use of org.apache.beam.runners.dataflow.worker.graph.Nodes.ParallelInstructionNode in project beam by apache.
the class ReplacePgbkWithPrecombineFunction method apply.
@Override
public MutableNetwork<Node, Edge> apply(MutableNetwork<Node, Edge> network) {
Networks.replaceDirectedNetworkNodes(network, (Node node) -> {
if (!isPrecombinePgbk(node)) {
return node;
}
// Turn the Pgbk into a ParDo with the combine function as a UserFn.
ParallelInstructionNode castNode = ((ParallelInstructionNode) node);
ParallelInstruction parallelInstruction = castNode.getParallelInstruction();
Map<String, Object> cloudUserFnSpec = parallelInstruction.getPartialGroupByKey().getValueCombiningFn();
addString(cloudUserFnSpec, WorkerPropertyNames.PHASE, CombinePhase.ADD);
ParDoInstruction newParDoInstruction = new ParDoInstruction();
newParDoInstruction.setUserFn(cloudUserFnSpec);
ParallelInstruction newParallelInstruction = parallelInstruction.clone();
newParallelInstruction.setPartialGroupByKey(null);
newParallelInstruction.setParDo(newParDoInstruction);
return ParallelInstructionNode.create(newParallelInstruction, ExecutionLocation.UNKNOWN);
});
return network;
}
use of org.apache.beam.runners.dataflow.worker.graph.Nodes.ParallelInstructionNode in project beam by apache.
the class CloneAmbiguousFlattensFunction method cloneFlatten.
/**
* A helper function which performs the actual cloning procedure, which means creating the runner
* and SDK versions of both the ambiguous flatten and its PCollection, attaching the old flatten's
* predecessors and successors properly, and then removing the ambiguous flatten from the network.
*/
private void cloneFlatten(Node flatten, MutableNetwork<Node, Edge> network) {
// Start by creating the clones of the flatten and its PCollection.
InstructionOutputNode flattenOut = (InstructionOutputNode) Iterables.getOnlyElement(network.successors(flatten));
ParallelInstruction flattenInstruction = ((ParallelInstructionNode) flatten).getParallelInstruction();
Node runnerFlatten = ParallelInstructionNode.create(flattenInstruction, ExecutionLocation.RUNNER_HARNESS);
Node runnerFlattenOut = InstructionOutputNode.create(flattenOut.getInstructionOutput(), flattenOut.getPcollectionId());
network.addNode(runnerFlatten);
network.addNode(runnerFlattenOut);
Node sdkFlatten = ParallelInstructionNode.create(flattenInstruction, ExecutionLocation.SDK_HARNESS);
Node sdkFlattenOut = InstructionOutputNode.create(flattenOut.getInstructionOutput(), flattenOut.getPcollectionId());
network.addNode(sdkFlatten);
network.addNode(sdkFlattenOut);
for (Edge edge : ImmutableList.copyOf(network.edgesConnecting(flatten, flattenOut))) {
network.addEdge(runnerFlatten, runnerFlattenOut, edge.clone());
network.addEdge(sdkFlatten, sdkFlattenOut, edge.clone());
}
// Copy over predecessor edges to both cloned nodes.
for (Node predecessor : network.predecessors(flatten)) {
for (Edge edge : ImmutableList.copyOf(network.edgesConnecting(predecessor, flatten))) {
network.addEdge(predecessor, runnerFlatten, edge.clone());
network.addEdge(predecessor, sdkFlatten, edge.clone());
}
}
// Copy over successor edges depending on execution locations of successors.
for (Node successor : network.successors(flattenOut)) {
// Connect successor to SDK harness only if sure it executes in SDK.
Node selectedOutput = executesInSdkHarness(successor) ? sdkFlattenOut : runnerFlattenOut;
for (Edge edge : ImmutableList.copyOf(network.edgesConnecting(flattenOut, successor))) {
network.addEdge(selectedOutput, successor, edge.clone());
}
}
network.removeNode(flatten);
network.removeNode(flattenOut);
}
use of org.apache.beam.runners.dataflow.worker.graph.Nodes.ParallelInstructionNode in project beam by apache.
the class CloneAmbiguousFlattensFunction method apply.
@Override
public MutableNetwork<Node, Edge> apply(MutableNetwork<Node, Edge> network) {
// Important: The cloning technique only works when the flatten being cloned has no ambiguous
// descendants, so to ensure this is always true we iterate through the network in reverse
// topological order.
