Jackie-Jiang commented on code in PR #13347: URL: https://github.com/apache/pinot/pull/13347#discussion_r1712425074
########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.java: ########## @@ -0,0 +1,391 @@ +/** + * 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.pinot.segment.local.upsert; + +import com.google.common.annotations.VisibleForTesting; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Objects; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicInteger; +import javax.annotation.Nullable; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.pinot.common.metrics.ServerMeter; +import org.apache.pinot.segment.local.indexsegment.immutable.ImmutableSegmentImpl; +import org.apache.pinot.segment.local.segment.readers.LazyRow; +import org.apache.pinot.segment.local.utils.HashUtils; +import org.apache.pinot.segment.spi.ImmutableSegment; +import org.apache.pinot.segment.spi.IndexSegment; +import org.apache.pinot.segment.spi.MutableSegment; +import org.apache.pinot.segment.spi.index.mutable.ThreadSafeMutableRoaringBitmap; +import org.apache.pinot.spi.data.readers.GenericRow; +import org.apache.pinot.spi.data.readers.PrimaryKey; +import org.roaringbitmap.buffer.MutableRoaringBitmap; + + +/** + * Implementation of {@link PartitionUpsertMetadataManager} that is backed by a {@link ConcurrentHashMap} and ensures + * consistent deletions. This should be used when the table is configured with 'enableConsistentDeletes' set to true. + * + * Consistent deletion ensures that when deletedKeysTTL is enabled with UpsertCompaction, the key metadata is + * removed from the HashMap only after all other records in the old segments are compacted. This guarantees + * data consistency. Without this, there can be a scenario where a deleted record is compacted first, while an + * old record remains non-compacted in a previous segment. During a server restart, this could lead to the old + * record reappearing. For the end-user, this would result in a data loss or inconsistency scenario, as the + * record was marked for deletion. + */ +@SuppressWarnings({"rawtypes", "unchecked"}) +@ThreadSafe +public class ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes + extends BasePartitionUpsertMetadataManager { + + @VisibleForTesting + final ConcurrentHashMap<Object, ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation> + _primaryKeyToRecordLocationMap = new ConcurrentHashMap<>(); + // Used to initialize a reference to previous row for merging in partial upsert + private final LazyRow _reusePreviousRow = new LazyRow(); + private final Map<String, Object> _reuseMergeResultHolder = new HashMap<>(); + + public ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes(String tableNameWithType, int partitionId, + UpsertContext context) { + super(tableNameWithType, partitionId, context); + } + + @Override + protected long getNumPrimaryKeys() { + return _primaryKeyToRecordLocationMap.size(); + } + + @Override + protected void doAddOrReplaceSegment(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator, + @Nullable IndexSegment oldSegment, @Nullable MutableRoaringBitmap validDocIdsForOldSegment) { + String segmentName = segment.getSegmentName(); + segment.enableUpsert(this, validDocIds, queryableDocIds); + + AtomicInteger numKeysInWrongSegment = new AtomicInteger(); + while (recordInfoIterator.hasNext()) { + RecordInfo recordInfo = recordInfoIterator.next(); + int newDocId = recordInfo.getDocId(); + Comparable newComparisonValue = recordInfo.getComparisonValue(); + _primaryKeyToRecordLocationMap.compute(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (primaryKey, currentRecordLocation) -> { + if (currentRecordLocation != null) { + // Existing primary key + IndexSegment currentSegment = currentRecordLocation.getSegment(); + int currentDocId = currentRecordLocation.getDocId(); + Comparable currentComparisonValue = currentRecordLocation.getComparisonValue(); + int comparisonResult = newComparisonValue.compareTo(currentComparisonValue); + int currentDistinctSegmentCount = currentRecordLocation.getDistinctSegmentCount(); + + // The current record is in the same segment + // Update