YuweiXiao commented on code in PR #4958: URL: https://github.com/apache/hudi/pull/4958#discussion_r917397551
########## hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/client/clustering/update/strategy/SparkConsistentHashingDuplicateUpdateStrategy.java: ########## @@ -0,0 +1,146 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.hudi.client.clustering.update.strategy; + +import org.apache.hudi.avro.model.HoodieClusteringGroup; +import org.apache.hudi.avro.model.HoodieClusteringPlan; +import org.apache.hudi.client.clustering.plan.strategy.SparkConsistentBucketClusteringPlanStrategy; +import org.apache.hudi.common.data.HoodieData; +import org.apache.hudi.common.engine.HoodieEngineContext; +import org.apache.hudi.common.fs.FSUtils; +import org.apache.hudi.common.model.ConsistentHashingNode; +import org.apache.hudi.common.model.HoodieAvroRecord; +import org.apache.hudi.common.model.HoodieConsistentHashingMetadata; +import org.apache.hudi.common.model.HoodieFileGroupId; +import org.apache.hudi.common.model.HoodieRecord; +import org.apache.hudi.common.model.HoodieRecordLocation; +import org.apache.hudi.common.model.HoodieRecordPayload; +import org.apache.hudi.common.table.timeline.HoodieInstant; +import org.apache.hudi.common.table.timeline.HoodieTimeline; +import org.apache.hudi.common.util.ClusteringUtils; +import org.apache.hudi.common.util.Option; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.common.util.collection.Pair; +import org.apache.hudi.exception.HoodieException; +import org.apache.hudi.index.HoodieIndexUtils; +import org.apache.hudi.index.bucket.ConsistentBucketIdentifier; +import org.apache.hudi.index.bucket.HoodieSparkConsistentBucketIndex; +import org.apache.hudi.table.HoodieTable; +import org.apache.hudi.table.action.cluster.strategy.UpdateStrategy; + +import org.apache.log4j.LogManager; +import org.apache.log4j.Logger; + +import java.util.Arrays; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; +import java.util.stream.Stream; + +/** + * Update strategy for (consistent hashing) bucket index + * If updates to file groups that are under clustering are identified, then generate + * two same records for each update, routing to both old and new file groups + */ +public class SparkConsistentHashingDuplicateUpdateStrategy<T extends HoodieRecordPayload<T>> extends UpdateStrategy<T, HoodieData<HoodieRecord<T>>> { + + private static final Logger LOG = LogManager.getLogger(SparkConsistentHashingDuplicateUpdateStrategy.class); + + public SparkConsistentHashingDuplicateUpdateStrategy(HoodieEngineContext engineContext, HoodieTable table, Set<HoodieFileGroupId> fileGroupsInPendingClustering) { + super(engineContext, table, fileGroupsInPendingClustering); + } + + @Override + public Pair<HoodieData<HoodieRecord<T>>, Set<HoodieFileGroupId>> handleUpdate(HoodieData<HoodieRecord<T>> taggedRecordsRDD) { + if (fileGroupsInPendingClustering.isEmpty()) { + return Pair.of(taggedRecordsRDD, Collections.emptySet()); + } + + HoodieData<HoodieRecord<T>> filteredRecordsRDD = taggedRecordsRDD.filter(r -> { + ValidationUtils.checkState(r.getCurrentLocation() != null); + return fileGroupsInPendingClustering.contains(new HoodieFileGroupId(r.getPartitionPath(), r.getCurrentLocation().getFileId())); + }); + + if (filteredRecordsRDD.count() == 0) { + return Pair.of(taggedRecordsRDD, Collections.emptySet()); + } + + // Read all pending/ongoing clustering plans + List<Pair<HoodieInstant, HoodieClusteringPlan>> instantPlanPairs = + table.getMetaClient().getActiveTimeline().filterInflightsAndRequested().filter(instant -> instant.getAction().equals(HoodieTimeline.REPLACE_COMMIT_ACTION)).getInstants() + .map(instant -> ClusteringUtils.getClusteringPlan(table.getMetaClient(), instant)) + .flatMap(o -> o.isPresent() ? Stream.of(o.get()) : Stream.empty()) + .collect(Collectors.toList()); + + // Construct child node for each partition & build the bucket identifier + final Set<String> partitions = new HashSet<>(filteredRecordsRDD.map(HoodieRecord::getPartitionPath).distinct().collectAsList()); + Map<String, HoodieConsistentHashingMetadata> partitionToHashingMeta = new HashMap<>(); + Map<String, String> partitionToInstant = new HashMap<>(); + for (Pair<HoodieInstant, HoodieClusteringPlan> pair : instantPlanPairs) { + String instant = pair.getLeft().getTimestamp(); + HoodieClusteringPlan plan = pair.getRight(); + extractHashingMetadataFromClusteringPlan(instant, plan, partitions, partitionToHashingMeta, partitionToInstant); + } + Map<String, ConsistentBucketIdentifier> partitionToIdentifier = partitionToHashingMeta.entrySet().stream() + .collect(Collectors.toMap(Map.Entry::getKey, e -> new ConsistentBucketIdentifier(e.getValue()))); + + // Produce records tagged with new record location + List<String> indexKeyFields = Arrays.asList(table.getConfig().getBucketIndexHashField().split(",")); + HoodieData<HoodieRecord<T>> redirectedRecordsRDD = filteredRecordsRDD.map(r -> { + ConsistentHashingNode node = partitionToIdentifier.get(r.getPartitionPath()).getBucket(r.getKey(), indexKeyFields); + return HoodieIndexUtils.getTaggedRecord(new HoodieAvroRecord(r.getKey(), r.getData(), r.getOperation()), + Option.ofNullable(new HoodieRecordLocation(partitionToInstant.get(r.getPartitionPath()), FSUtils.createNewFileId(node.getFileIdPrefix(), 0)))); + }); + + // Return combined iterator (the original and records with new location) + return Pair.of(taggedRecordsRDD.union(redirectedRecordsRDD), Collections.emptySet()); + } + + private void extractHashingMetadataFromClusteringPlan(String instant, HoodieClusteringPlan plan, final Set<String> recordPartitions, + Map<String, HoodieConsistentHashingMetadata> partitionToHashingMeta, Map<String, String> partitionToInstant) { + for (HoodieClusteringGroup group : plan.getInputGroups()) { + Map<String, String> groupMeta = group.getExtraMetadata(); + String p = groupMeta.get(SparkConsistentBucketClusteringPlanStrategy.METADATA_PARTITION_KEY); Review Comment: Thanks, I will add a Validation check here as it should not be null here. -- This is an automated message from the Apache Git Service. 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