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[jvm-packages] move the dmatrix building into rabit context (#7823)

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This fixes the QuantileDeviceDMatrix in distributed environment.
This commit is contained in:
Bobby Wang 2022-04-23 00:06:50 +08:00 committed by GitHub
parent f0f76259c9
commit c45665a55a
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 87 additions and 55 deletions
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28
jvm-packages/xgboost4j-spark-gpu/src/main/scala/ml/dmlc/xgboost4j/scala/rapids/spark/GpuPreXGBoost.scala
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@ -56,18 +56,20 @@ class GpuPreXGBoost extends PreXGBoostProvider {
} }
/** /**
* Convert the Dataset[_] to RDD[Watches] which will be fed to XGBoost * Convert the Dataset[_] to RDD[() => Watches] which will be fed to XGBoost
* *
* @param estimator [[XGBoostClassifier]] or [[XGBoostRegressor]] * @param estimator [[XGBoostClassifier]] or [[XGBoostRegressor]]
* @param dataset the training data * @param dataset the training data
* @param params all user defined and defaulted params * @param params all user defined and defaulted params
* @return [[XGBoostExecutionParams]] => (RDD[[Watches]], Option[ RDD[_] ]) * @return [[XGBoostExecutionParams]] => (Boolean, RDD[[() => Watches]], Option[ RDD[_] ])
* RDD[Watches] will be used as the training input * Boolean if building DMatrix in rabit context
* RDD[() => Watches] will be used as the training input
* Option[ RDD[_] ] is the optional cached RDD * Option[ RDD[_] ] is the optional cached RDD
*/ */
override def buildDatasetToRDD(estimator: Estimator[_], override def buildDatasetToRDD(estimator: Estimator[_],
dataset: Dataset[_], dataset: Dataset[_],
params: Map[String, Any]): XGBoostExecutionParams => (RDD[Watches], Option[RDD[_]]) = { params: Map[String, Any]):
XGBoostExecutionParams => (Boolean, RDD[() => Watches], Option[RDD[_]]) = {
GpuPreXGBoost.buildDatasetToRDD(estimator, dataset, params) GpuPreXGBoost.buildDatasetToRDD(estimator, dataset, params)
} }
@ -116,19 +118,21 @@ object GpuPreXGBoost extends PreXGBoostProvider {
} }
/** /**
* Convert the Dataset[_] to RDD[Watches] which will be fed to XGBoost * Convert the Dataset[_] to RDD[() => Watches] which will be fed to XGBoost
* *
* @param estimator supports XGBoostClassifier and XGBoostRegressor * @param estimator supports XGBoostClassifier and XGBoostRegressor
* @param dataset the training data * @param dataset the training data
* @param params all user defined and defaulted params * @param params all user defined and defaulted params
* @return [[XGBoostExecutionParams]] => (RDD[[Watches]], Option[ RDD[_] ]) * @return [[XGBoostExecutionParams]] => (Boolean, RDD[[() => Watches]], Option[ RDD[_] ])
* RDD[Watches] will be used as the training input * Boolean if building DMatrix in rabit context
* RDD[() => Watches] will be used as the training input to build DMatrix
* Option[ RDD[_] ] is the optional cached RDD * Option[ RDD[_] ] is the optional cached RDD
*/ */
override def buildDatasetToRDD( override def buildDatasetToRDD(
estimator: Estimator[_], estimator: Estimator[_],
dataset: Dataset[_], dataset: Dataset[_],
params: Map[String, Any]): XGBoostExecutionParams => (RDD[Watches], Option[RDD[_]]) = { params: Map[String, Any]):