the record location when there is a tie to keep the newer record. Note that the record info + // iterator will return records with incremental doc ids. + if (currentSegment == segment) { + if (comparisonResult >= 0) { + replaceDocId(segment, validDocIds, queryableDocIds, currentDocId, newDocId, recordInfo); + return new ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation(segment, + newDocId, newComparisonValue, currentDistinctSegmentCount); + } else { + return currentRecordLocation; + } + } + + // The current record is in an old segment being replaced + // This could happen when committing a consuming segment, or reloading a completed segment. In this + // case, we want to update the record location when there is a tie because the record locations should + // point to the new added segment instead of the old segment being replaced. Also, do not update the valid + // doc ids for the old segment because it has not been replaced yet. We pass in an optional valid doc ids + // snapshot for the old segment, which can be updated and used to track the docs not replaced yet. + if (currentSegment == oldSegment) { + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + if (validDocIdsForOldSegment != null) { + validDocIdsForOldSegment.remove(currentDocId); + } + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } + + // This should not happen because the previously replaced segment should have all keys removed. We still + // handle it here, and also track the number of keys not properly replaced previously. + String currentSegmentName = currentSegment.getSegmentName(); + if (currentSegmentName.equals(segmentName)) { + numKeysInWrongSegment.getAndIncrement(); + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return currentRecordLocation; + } + } + + // The current record is in a different segment + // Update the record location when getting a newer comparison value, or the value is the same as the + // current value, but the segment has a larger sequence number (the segment is newer than the current + // segment). + if (comparisonResult > 0 || (comparisonResult == 0 && shouldReplaceOnComparisonTie(segmentName, + currentSegmentName, segment.getSegmentMetadata().getIndexCreationTime(), + currentSegment.getSegmentMetadata().getIndexCreationTime()))) { + replaceDocId(segment, validDocIds, queryableDocIds, currentSegment, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } else { + // New primary key + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, 1); + } + }); + } + int numKeys = numKeysInWrongSegment.get(); + if (numKeys > 0) { + _logger.warn("Found {} primary keys in the wrong segment when adding segment: {}", numKeys, segmentName); + _serverMetrics.addMeteredTableValue(_tableNameWithType, ServerMeter.UPSERT_KEYS_IN_WRONG_SEGMENT, numKeys); + } + } + + @Override + protected void addSegmentWithoutUpsert(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator) { + throw new UnsupportedOperationException("Consistent-deletion does not support preloading of segments."); + } + + @Override + protected void doRemoveSegment(IndexSegment segment) { + String segmentName = segment.getSegmentName(); + _logger.info("Removing {} segment: {}, current primary key count: {}", + segment instanceof ImmutableSegment ? "immutable" : "mutable", segmentName, getNumPrimaryKeys()); + long startTimeMs = System.currentTimeMillis(); + + try ( + UpsertUtils.PrimaryKeyReader primaryKeyReader = new UpsertUtils.PrimaryKeyReader(segment, _primaryKeyColumns)) { + removeSegment(segment, + UpsertUtils.getPrimaryKeyIterator(primaryKeyReader, segment.getSegmentMetadata().getTotalDocs())); + } catch (Exception e) { + throw new RuntimeException( + String.format("Caught exception while removing segment: %s, table: %s", segment.getSegmentName(), + _tableNameWithType), e); + } + + // Update metrics + long numPrimaryKeys = getNumPrimaryKeys(); + updatePrimaryKeyGauge(numPrimaryKeys); + _logger.info("Finished removing segment: {} in {}ms, current primary key count: {}", segmentName, + System.currentTimeMillis() - startTimeMs, numPrimaryKeys); + } + + @Override + protected void removeSegment(IndexSegment