Set<Node> sortedNodesSet = Networks.topologicalOrder(network);
Node[] sortedNodes = sortedNodesSet.toArray(new Node[sortedNodesSet.size()]);
for (int i = sortedNodes.length - 1; i >= 0; i--) {
Node node = sortedNodes[i];
if (node instanceof ParallelInstructionNode && ((ParallelInstructionNode) node).getParallelInstruction().getFlatten() != null && ((ParallelInstructionNode) node).getExecutionLocation() == ExecutionLocation.AMBIGUOUS) {
cloneFlatten(node, network);
}
}
return network;
}
use of org.apache.beam.runners.dataflow.worker.graph.Nodes.ParallelInstructionNode in project beam by apache.
the class StreamingDataflowWorker method process.
private void process(final SdkWorkerHarness worker, final ComputationState computationState, final Instant inputDataWatermark, @Nullable final Instant outputDataWatermark, @Nullable final Instant synchronizedProcessingTime, final Work work) {
final Windmill.WorkItem workItem = work.getWorkItem();
final String computationId = computationState.getComputationId();
final ByteString key = workItem.getKey();
work.setState(State.PROCESSING);
{
StringBuilder workIdBuilder = new StringBuilder(33);
workIdBuilder.append(Long.toHexString(workItem.getShardingKey()));
workIdBuilder.append('-');
workIdBuilder.append(Long.toHexString(workItem.getWorkToken()));
DataflowWorkerLoggingMDC.setWorkId(workIdBuilder.toString());
}
DataflowWorkerLoggingMDC.setStageName(computationId);
LOG.debug("Starting processing for {}:\n{}", computationId, work);
Windmill.WorkItemCommitRequest.Builder outputBuilder = initializeOutputBuilder(key, workItem);
// Before any processing starts, call any pending OnCommit callbacks. Nothing that requires
// cleanup should be done before this, since we might exit early here.
callFinalizeCallbacks(workItem);
if (workItem.getSourceState().getOnlyFinalize()) {
outputBuilder.setSourceStateUpdates(Windmill.SourceState.newBuilder().setOnlyFinalize(true));
work.setState(State.COMMIT_QUEUED);
commitQueue.put(new Commit(outputBuilder.build(), computationState, work));
return;
}
long processingStartTimeNanos = System.nanoTime();
final MapTask mapTask = computationState.getMapTask();
StageInfo stageInfo = stageInfoMap.computeIfAbsent(mapTask.getStageName(), s -> new StageInfo(s, mapTask.getSystemName(), this));
ExecutionState executionState = null;
try {
executionState = computationState.getExecutionStateQueue(worker).poll();
if (executionState == null) {
MutableNetwork<Node, Edge> mapTaskNetwork = mapTaskToNetwork.apply(mapTask);
if (LOG.isDebugEnabled()) {
LOG.debug("Network as Graphviz .dot: {}", Networks.toDot(mapTaskNetwork));
}
ParallelInstructionNode readNode = (ParallelInstructionNode) Iterables.find(mapTaskNetwork.nodes(), node -> node instanceof ParallelInstructionNode && ((ParallelInstructionNode) node).getParallelInstruction().getRead() != null);
InstructionOutputNode readOutputNode = (InstructionOutputNode) Iterables.getOnlyElement(mapTaskNetwork.successors(readNode));
DataflowExecutionContext.DataflowExecutionStateTracker executionStateTracker = new DataflowExecutionContext.DataflowExecutionStateTracker(ExecutionStateSampler.instance(), stageInfo.executionStateRegistry.getState(NameContext.forStage(mapTask.getStageName()), "other", null, ScopedProfiler.INSTANCE.emptyScope()), stageInfo.deltaCounters, options, computationId);
StreamingModeExecutionContext context = new StreamingModeExecutionContext(pendingDeltaCounters, computationId, readerCache, !computationState.getTransformUserNameToStateFamily().isEmpty() ? computationState.getTransformUserNameToStateFamily() : stateNameMap, stateCache.forComputation(computationId), stageInfo.metricsContainerRegistry, executionStateTracker, stageInfo.executionStateRegistry, maxSinkBytes);
DataflowMapTaskExecutor mapTaskExecutor = mapTaskExecutorFactory.create(worker.getControlClientHandler(), worker.getGrpcDataFnServer(), sdkHarnessRegistry.beamFnDataApiServiceDescriptor(), worker.getGrpcStateFnServer(), mapTaskNetwork, options, mapTask.getStageName(), readerRegistry, sinkRegistry, context, pendingDeltaCounters, idGenerator);
ReadOperation readOperation = mapTaskExecutor.getReadOperation();
// Disable progress updates since its results are unused for streaming
// and involves starting a thread.
readOperation.setProgressUpdatePeriodMs(ReadOperation.DONT_UPDATE_PERIODICALLY);
Preconditions.checkState(mapTaskExecutor.supportsRestart(), "Streaming runner requires all operations support restart.");
Coder<?> readCoder;
readCoder = CloudObjects.coderFromCloudObject(CloudObject.fromSpec(readOutputNode.getInstructionOutput().getCodec()));
Coder<?> keyCoder = extractKeyCoder(readCoder);
// If using a custom source, count bytes read for autoscaling.