XGBoostExecutionParams => (Boolean, RDD[() => Watches], Option[RDD[_]]) = {
val (Seq(labelName, weightName, marginName), feturesCols, groupName, evalSets) = val (Seq(labelName, weightName, marginName), feturesCols, groupName, evalSets) =
estimator match { estimator match {
@ -166,7 +170,7 @@ object GpuPreXGBoost extends PreXGBoostProvider {
xgbExecParams: XGBoostExecutionParams => xgbExecParams: XGBoostExecutionParams =>
val dataMap = prepareInputData(trainingData, evalDataMap, xgbExecParams.numWorkers, val dataMap = prepareInputData(trainingData, evalDataMap, xgbExecParams.numWorkers,
xgbExecParams.cacheTrainingSet) xgbExecParams.cacheTrainingSet)
(buildRDDWatches(dataMap, xgbExecParams, evalDataMap.isEmpty), None) (true, buildRDDWatches(dataMap, xgbExecParams, evalDataMap.isEmpty), None)
} }
/** /**
@ -448,7 +452,7 @@ object GpuPreXGBoost extends PreXGBoostProvider {
private def buildRDDWatches( private def buildRDDWatches(
dataMap: Map[String, ColumnDataBatch], dataMap: Map[String, ColumnDataBatch],
xgbExeParams: XGBoostExecutionParams, xgbExeParams: XGBoostExecutionParams,
noEvalSet: Boolean): RDD[Watches] = { noEvalSet: Boolean): RDD[() => Watches] = {
val sc = dataMap(TRAIN_NAME).rawDF.sparkSession.sparkContext val sc = dataMap(TRAIN_NAME).rawDF.sparkSession.sparkContext
val maxBin = xgbExeParams.toMap.getOrElse("max_bin", 256).asInstanceOf[Int] val maxBin = xgbExeParams.toMap.getOrElse("max_bin", 256).asInstanceOf[Int]
@ -459,7 +463,7 @@ object GpuPreXGBoost extends PreXGBoostProvider {
GpuUtils.toColumnarRdd(dataMap(TRAIN_NAME).rawDF).mapPartitions({ GpuUtils.toColumnarRdd(dataMap(TRAIN_NAME).rawDF).mapPartitions({
iter => iter =>
val iterColBatch = iter.map(table => new GpuColumnBatch(table, null)) val iterColBatch = iter.map(table => new GpuColumnBatch(table, null))
Iterator(buildWatches( Iterator(() => buildWatches(
PreXGBoost.getCacheDirName(xgbExeParams.useExternalMemory), xgbExeParams.missing, PreXGBoost.getCacheDirName(xgbExeParams.useExternalMemory), xgbExeParams.missing,
colIndicesForTrain, iterColBatch, maxBin)) colIndicesForTrain, iterColBatch, maxBin))
}) })
@ -469,7 +473,7 @@ object GpuPreXGBoost extends PreXGBoostProvider {
val nameAndColIndices = dataMap.map(nc => (nc._1, nc._2.colIndices)) val nameAndColIndices = dataMap.map(nc => (nc._1, nc._2.colIndices))
coPartitionForGpu(dataMap, sc, xgbExeParams.numWorkers).mapPartitions { coPartitionForGpu(dataMap, sc, xgbExeParams.numWorkers).mapPartitions {
nameAndColumnBatchIter => nameAndColumnBatchIter =>
Iterator(buildWatchesWithEval( Iterator(() => buildWatchesWithEval(
PreXGBoost.getCacheDirName(xgbExeParams.useExternalMemory), xgbExeParams.missing, PreXGBoost.getCacheDirName(xgbExeParams.useExternalMemory), xgbExeParams.missing,
nameAndColIndices, nameAndColumnBatchIter, maxBin)) nameAndColIndices, nameAndColumnBatchIter, maxBin))
} }

53
jvm-packages/xgboost4j-spark/src/main/scala/ml/dmlc/xgboost4j/scala/spark/PreXGBoost.scala
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@ -96,19 +96,21 @@ object PreXGBoost extends PreXGBoostProvider {
} }
/** /**
* Convert the Dataset[_] to RDD[Watches] which will be fed to XGBoost * Convert the Dataset[_] to RDD[() => Watches] which will be fed to XGBoost
* *