segment, Iterator<PrimaryKey> primaryKeyIterator) { + Set<Object> deDuplicatedPrimaryKeys = new HashSet<>(); + while (primaryKeyIterator.hasNext()) { + PrimaryKey primaryKey = primaryKeyIterator.next(); + _primaryKeyToRecordLocationMap.computeIfPresent(HashUtils.hashPrimaryKey(primaryKey, _hashFunction), + (pk, recordLocation) -> { + if (deDuplicatedPrimaryKeys.contains(pk)) { + return recordLocation; + } + deDuplicatedPrimaryKeys.add(pk); + if (recordLocation.getSegment() == segment) { + return null; + } + return new RecordLocation(recordLocation.getSegment(), recordLocation.getDocId(), + recordLocation.getComparisonValue(), + RecordLocation.decrementSegmentCount(recordLocation.getDistinctSegmentCount())); + }); + } + } + + @Override + public void doRemoveExpiredPrimaryKeys() { + AtomicInteger numDeletedTTLKeysRemoved = new AtomicInteger(); + double largestSeenComparisonValue = _largestSeenComparisonValue.get(); + double deletedKeysThreshold; + if (_deletedKeysTTL > 0) { + deletedKeysThreshold = largestSeenComparisonValue - _deletedKeysTTL; + } else { + deletedKeysThreshold = Double.MIN_VALUE; + } + + _primaryKeyToRecordLocationMap.forEach((primaryKey, recordLocation) -> { + double comparisonValue = ((Number) recordLocation.getComparisonValue()).doubleValue(); + // We need to verify that the record belongs to only one segment. If a record is part of multiple segments, + // an issue can arise where the upsert compaction might first process the segment containing the delete record + // while the previous segment(s) are not compacted. Upon restart, this can inadvertently revive the key + // that was originally marked for deletion. + if (_deletedKeysTTL > 0 && comparisonValue < deletedKeysThreshold + && recordLocation.getDistinctSegmentCount() <= 1) { + ThreadSafeMutableRoaringBitmap currentQueryableDocIds = recordLocation.getSegment().getQueryableDocIds(); + // if key not part of queryable doc id, it means it is deleted + if (currentQueryableDocIds != null && !currentQueryableDocIds.contains(recordLocation.getDocId())) { + _primaryKeyToRecordLocationMap.remove(primaryKey, recordLocation); + removeDocId(recordLocation.getSegment(), recordLocation.getDocId()); + numDeletedTTLKeysRemoved.getAndIncrement(); + } + } + }); + + // Update metrics + updatePrimaryKeyGauge(); + int numDeletedTTLKeys = numDeletedTTLKeysRemoved.get(); + if (numDeletedTTLKeys > 0) { + _logger.info("Deleted {} primary keys based on deletedKeysTTL", numDeletedTTLKeys); + _serverMetrics.addMeteredTableValue(_tableNameWithType, ServerMeter.DELETED_KEYS_TTL_PRIMARY_KEYS_REMOVED, + numDeletedTTLKeys); + } + } + + @Override + protected boolean doAddRecord(MutableSegment segment, RecordInfo recordInfo) { + AtomicBoolean isOutOfOrderRecord = new AtomicBoolean(false); + ThreadSafeMutableRoaringBitmap validDocIds = Objects.requireNonNull(segment.getValidDocIds()); + ThreadSafeMutableRoaringBitmap queryableDocIds = segment.getQueryableDocIds(); + int newDocId = recordInfo.getDocId(); + Comparable newComparisonValue = recordInfo.getComparisonValue(); + + // When TTL is enabled, update largestSeenComparisonValue when adding new record + if (_deletedKeysTTL > 0) { + double comparisonValue = ((Number) newComparisonValue).doubleValue(); + _largestSeenComparisonValue.getAndUpdate(v -> Math.max(v, comparisonValue)); + } + + _primaryKeyToRecordLocationMap.compute(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (primaryKey, currentRecordLocation) -> { + if (currentRecordLocation != null) { + // Existing primary key + IndexSegment currentSegment = currentRecordLocation.getSegment(); + // Update the record location when the new comparison value is greater than or equal to the current value. + // Update the record location when there is a tie to keep the newer record. + if (newComparisonValue.compareTo(currentRecordLocation.getComparisonValue()) >= 0) { + int currentDocId = currentRecordLocation.getDocId(); + if (segment == currentSegment) { + replaceDocId(segment, validDocIds, queryableDocIds, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + currentRecordLocation.getDistinctSegmentCount()); + } else { + replaceDocId(segment, validDocIds, queryableDocIds, currentSegment, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentRecordLocation.getDistinctSegmentCount())); + } + } else { + // Out-of-order record + handleOutOfOrderEvent(currentRecordLocation.getComparisonValue(), recordInfo.getComparisonValue()); + isOutOfOrderRecord.set(true); + if (segment == currentSegment) { + return currentRecordLocation; + } else { + return new RecordLocation(currentSegment, currentRecordLocation.getDocId(), + currentRecordLocation.getComparisonValue(), + _context.isDropOutOfOrderRecord() ? currentRecordLocation.getDistinctSegmentCount() + : RecordLocation.incrementSegmentCount(currentRecordLocation.getDistinctSegmentCount())); + } + } + } else { + // New primary key + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, 1); + } + }); + + updatePrimaryKeyGauge(); + return !isOutOfOrderRecord.get(); + } + + @Override + protected void removeSegment(IndexSegment segment, MutableRoaringBitmap validDocIds) { Review Comment: (minor) Do you need to override this? Making it no-op is confusing ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.java: ########## @@ -0,0 +1,391 @@ +/** + * 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.pinot.segment.local.upsert; + +import com.google.common.annotations.VisibleForTesting; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Objects; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicInteger; +import javax.annotation.Nullable; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.pinot.common.metrics.ServerMeter; +import org.apache.pinot.segment.local.indexsegment.immutable.ImmutableSegmentImpl; +import org.apache.pinot.segment.local.segment.readers.LazyRow; +import org.apache.pinot.segment.local.utils.HashUtils; +import org.apache.pinot.segment.spi.ImmutableSegment; +import org.apache.pinot.segment.spi.IndexSegment; +import org.apache.pinot.segment.spi.MutableSegment; +import org.apache.pinot.segment.spi.index.mutable.ThreadSafeMutableRoaringBitmap; +import org.apache.pinot.spi.data.readers.GenericRow; +import org.apache.pinot.spi.data.readers.PrimaryKey; +import org.roaringbitmap.buffer.MutableRoaringBitmap; + + +/** + * Implementation of {@link PartitionUpsertMetadataManager} that is backed by a {@link ConcurrentHashMap} and ensures + * consistent deletions. This should be used when the table is configured with 'enableConsistentDeletes' set to true. + * + * Consistent deletion ensures that when deletedKeysTTL is enabled with UpsertCompaction, the key metadata is + * removed from the HashMap only after all other records in the old segments are compacted. This guarantees + * data consistency. Without this, there can be a scenario where a deleted record is compacted first, while an + * old record remains non-compacted in a previous segment. During a server restart, this could lead to the old + * record reappearing. For the end-user, this would result in a data loss or inconsistency scenario, as the + * record was marked for deletion. + */ +@SuppressWarnings({"rawtypes", "unchecked"}) +@ThreadSafe +public class ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes + extends BasePartitionUpsertMetadataManager { + + @VisibleForTesting + final ConcurrentHashMap<Object, ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation> + _primaryKeyToRecordLocationMap = new ConcurrentHashMap<>(); + // Used to initialize a reference to previous row for merging in partial upsert + private final LazyRow _reusePreviousRow = new LazyRow(); + private final Map<String, Object> _reuseMergeResultHolder = new HashMap<>(); + + public ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes(String tableNameWithType, int partitionId, + UpsertContext context) { + super(tableNameWithType, partitionId, context); + } + + @Override + protected long getNumPrimaryKeys() { + return _primaryKeyToRecordLocationMap.size(); + } + + @Override + protected void doAddOrReplaceSegment(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator, + @Nullable IndexSegment oldSegment, @Nullable MutableRoaringBitmap validDocIdsForOldSegment) { + String segmentName = segment.getSegmentName(); + segment.enableUpsert(this, validDocIds, queryableDocIds); + + AtomicInteger numKeysInWrongSegment = new AtomicInteger(); + while (recordInfoIterator.hasNext()) { + RecordInfo recordInfo = recordInfoIterator.next(); + int newDocId = recordInfo.getDocId(); + Comparable newComparisonValue = recordInfo.getComparisonValue(); + _primaryKeyToRecordLocationMap.compute(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (primaryKey, currentRecordLocation) -> { + if (currentRecordLocation != null) { + // Existing primary key + IndexSegment currentSegment = currentRecordLocation.getSegment(); + int currentDocId = currentRecordLocation.getDocId(); + Comparable currentComparisonValue = currentRecordLocation.getComparisonValue(); + int comparisonResult = newComparisonValue.compareTo(currentComparisonValue); + int currentDistinctSegmentCount = currentRecordLocation.getDistinctSegmentCount(); + + // The current record is in the same segment + // Update the record location when there is a tie to keep the newer record. Note that the record info + // iterator will return records with incremental doc ids. + if (currentSegment == segment) { + if (comparisonResult >= 0) { + replaceDocId(segment, validDocIds, queryableDocIds, currentDocId, newDocId, recordInfo); + return new ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation(segment, + newDocId, newComparisonValue, currentDistinctSegmentCount); + } else { + return currentRecordLocation; + } + } + + // The current record is in an old segment being replaced + // This could happen when committing a consuming segment, or reloading a completed segment. In this + // case, we want to update the record location when there is a tie because the record locations should + // point to the new added segment instead of the old segment being replaced. Also, do not update the valid + // doc ids for the old segment because it has not been replaced yet. We pass in an optional valid doc ids + // snapshot for the old segment, which can be updated and used to track the docs not replaced yet. + if (currentSegment == oldSegment) { + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + if (validDocIdsForOldSegment != null) { + validDocIdsForOldSegment.remove(currentDocId); + } + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } + + // This should not happen because the previously replaced segment should have all keys removed. We still + // handle it here, and also track the number of keys not properly replaced previously. + String currentSegmentName = currentSegment.getSegmentName(); + if (currentSegmentName.equals(segmentName)) { + numKeysInWrongSegment.getAndIncrement(); + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return currentRecordLocation; + } + } + + // The current record is in a different segment + // Update the record location when getting a newer comparison value, or the value is the same as the + // current value, but the segment has a larger sequence number (the segment is newer than the current + // segment). + if (comparisonResult > 0 || (comparisonResult == 0 && shouldReplaceOnComparisonTie(segmentName, + currentSegmentName, segment.getSegmentMetadata().getIndexCreationTime(), + currentSegment.getSegmentMetadata().getIndexCreationTime()))) { + replaceDocId(segment, validDocIds, queryableDocIds, currentSegment, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } else { + // New primary key + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, 1); + } + }); + } + int numKeys = numKeysInWrongSegment.get(); + if (numKeys > 0) { + _logger.warn("Found {} primary keys in the wrong segment when adding segment: {}", numKeys, segmentName); + _serverMetrics.addMeteredTableValue(_tableNameWithType, ServerMeter.UPSERT_KEYS_IN_WRONG_SEGMENT, numKeys); + } + } + + @Override + protected void addSegmentWithoutUpsert(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator) { + throw new UnsupportedOperationException("Consistent-deletion does not support preloading of segments."); + } + + @Override + protected void doRemoveSegment(IndexSegment segment) { + String segmentName = segment.getSegmentName(); + _logger.info("Removing {} segment: {}, current