sure the user code classloader is accessible thread-locally
        executingThread.setContextClassLoader(userCodeClassLoader);
        // run the invokable
        invokable.invoke();
        // 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 (ResultPartition partition : producedPartitions) {
            if (partition != null) {
                partition.finish();
            }
        }
        // if that fails, the task was canceled/failed in the meantime
        if (transitionState(ExecutionState.RUNNING, ExecutionState.FINISHED)) {
            notifyObservers(ExecutionState.FINISHED, null);
        } else {
            throw new CancelTaskException();
        }
    } catch (Throwable t) {
        try {
            // check if the exception is unrecoverable
            if (ExceptionUtils.isJvmFatalError(t) || (t instanceof OutOfMemoryError && taskManagerConfig.shouldExitJvmOnOutOfMemoryError())) {
                // don't attempt a clean shutdown, because we cannot expect the clean shutdown to complete
                try {
                    LOG.error("Encountered fatal error {} - terminating the JVM", t.getClass().getName(), t);
                } finally {
                    Runtime.getRuntime().halt(-1);
                }
            }
            // to failExternally()
            while (true) {
                ExecutionState current = this.executionState;
                if (current == ExecutionState.RUNNING || current == ExecutionState.DEPLOYING) {
                    if (t instanceof CancelTaskException) {
                        if (transitionState(current, ExecutionState.CANCELED)) {
                            cancelInvokable();
                            notifyObservers(ExecutionState.CANCELED, null);
                            break;
                        }
                    } else {
                        if (transitionState(current, ExecutionState.FAILED, t)) {
                            // proper failure of the task. record the exception as the root cause
                            String errorMessage = String.format("Execution of %s (%s) failed.", taskNameWithSubtask, executionId);
                            failureCause = t;
                            cancelInvokable();
                            notifyObservers(ExecutionState.FAILED, new Exception(errorMessage, t));
                            break;
                        }
                    }
                } else if (current == ExecutionState.CANCELING) {
                    if (transitionState(current, ExecutionState.CANCELED)) {
                        notifyObservers(ExecutionState.CANCELED, null);
                        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);
            // stop the async dispatcher.
            // copy dispatcher reference to stack, against concurrent release
            ExecutorService dispatcher = this.asyncCallDispatcher;
            if (dispatcher != null && !dispatcher.isShutdown()) {
                dispatcher.shutdownNow();
            }
            // free the network resources
            network.unregisterTask(this);
            // free memory resources
            if (invokable != null) {
                memoryManager.releaseAll(invokable);
            }
            // remove all of the tasks library resources
            libraryCache.unregisterTask(jobId, executionId);
            // remove all files in the distributed cache
            removeCachedFiles(distributedCacheEntries, fileCache);
            // close and de-activate safety net for task thread
            LOG.info("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 25 with Environment

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

the class ChainedDriver method setup.

public void setup(TaskConfig config, String taskName, Collector<OT> outputCollector, AbstractInvokable parent, UserCodeClassLoader userCodeClassLoader, ExecutionConfig executionConfig, Map<String, Accumulator<?, ?>> accumulatorMap) {
    this.config = config;
    this.taskName = taskName;
    this.userCodeClassLoader = userCodeClassLoader.asClassLoader();
    this.metrics = parent.getEnvironment().getMetricGroup().getOrAddOperator(taskName);
    this.numRecordsIn = this.metrics.getIOMetricGroup().getNumRecordsInCounter();
    this.numRecordsOut = this.metrics.getIOMetricGroup().getNumRecordsOutCounter();
    this.outputCollector = new CountingCollector<>(outputCollector, numRecordsOut);
    Environment env = parent.getEnvironment();
    if (parent instanceof BatchTask) {
        this.udfContext = ((BatchTask<?, ?>) parent).createRuntimeContext(metrics);
    } else {
        this.udfContext = new DistributedRuntimeUDFContext(env.getTaskInfo(), userCodeClassLoader, parent.getExecutionConfig(), env.getDistributedCacheEntries(), accumulatorMap, metrics, env.getExternalResourceInfoProvider(), env.getJobID());
    }
    this.executionConfig = executionConfig;
    this.objectReuseEnabled = executionConfig.isObjectReuseEnabled();
    setup(parent);
}