* @param estimator supports XGBoostClassifier and XGBoostRegressor * @param estimator supports XGBoostClassifier and XGBoostRegressor
* @param dataset the training data * @param dataset the training data
* @param params all user defined and defaulted params * @param params all user defined and defaulted params
* @return [[XGBoostExecutionParams]] => (RDD[[Watches]], Option[ RDD[_] ]) * @return [[XGBoostExecutionParams]] => (Boolean, RDD[[() => Watches]], Option[ RDD[_] ])
* RDD[Watches] will be used as the training input * Boolean if building DMatrix in rabit context
* RDD[() => Watches] will be used as the training input
* Option[RDD[_]\] is the optional cached RDD * Option[RDD[_]\] is the optional cached RDD
*/ */
override def buildDatasetToRDD( override def buildDatasetToRDD(
estimator: Estimator[_], estimator: Estimator[_],
dataset: Dataset[_], dataset: Dataset[_],
params: Map[String, Any]): XGBoostExecutionParams => (RDD[Watches], Option[RDD[_]]) = { params: Map[String, Any]): XGBoostExecutionParams =>
(Boolean, RDD[() => Watches], Option[RDD[_]]) = {
if (optionProvider.isDefined && optionProvider.get.providerEnabled(Some(dataset))) { if (optionProvider.isDefined && optionProvider.get.providerEnabled(Some(dataset))) {
return optionProvider.get.buildDatasetToRDD(estimator, dataset, params) return optionProvider.get.buildDatasetToRDD(estimator, dataset, params)
@ -170,12 +172,12 @@ object PreXGBoost extends PreXGBoostProvider {
val cachedRDD = if (xgbExecParams.cacheTrainingSet) { val cachedRDD = if (xgbExecParams.cacheTrainingSet) {
Some(trainingData.persist(StorageLevel.MEMORY_AND_DISK)) Some(trainingData.persist(StorageLevel.MEMORY_AND_DISK))
} else None } else None
(trainForRanking(trainingData, xgbExecParams, evalRDDMap), cachedRDD) (false, trainForRanking(trainingData, xgbExecParams, evalRDDMap), cachedRDD)
case Right(trainingData) => case Right(trainingData) =>
val cachedRDD = if (xgbExecParams.cacheTrainingSet) { val cachedRDD = if (xgbExecParams.cacheTrainingSet) {
Some(trainingData.persist(StorageLevel.MEMORY_AND_DISK)) Some(trainingData.persist(StorageLevel.MEMORY_AND_DISK))
} else None } else None
(trainForNonRanking(trainingData, xgbExecParams, evalRDDMap), cachedRDD) (false, trainForNonRanking(trainingData, xgbExecParams, evalRDDMap), cachedRDD)
} }
} }
@ -311,17 +313,18 @@ object PreXGBoost extends PreXGBoostProvider {
/** /**
* Converting the RDD[XGBLabeledPoint] to the function to build RDD[Watches] * Converting the RDD[XGBLabeledPoint] to the function to build RDD[() => Watches]
* *
* @param trainingSet the input training RDD[XGBLabeledPoint] * @param trainingSet the input training RDD[XGBLabeledPoint]
* @param evalRDDMap the eval set * @param evalRDDMap the eval set
* @param hasGroup if has group * @param hasGroup if has group
* @return function to build (RDD[Watches], the cached RDD) * @return function to build (RDD[() => Watches], the cached RDD)
*/ */
private[spark] def buildRDDLabeledPointToRDDWatches( private[spark] def buildRDDLabeledPointToRDDWatches(
trainingSet: RDD[XGBLabeledPoint], trainingSet: RDD[XGBLabeledPoint],
evalRDDMap: Map[String, RDD[XGBLabeledPoint]] = Map(), evalRDDMap: Map[String, RDD[XGBLabeledPoint]] = Map(),
hasGroup: Boolean = false): XGBoostExecutionParams => (RDD[Watches], Option[RDD[_]]) = { hasGroup: Boolean = false):