primary key count: {}", + segment instanceof ImmutableSegment ? "immutable" : "mutable", segmentName, getNumPrimaryKeys()); + long startTimeMs = System.currentTimeMillis(); + + try ( + UpsertUtils.PrimaryKeyReader primaryKeyReader = new UpsertUtils.PrimaryKeyReader(segment, _primaryKeyColumns)) { + removeSegment(segment, + UpsertUtils.getPrimaryKeyIterator(primaryKeyReader, segment.getSegmentMetadata().getTotalDocs())); + } catch (Exception e) { + throw new RuntimeException( + String.format("Caught exception while removing segment: %s, table: %s", segment.getSegmentName(), + _tableNameWithType), e); + } + + // Update metrics + long numPrimaryKeys = getNumPrimaryKeys(); + updatePrimaryKeyGauge(numPrimaryKeys); + _logger.info("Finished removing segment: {} in {}ms, current primary key count: {}", segmentName, + System.currentTimeMillis() - startTimeMs, numPrimaryKeys); + } + + @Override + protected void removeSegment(IndexSegment segment, Iterator<PrimaryKey> primaryKeyIterator) { + Set<Object> deDuplicatedPrimaryKeys = new HashSet<>(); + while (primaryKeyIterator.hasNext()) { + PrimaryKey primaryKey = primaryKeyIterator.next(); + _primaryKeyToRecordLocationMap.computeIfPresent(HashUtils.hashPrimaryKey(primaryKey, _hashFunction), + (pk, recordLocation) -> { + if (deDuplicatedPrimaryKeys.contains(pk)) { + return recordLocation; + } + deDuplicatedPrimaryKeys.add(pk); + if (recordLocation.getSegment() == segment) { + return null; + } Review Comment: (minor) Consider moving this check before unique key check to reduce key set size ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.java: ########## @@ -0,0 +1,391 @@ +/** + * 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.pinot.segment.local.upsert; + +import com.google.common.annotations.VisibleForTesting; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Objects; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicInteger; +import javax.annotation.Nullable; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.pinot.common.metrics.ServerMeter; +import org.apache.pinot.segment.local.indexsegment.immutable.ImmutableSegmentImpl; +import org.apache.pinot.segment.local.segment.readers.LazyRow; +import org.apache.pinot.segment.local.utils.HashUtils; +import org.apache.pinot.segment.spi.ImmutableSegment; +import org.apache.pinot.segment.spi.IndexSegment; +import org.apache.pinot.segment.spi.MutableSegment; +import org.apache.pinot.segment.spi.index.mutable.ThreadSafeMutableRoaringBitmap; +import org.apache.pinot.spi.data.readers.GenericRow; +import org.apache.pinot.spi.data.readers.PrimaryKey; +import org.roaringbitmap.buffer.MutableRoaringBitmap; + + +/** + * Implementation of {@link PartitionUpsertMetadataManager} that is backed by a {@link ConcurrentHashMap} and ensures + * consistent deletions. This should be used when the table is configured with 'enableConsistentDeletes' set to true. + * + * Consistent deletion ensures that when deletedKeysTTL is enabled with UpsertCompaction, the key metadata is + * removed from the HashMap only after all other records in the old segments are compacted. This guarantees + * data consistency. Without this, there can be a scenario where a deleted record is compacted first, while an + * old record remains non-compacted in a previous segment. During a server restart, this could lead to the old + * record reappearing. For the end-user, this would result in a data loss or inconsistency scenario, as the + * record was marked for deletion. + */ +@SuppressWarnings({"rawtypes", "unchecked"}) +@ThreadSafe +public class ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes + extends BasePartitionUpsertMetadataManager { + + @VisibleForTesting + final ConcurrentHashMap<Object, ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation> + _primaryKeyToRecordLocationMap = new ConcurrentHashMap<>(); + // Used to initialize a reference to previous row for merging in partial upsert + private final LazyRow _reusePreviousRow = new LazyRow(); + private final Map<String, Object> _reuseMergeResultHolder = new HashMap<>(); + + public ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes(String