if (CustomSources.class.getName().equals(readNode.getParallelInstruction().getRead().getSource().getSpec().get("@type"))) {
NameContext nameContext = NameContext.create(mapTask.getStageName(), readNode.getParallelInstruction().getOriginalName(), readNode.getParallelInstruction().getSystemName(), readNode.getParallelInstruction().getName());
readOperation.receivers[0].addOutputCounter(new OutputObjectAndByteCounter(new IntrinsicMapTaskExecutorFactory.ElementByteSizeObservableCoder<>(readCoder), mapTaskExecutor.getOutputCounters(), nameContext).setSamplingPeriod(100).countBytes("dataflow_input_size-" + mapTask.getSystemName()));
}
executionState = new ExecutionState(mapTaskExecutor, context, keyCoder, executionStateTracker);
}
WindmillStateReader stateReader = new WindmillStateReader(metricTrackingWindmillServer, computationId, key, workItem.getShardingKey(), workItem.getWorkToken());
StateFetcher localStateFetcher = stateFetcher.byteTrackingView();
// If the read output KVs, then we can decode Windmill's byte key into a userland
// key object and provide it to the execution context for use with per-key state.
// Otherwise, we pass null.
//
// The coder type that will be present is:
// WindowedValueCoder(TimerOrElementCoder(KvCoder))
@Nullable Coder<?> keyCoder = executionState.getKeyCoder();
@Nullable Object executionKey = keyCoder == null ? null : keyCoder.decode(key.newInput(), Coder.Context.OUTER);
if (workItem.hasHotKeyInfo()) {
Windmill.HotKeyInfo hotKeyInfo = workItem.getHotKeyInfo();
Duration hotKeyAge = Duration.millis(hotKeyInfo.getHotKeyAgeUsec() / 1000);
// The MapTask instruction is ordered by dependencies, such that the first element is
// always going to be the shuffle task.
String stepName = computationState.getMapTask().getInstructions().get(0).getName();
if (options.isHotKeyLoggingEnabled() && keyCoder != null) {
hotKeyLogger.logHotKeyDetection(stepName, hotKeyAge, executionKey);
} else {
hotKeyLogger.logHotKeyDetection(stepName, hotKeyAge);
}
}
executionState.getContext().start(executionKey, workItem, inputDataWatermark, outputDataWatermark, synchronizedProcessingTime, stateReader, localStateFetcher, outputBuilder);
// Blocks while executing work.
executionState.getWorkExecutor().execute();
Iterables.addAll(this.pendingMonitoringInfos, executionState.getWorkExecutor().extractMetricUpdates());
commitCallbacks.putAll(executionState.getContext().flushState());
// Release the execution state for another thread to use.
computationState.getExecutionStateQueue(worker).offer(executionState);
executionState = null;
// Add the output to the commit queue.
work.setState(State.COMMIT_QUEUED);
WorkItemCommitRequest commitRequest = outputBuilder.build();
int byteLimit = maxWorkItemCommitBytes;
int commitSize = commitRequest.getSerializedSize();
int estimatedCommitSize = commitSize < 0 ? Integer.MAX_VALUE : commitSize;
// Detect overflow of integer serialized size or if the byte limit was exceeded.
windmillMaxObservedWorkItemCommitBytes.addValue(estimatedCommitSize);
if (commitSize < 0 || commitSize > byteLimit) {
KeyCommitTooLargeException e = KeyCommitTooLargeException.causedBy(computationId, byteLimit, commitRequest);
reportFailure(computationId, workItem, e);
LOG.error(e.toString());
// Drop the current request in favor of a new, minimal one requesting truncation.
// Messages, timers, counters, and other commit content will not be used by the service
// so we're purposefully dropping them here
commitRequest = buildWorkItemTruncationRequest(key, workItem, estimatedCommitSize);
}
commitQueue.put(new Commit(commitRequest, computationState, work));
// Compute shuffle and state byte statistics these will be flushed asynchronously.
long stateBytesWritten = outputBuilder.clearOutputMessages().build().getSerializedSize();
long shuffleBytesRead = 0;
for (Windmill.InputMessageBundle bundle : workItem.getMessageBundlesList()) {
for (Windmill.Message message : bundle.getMessagesList()) {
shuffleBytesRead += message.getSerializedSize();
}
}
long stateBytesRead = stateReader.getBytesRead() + localStateFetcher.getBytesRead();
windmillShuffleBytesRead.addValue(shuffleBytesRead);
windmillStateBytesRead.addValue(stateBytesRead);
windmillStateBytesWritten.addValue(stateBytesWritten);
LOG.debug("Processing done for work token: {}", workItem.getWorkToken());
} catch (Throwable t) {
if (executionState != null) {
try {
executionState.getContext().invalidateCache();
executionState.getWorkExecutor().close();
} catch (Exception e) {
LOG.warn("Failed to close map task executor: ", e);
} finally {
// Release references to potentially large objects early.