XGBoostExecutionParams => (Boolean, RDD[() => Watches], Option[RDD[_]]) = {
xgbExecParams: XGBoostExecutionParams => xgbExecParams: XGBoostExecutionParams =>
composeInputData(trainingSet, hasGroup, xgbExecParams.numWorkers) match { composeInputData(trainingSet, hasGroup, xgbExecParams.numWorkers) match {
@ -329,12 +332,12 @@ object PreXGBoost extends PreXGBoostProvider {
val cachedRDD = if (xgbExecParams.cacheTrainingSet) { val cachedRDD = if (xgbExecParams.cacheTrainingSet) {
Some(trainingData.persist(StorageLevel.MEMORY_AND_DISK)) Some(trainingData.persist(StorageLevel.MEMORY_AND_DISK))
} else None } else None
(trainForRanking(trainingData, xgbExecParams, evalRDDMap), cachedRDD) (false, trainForRanking(trainingData, xgbExecParams, evalRDDMap), cachedRDD)
case Right(trainingData) => case Right(trainingData) =>
val cachedRDD = if (xgbExecParams.cacheTrainingSet) { val cachedRDD = if (xgbExecParams.cacheTrainingSet) {
Some(trainingData.persist(StorageLevel.MEMORY_AND_DISK)) Some(trainingData.persist(StorageLevel.MEMORY_AND_DISK))
} else None } else None
(trainForNonRanking(trainingData, xgbExecParams, evalRDDMap), cachedRDD) (false, trainForNonRanking(trainingData, xgbExecParams, evalRDDMap), cachedRDD)
} }
} }
@ -374,34 +377,34 @@ object PreXGBoost extends PreXGBoostProvider {
} }
/** /**
* Build RDD[Watches] for Ranking * Build RDD[() => Watches] for Ranking
* @param trainingData the training data RDD * @param trainingData the training data RDD
* @param xgbExecutionParams xgboost execution params * @param xgbExecutionParams xgboost execution params
* @param evalSetsMap the eval RDD * @param evalSetsMap the eval RDD
* @return RDD[Watches] * @return RDD[() => Watches]
*/ */
private def trainForRanking( private def trainForRanking(
trainingData: RDD[Array[XGBLabeledPoint]], trainingData: RDD[Array[XGBLabeledPoint]],
xgbExecutionParam: XGBoostExecutionParams, xgbExecutionParam: XGBoostExecutionParams,
evalSetsMap: Map[String, RDD[XGBLabeledPoint]]): RDD[Watches] = { evalSetsMap: Map[String, RDD[XGBLabeledPoint]]): RDD[() => Watches] = {
if (evalSetsMap.isEmpty) { if (evalSetsMap.isEmpty) {
trainingData.mapPartitions(labeledPointGroups => { trainingData.mapPartitions(labeledPointGroups => {
val watches = Watches.buildWatchesWithGroup(xgbExecutionParam, val buildWatches = () => Watches.buildWatchesWithGroup(xgbExecutionParam,
DataUtils.processMissingValuesWithGroup(labeledPointGroups, xgbExecutionParam.missing, DataUtils.processMissingValuesWithGroup(labeledPointGroups, xgbExecutionParam.missing,
xgbExecutionParam.allowNonZeroForMissing), xgbExecutionParam.allowNonZeroForMissing),
getCacheDirName(xgbExecutionParam.useExternalMemory)) getCacheDirName(xgbExecutionParam.useExternalMemory))
Iterator.single(watches) Iterator.single(buildWatches)
}).cache() }).cache()
} else { } else {
coPartitionGroupSets(trainingData, evalSetsMap, xgbExecutionParam.numWorkers).mapPartitions( coPartitionGroupSets(trainingData, evalSetsMap, xgbExecutionParam.numWorkers).mapPartitions(
labeledPointGroupSets => { labeledPointGroupSets => {
val watches = Watches.buildWatchesWithGroup( val buildWatches = () => Watches.buildWatchesWithGroup(
labeledPointGroupSets.map { labeledPointGroupSets.map {
