public class IterationTailTask<S extends Function,OT> extends AbstractIterativeTask<S,OT>
If the iteration state is updated, the output of this task will be send back to the IterationHeadTask via a BackChannel for the workset -OR- a HashTable for the solution set.
Therefore this task must be scheduled on the same instance as the head. It's also possible for
the tail to update *both* the workset and the solution set.
If there is a separate solution set tail, the iteration head has to make sure to wait for it to finish.
isSolutionSetUpdate, isWorksetIteration, isWorksetUpdate, worksetAggregator, worksetBackChannelaccumulatorMap, broadcastInputReaders, broadcastInputSerializers, chainedTasks, config, driver, eventualOutputs, inputComparators, inputIterators, inputReaders, inputs, inputSerializers, iterativeBroadcastInputs, iterativeInputs, localStrategies, LOG, output, resettableInputs, running, runtimeUdfContext, stub, tempBarriers| Constructor and Description |
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IterationTailTask(Environment environment)
Create an Invokable task and set its environment.
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| Modifier and Type | Method and Description |
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protected void |
initialize() |
void |
run() |
brokerKey, cancel, closeLocalStrategiesAndCaches, createRuntimeContext, createSolutionSetUpdateOutputCollector, createWorksetUpdateOutputCollector, createWorksetUpdateOutputCollector, currentIteration, getIterationAggregators, incrementIterationCounter, inFirstIteration, requestTermination, terminationRequested, verifyEndOfSuperstepStatecancelChainedTasks, clearReaders, clearWriters, closeChainedTasks, closeUserCode, constructLogString, createInputIterator, excludeFromReset, formatLogString, getContainingTask, getDriverComparator, getInput, getInputSerializer, getIOManager, getLastOutputCollector, getLastTasksConfig, getMemoryManager, getMetricGroup, getNumTaskInputs, getOutputCollector, getOutputCollector, getStub, getTaskConfig, getTaskManagerInfo, initBroadcastInputReaders, initBroadcastInputsSerializers, initInputReaders, initInputsSerializersAndComparators, initLocalStrategies, initOutputs, initOutputs, initStub, instantiateUserCode, invoke, logAndThrowException, openChainedTasks, openUserCode, readAndSetBroadcastInput, releaseBroadcastVariables, resetAllInputs, setLastOutputCollectorabortCheckpointOnBarrier, cleanUp, dispatchOperatorEvent, getCurrentNumberOfSubtasks, getEnvironment, getExecutionConfig, getIndexInSubtaskGroup, getJobConfiguration, getTaskConfiguration, getUserCodeClassLoader, isUsingNonBlockingInput, maybeInterruptOnCancel, notifyCheckpointAbortAsync, notifyCheckpointCompleteAsync, notifyCheckpointSubsumedAsync, restore, triggerCheckpointAsync, triggerCheckpointOnBarrierclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetExecutionConfig, getUserCodeClassLoaderpublic IterationTailTask(Environment environment)
environment - The environment assigned to this invokable.protected void initialize()
throws Exception
initialize in class AbstractIterativeTask<S extends Function,OT>ExceptionCopyright © 2014–2024 The Apache Software Foundation. All rights reserved.