executionState = null;
}
}
t = t instanceof UserCodeException ? t.getCause() : t;
boolean retryLocally = false;
if (KeyTokenInvalidException.isKeyTokenInvalidException(t)) {
LOG.debug("Execution of work for computation '{}' on key '{}' failed due to token expiration. " + "Work will not be retried locally.", computationId, key.toStringUtf8());
} else {
LastExceptionDataProvider.reportException(t);
LOG.debug("Failed work: {}", work);
Duration elapsedTimeSinceStart = new Duration(Instant.now(), work.getStartTime());
if (!reportFailure(computationId, workItem, t)) {
LOG.error("Execution of work for computation '{}' on key '{}' failed with uncaught exception, " + "and Windmill indicated not to retry locally.", computationId, key.toStringUtf8(), t);
} else if (isOutOfMemoryError(t)) {
File heapDump = memoryMonitor.tryToDumpHeap();
LOG.error("Execution of work for computation '{}' for key '{}' failed with out-of-memory. " + "Work will not be retried locally. Heap dump {}.", computationId, key.toStringUtf8(), heapDump == null ? "not written" : ("written to '" + heapDump + "'"), t);
} else if (elapsedTimeSinceStart.isLongerThan(MAX_LOCAL_PROCESSING_RETRY_DURATION)) {
LOG.error("Execution of work for computation '{}' for key '{}' failed with uncaught exception, " + "and it will not be retried locally because the elapsed time since start {} " + "exceeds {}.", computationId, key.toStringUtf8(), elapsedTimeSinceStart, MAX_LOCAL_PROCESSING_RETRY_DURATION, t);
} else {
LOG.error("Execution of work for computation '{}' on key '{}' failed with uncaught exception. " + "Work will be retried locally.", computationId, key.toStringUtf8(), t);
retryLocally = true;
}
}
if (retryLocally) {
// Try again after some delay and at the end of the queue to avoid a tight loop.
sleep(retryLocallyDelayMs);
workUnitExecutor.forceExecute(work, work.getWorkItem().getSerializedSize());
} else {
// Consider the item invalid. It will eventually be retried by Windmill if it still needs to
// be processed.
computationState.completeWork(ShardedKey.create(key, workItem.getShardingKey()), workItem.getWorkToken());
}
} finally {
// Update total processing time counters. Updating in finally clause ensures that
// work items causing exceptions are also accounted in time spent.
long processingTimeMsecs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - processingStartTimeNanos);
stageInfo.totalProcessingMsecs.addValue(processingTimeMsecs);
// either here or in DFE.
if (work.getWorkItem().hasTimers()) {
stageInfo.timerProcessingMsecs.addValue(processingTimeMsecs);
}
DataflowWorkerLoggingMDC.setWorkId(null);
DataflowWorkerLoggingMDC.setStageName(null);
}
}
use of org.apache.beam.runners.dataflow.worker.graph.Nodes.ParallelInstructionNode in project beam by apache.
the class IntrinsicMapTaskExecutorFactory method createParDoOperation.
private OperationNode createParDoOperation(Network<Node, Edge> network, ParallelInstructionNode node, PipelineOptions options, DataflowExecutionContext<?> executionContext, DataflowOperationContext operationContext) throws Exception {
ParallelInstruction instruction = node.getParallelInstruction();
ParDoInstruction parDo = instruction.getParDo();
TupleTag<?> mainOutputTag = tupleTag(parDo.getMultiOutputInfos().get(0));
ImmutableMap.Builder<TupleTag<?>, Integer> outputTagsToReceiverIndicesBuilder = ImmutableMap.builder();
int successorOffset = 0;
for (Node successor : network.successors(node)) {
for (Edge edge : network.edgesConnecting(node, successor)) {
outputTagsToReceiverIndicesBuilder.put(tupleTag(((MultiOutputInfoEdge) edge).getMultiOutputInfo()), successorOffset);
}
successorOffset += 1;
}
ParDoFn fn = parDoFnFactory.create(options, CloudObject.fromSpec(parDo.getUserFn()), parDo.getSideInputs(), mainOutputTag, outputTagsToReceiverIndicesBuilder.build(), executionContext, operationContext);
OutputReceiver[] receivers = getOutputReceivers(network, node);
return OperationNode.create(new ParDoOperation(fn, receivers, operationContext));
}
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