case (name, iter) => (name, DataUtils.processMissingValuesWithGroup(iter, case (name, iter) => (name, DataUtils.processMissingValuesWithGroup(iter,
xgbExecutionParam.missing, xgbExecutionParam.allowNonZeroForMissing)) xgbExecutionParam.missing, xgbExecutionParam.allowNonZeroForMissing))
}, },
getCacheDirName(xgbExecutionParam.useExternalMemory)) getCacheDirName(xgbExecutionParam.useExternalMemory))
Iterator.single(watches) Iterator.single(buildWatches)
}).cache() }).cache()
} }
} }
@ -462,35 +465,35 @@ object PreXGBoost extends PreXGBoostProvider {
} }
/** /**
* Build RDD[Watches] for Non-Ranking * Build RDD[() => Watches] for Non-Ranking
* @param trainingData the training data RDD * @param trainingData the training data RDD
* @param xgbExecutionParams xgboost execution params * @param xgbExecutionParams xgboost execution params
* @param evalSetsMap the eval RDD * @param evalSetsMap the eval RDD
* @return RDD[Watches] * @return RDD[() => Watches]
*/ */
private def trainForNonRanking( private def trainForNonRanking(
trainingData: RDD[XGBLabeledPoint], trainingData: RDD[XGBLabeledPoint],
xgbExecutionParams: XGBoostExecutionParams, xgbExecutionParams: XGBoostExecutionParams,
evalSetsMap: Map[String, RDD[XGBLabeledPoint]]): RDD[Watches] = { evalSetsMap: Map[String, RDD[XGBLabeledPoint]]): RDD[() => Watches] = {
if (evalSetsMap.isEmpty) { if (evalSetsMap.isEmpty) {
trainingData.mapPartitions { labeledPoints => { trainingData.mapPartitions { labeledPoints => {
val watches = Watches.buildWatches(xgbExecutionParams, val buildWatches = () => Watches.buildWatches(xgbExecutionParams,
DataUtils.processMissingValues(labeledPoints, xgbExecutionParams.missing, DataUtils.processMissingValues(labeledPoints, xgbExecutionParams.missing,
xgbExecutionParams.allowNonZeroForMissing), xgbExecutionParams.allowNonZeroForMissing),
getCacheDirName(xgbExecutionParams.useExternalMemory)) getCacheDirName(xgbExecutionParams.useExternalMemory))
Iterator.single(watches) Iterator.single(buildWatches)
}}.cache() }}.cache()
} else { } else {
coPartitionNoGroupSets(trainingData, evalSetsMap, xgbExecutionParams.numWorkers). coPartitionNoGroupSets(trainingData, evalSetsMap, xgbExecutionParams.numWorkers).
mapPartitions { mapPartitions {
nameAndLabeledPointSets => nameAndLabeledPointSets =>
val watches = Watches.buildWatches( val buildWatches = () => Watches.buildWatches(
nameAndLabeledPointSets.map { nameAndLabeledPointSets.map {
case (name, iter) => (name, DataUtils.processMissingValues(iter, case (name, iter) => (name, DataUtils.processMissingValues(iter,
xgbExecutionParams.missing, xgbExecutionParams.allowNonZeroForMissing)) xgbExecutionParams.missing, xgbExecutionParams.allowNonZeroForMissing))
}, },
getCacheDirName(xgbExecutionParams.useExternalMemory)) getCacheDirName(xgbExecutionParams.useExternalMemory))
Iterator.single(watches) Iterator.single(buildWatches)
}.cache() }.cache()
} }
} }

12
jvm-packages/xgboost4j-spark/src/main/scala/ml/dmlc/xgboost4j/scala/spark/PreXGBoostProvider.scala
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@ -1,5 +1,5 @@
/* /*
Copyright (c) 2021 by Contributors Copyright (c) 2021-2022 by Contributors
Licensed under the Apache License, Version 2.0 (the "License"); Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License. you may not use this file except in compliance with the License.
@ -45,19 +45,21 @@ private[scala] trait PreXGBoostProvider {
def transformSchema(xgboostEstimator: XGBoostEstimatorCommon, schema: StructType): StructType def transformSchema(xgboostEstimator: XGBoostEstimatorCommon, schema: StructType): StructType
/** /**
* Convert the Dataset[_] to RDD[Watches] which will be fed to XGBoost * Convert the Dataset[_] to RDD[() => Watches] which will be fed to XGBoost
* *
* @param estimator supports XGBoostClassifier and XGBoostRegressor * @param estimator supports XGBoostClassifier and XGBoostRegressor
* @param dataset the training data * @param dataset the training data
* @param params all user defined and defaulted params * @param params all user defined and defaulted params
* @return [[XGBoostExecutionParams]] => (RDD[[Watches]], Option[ RDD[_] ]) * @return [[XGBoostExecutionParams]] => (Boolean, RDD[[() => Watches]], Option[ RDD[_] ])
* RDD[Watches] will be used as the training input * Boolean if building DMatrix in rabit context
* RDD[() => Watches] will be used as the training input to build DMatrix
* Option[ RDD[_] ] is the optional cached RDD * Option[ RDD[_] ] is the optional cached RDD
*/ */
def buildDatasetToRDD( def buildDatasetToRDD(
estimator: Estimator[_], estimator: Estimator[_],
dataset: Dataset[_], dataset: Dataset[_],
params: Map[String, Any]): XGBoostExecutionParams => (RDD[Watches], Option[RDD[_]]) params: Map[String, Any]):
XGBoostExecutionParams => (Boolean, RDD[() => Watches], Option[RDD[_]])
/** /**
* Transform Dataset * Transform Dataset

47
jvm-packages/xgboost4j-spark/src/main/scala/ml/dmlc/xgboost4j/scala/spark/XGBoost.scala
View File

@ -283,13 +283,8 @@ object XGBoost extends Serializable {
} }
} }
private def buildDistributedBooster( private def buildWatchesAndCheck(buildWatchesFun: () => Watches): Watches = {
watches: Watches, val watches = buildWatchesFun()
xgbExecutionParam: XGBoostExecutionParams,
rabitEnv: java.util.Map[String, String],
obj: ObjectiveTrait,
eval: EvalTrait,
prevBooster: Booster): Iterator[(Booster, Map[String, Array[Float]])] = {
// to workaround the empty partitions in training dataset, // to workaround the empty partitions in training dataset,
// this might not be the best efficient implementation, see // this might not be the best efficient implementation, see
// (https://github.com/dmlc/xgboost/issues/1277) // (https://github.com/dmlc/xgboost/issues/1277)
@ -298,14 +293,39 @@ object XGBoost extends Serializable {
s"detected an empty partition in the training data, partition ID:" + s"detected an empty partition in the training data, partition ID:" +
s" ${TaskContext.getPartitionId()}") s" ${TaskContext.getPartitionId()}")
} }
watches
}
private def buildDistributedBooster(
buildDMatrixInRabit: Boolean,
buildWatches: () => Watches,
xgbExecutionParam: XGBoostExecutionParams,
rabitEnv: java.util.Map[String, String],
obj: ObjectiveTrait,
eval: EvalTrait,
prevBooster: Booster): Iterator[(Booster, Map[String, Array[Float]])] = {
var watches: Watches = null
if (!buildDMatrixInRabit) {
// for CPU pipeline, we need to build DMatrix out of rabit context
watches = buildWatchesAndCheck(buildWatches)
}
val taskId = TaskContext.getPartitionId().toString val taskId = TaskContext.getPartitionId().toString
val attempt = TaskContext.get().attemptNumber.toString val attempt = TaskContext.get().attemptNumber.toString
rabitEnv.put("DMLC_TASK_ID", taskId) rabitEnv.put("DMLC_TASK_ID", taskId)
rabitEnv.put("DMLC_NUM_ATTEMPT", attempt) rabitEnv.put("DMLC_NUM_ATTEMPT", attempt)
val numRounds = xgbExecutionParam.numRounds val numRounds = xgbExecutionParam.numRounds
val makeCheckpoint = xgbExecutionParam.checkpointParam.isDefined && taskId.toInt == 0 val makeCheckpoint = xgbExecutionParam.checkpointParam.isDefined && taskId.toInt == 0
try { try {
Rabit.init(rabitEnv) Rabit.init(rabitEnv)
if (buildDMatrixInRabit) {
// for GPU pipeline, we need to move dmatrix building into rabit context
watches = buildWatchesAndCheck(buildWatches)
}
val numEarlyStoppingRounds = xgbExecutionParam.earlyStoppingParams.numEarlyStoppingRounds val numEarlyStoppingRounds = xgbExecutionParam.earlyStoppingParams.numEarlyStoppingRounds
val metrics = Array.tabulate(watches.size)(_ => Array.ofDim[Float](numRounds)) val metrics = Array.tabulate(watches.size)(_ => Array.ofDim[Float](numRounds))
val externalCheckpointParams = xgbExecutionParam.checkpointParam val externalCheckpointParams = xgbExecutionParam.checkpointParam
@ -338,7 +358,7 @@ object XGBoost extends Serializable {
throw xgbException throw xgbException
} finally { } finally {
Rabit.shutdown() Rabit.shutdown()
watches.delete() if (watches != null) watches.delete()
} }
} }
@ -364,7 +384,7 @@ object XGBoost extends Serializable {
@throws(classOf[XGBoostError]) @throws(classOf[XGBoostError])
private[spark] def trainDistributed( private[spark] def trainDistributed(
sc: SparkContext, sc: SparkContext,
buildTrainingData: XGBoostExecutionParams => (RDD[Watches], Option[RDD[_]]), buildTrainingData: XGBoostExecutionParams => (Boolean, RDD[() => Watches], Option[RDD[_]]),
params: Map[String, Any]): params: Map[String, Any]):
(Booster, Map[String, Array[Float]]) = { (Booster, Map[String, Array[Float]]) = {
@ -383,7 +403,7 @@ object XGBoost extends Serializable {
}.orNull }.orNull
// Get the training data RDD and the cachedRDD // Get the training data RDD and the cachedRDD
val (trainingRDD, optionalCachedRDD) = buildTrainingData(xgbExecParams) val (buildDMatrixInRabit, trainingRDD, optionalCachedRDD) = buildTrainingData(xgbExecParams)
try { try {
// Train for every ${savingRound} rounds and save the partially completed booster // Train for every ${savingRound} rounds and save the partially completed booster
@ -398,15 +418,16 @@ object XGBoost extends Serializable {
val rabitEnv = tracker.getWorkerEnvs val rabitEnv = tracker.getWorkerEnvs
val boostersAndMetrics = trainingRDD.mapPartitions { iter => { val boostersAndMetrics = trainingRDD.mapPartitions { iter => {
var optionWatches: Option[Watches] = None var optionWatches: Option[() => Watches] = None
// take the first Watches to train // take the first Watches to train
if (iter.hasNext) { if (iter.hasNext) {
optionWatches = Some(iter.next()) optionWatches = Some(iter.next())
} }
optionWatches.map { watches => buildDistributedBooster(watches, xgbExecParams, rabitEnv, optionWatches.map { buildWatches => buildDistributedBooster(buildDMatrixInRabit,
xgbExecParams.obj, xgbExecParams.eval, prevBooster)} buildWatches, xgbExecParams, rabitEnv, xgbExecParams.obj,
xgbExecParams.eval, prevBooster)}
.getOrElse(throw new RuntimeException("No Watches to train")) .getOrElse(throw new RuntimeException("No Watches to train"))
}}.cache() }}.cache()

2
jvm-packages/xgboost4j-spark/src/test/scala/ml/dmlc/xgboost4j/scala/spark/XGBoostRabitRegressionSuite.scala
View File

@ -119,6 +119,8 @@ class XGBoostRabitRegressionSuite extends FunSuite with PerTest {
} }
test("test SparkContext should not be killed ") { test("test SparkContext should not be killed ") {
cancel("For some reason, sparkContext can't cancel the job locally in the CI env," +
"which will be resolved when introducing barrier mode")
val training = buildDataFrame(Classification.train) val training = buildDataFrame(Classification.train)
// mock rank 0 failure during 8th allreduce synchronization // mock rank 0 failure during 8th allreduce synchronization
Rabit.mockList = Array("0,8,0,0").toList.asJava Rabit.mockList = Array("0,8,0,0").toList.asJava