tableNameWithType, int partitionId, + UpsertContext context) { + super(tableNameWithType, partitionId, context); + } + + @Override + protected long getNumPrimaryKeys() { + return _primaryKeyToRecordLocationMap.size(); + } + + @Override + protected void doAddOrReplaceSegment(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator, + @Nullable IndexSegment oldSegment, @Nullable MutableRoaringBitmap validDocIdsForOldSegment) { + String segmentName = segment.getSegmentName(); + segment.enableUpsert(this, validDocIds, queryableDocIds); + + AtomicInteger numKeysInWrongSegment = new AtomicInteger(); + while (recordInfoIterator.hasNext()) { + RecordInfo recordInfo = recordInfoIterator.next(); + int newDocId = recordInfo.getDocId(); + Comparable newComparisonValue = recordInfo.getComparisonValue(); + _primaryKeyToRecordLocationMap.compute(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (primaryKey, currentRecordLocation) -> { + if (currentRecordLocation != null) { + // Existing primary key + IndexSegment currentSegment = currentRecordLocation.getSegment(); + int currentDocId = currentRecordLocation.getDocId(); + Comparable currentComparisonValue = currentRecordLocation.getComparisonValue(); + int comparisonResult = newComparisonValue.compareTo(currentComparisonValue); + int currentDistinctSegmentCount = currentRecordLocation.getDistinctSegmentCount(); + + // The current record is in the same segment + // Update the record location when there is a tie to keep the newer record. Note that the record info + // iterator will return records with incremental doc ids. + if (currentSegment == segment) { + if (comparisonResult >= 0) { + replaceDocId(segment, validDocIds, queryableDocIds, currentDocId, newDocId, recordInfo); + return new ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation(segment, + newDocId, newComparisonValue, currentDistinctSegmentCount); + } else { + return currentRecordLocation; + } + } + + // The current record is in an old segment being replaced + // This could happen when committing a consuming segment, or reloading a completed segment. In this + // case, we want to update the record location when there is a tie because the record locations should + // point to the new added segment instead of the old segment being replaced. Also, do not update the valid + // doc ids for the old segment because it has not been replaced yet. We pass in an optional valid doc ids + // snapshot for the old segment, which can be updated and used to track the docs not replaced yet. + if (currentSegment == oldSegment) { + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + if (validDocIdsForOldSegment != null) { + validDocIdsForOldSegment.remove(currentDocId); + } + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } + + // This should not happen because the previously replaced segment should have all keys removed. We still + // handle it here, and also track the number of keys not properly replaced previously. + String currentSegmentName = currentSegment.getSegmentName(); + if (currentSegmentName.equals(segmentName)) { + numKeysInWrongSegment.getAndIncrement(); + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return currentRecordLocation; + } + } + + // The current record is in a different segment + // Update the record location when getting a newer comparison value, or the value is the same as the + // current value, but the segment has a larger sequence number (the segment is newer than the current + // segment). + if (comparisonResult > 0 || (comparisonResult == 0 && shouldReplaceOnComparisonTie(segmentName, + currentSegmentName, segment.getSegmentMetadata().getIndexCreationTime(), + currentSegment.getSegmentMetadata().getIndexCreationTime()))) { + replaceDocId(segment, validDocIds, queryableDocIds, currentSegment, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } else { + // New primary key + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, 1); + } + }); + } + int numKeys = numKeysInWrongSegment.get(); + if (numKeys > 0) { + _logger.warn("Found {} primary keys in the wrong segment when adding segment: {}", numKeys, segmentName); + _serverMetrics.addMeteredTableValue(_tableNameWithType, ServerMeter.UPSERT_KEYS_IN_WRONG_SEGMENT, numKeys); + } + } + + @Override + protected void addSegmentWithoutUpsert(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator) { + throw new UnsupportedOperationException("Consistent-deletion does not support preloading of segments."); + } + + @Override + protected void doRemoveSegment(IndexSegment segment) { + String segmentName = segment.getSegmentName(); + _logger.info("Removing {} segment: {}, current primary key count: {}", + segment instanceof ImmutableSegment ? "immutable" : "mutable", segmentName, getNumPrimaryKeys()); + long startTimeMs = System.currentTimeMillis(); + + try ( + UpsertUtils.PrimaryKeyReader primaryKeyReader = new UpsertUtils.PrimaryKeyReader(segment, _primaryKeyColumns)) { + removeSegment(segment, + UpsertUtils.getPrimaryKeyIterator(primaryKeyReader, segment.getSegmentMetadata().getTotalDocs())); + } catch (Exception e) { + throw new RuntimeException( + String.format("Caught exception while removing segment: %s, table: %s", segment.getSegmentName(), + _tableNameWithType), e); + } + + // Update metrics + long numPrimaryKeys = getNumPrimaryKeys(); + updatePrimaryKeyGauge(numPrimaryKeys); + _logger.info("Finished removing segment: {} in {}ms, current primary key count: {}", segmentName, + System.currentTimeMillis() - startTimeMs, numPrimaryKeys); + } + + @Override + protected void removeSegment(IndexSegment segment, Iterator<PrimaryKey> primaryKeyIterator) { + Set<Object> deDuplicatedPrimaryKeys = new HashSet<>(); + while (primaryKeyIterator.hasNext()) { + PrimaryKey primaryKey = primaryKeyIterator.next(); + _primaryKeyToRecordLocationMap.computeIfPresent(HashUtils.hashPrimaryKey(primaryKey, _hashFunction), + (pk, recordLocation) -> { + if (deDuplicatedPrimaryKeys.contains(pk)) { + return recordLocation; + } + deDuplicatedPrimaryKeys.add(pk); + if (recordLocation.getSegment() == segment) { + return null; + } + return new RecordLocation(recordLocation.getSegment(), recordLocation.getDocId(), + recordLocation.getComparisonValue(), + RecordLocation.decrementSegmentCount(recordLocation.getDistinctSegmentCount())); + }); + } + } + + @Override + public void doRemoveExpiredPrimaryKeys() { + AtomicInteger numDeletedTTLKeysRemoved = new AtomicInteger(); + double largestSeenComparisonValue = _largestSeenComparisonValue.get(); + double deletedKeysThreshold; + if (_deletedKeysTTL > 0) { + deletedKeysThreshold = largestSeenComparisonValue - _deletedKeysTTL; + } else { + deletedKeysThreshold = Double.MIN_VALUE; + } + + _primaryKeyToRecordLocationMap.forEach((primaryKey, recordLocation) -> { + double comparisonValue = ((Number) recordLocation.getComparisonValue()).doubleValue(); + // We need to verify that the record belongs to only one segment. If a record is part of multiple segments, + // an issue can arise where the upsert compaction might first process the segment containing the delete record + // while the previous segment(s) are not compacted. Upon restart, this can inadvertently revive the key + // that was originally marked for deletion. + if (_deletedKeysTTL > 0 && comparisonValue < deletedKeysThreshold + && recordLocation.getDistinctSegmentCount() <= 1) { + ThreadSafeMutableRoaringBitmap currentQueryableDocIds = recordLocation.getSegment().getQueryableDocIds(); + // if key not part of queryable doc id, it means it is deleted + if (currentQueryableDocIds != null && !currentQueryableDocIds.contains(recordLocation.getDocId())) { + _primaryKeyToRecordLocationMap.remove(primaryKey, recordLocation); + removeDocId(recordLocation.getSegment(), recordLocation.getDocId()); + numDeletedTTLKeysRemoved.getAndIncrement(); + } + } + }); + + // Update metrics + updatePrimaryKeyGauge(); + int numDeletedTTLKeys = numDeletedTTLKeysRemoved.get(); + if (numDeletedTTLKeys > 0) { + _logger.info("Deleted {} primary keys based on deletedKeysTTL", numDeletedTTLKeys); + _serverMetrics.addMeteredTableValue(_tableNameWithType, ServerMeter.DELETED_KEYS_TTL_PRIMARY_KEYS_REMOVED, + numDeletedTTLKeys); + } + } + + @Override + protected boolean doAddRecord(MutableSegment segment, RecordInfo recordInfo) { + AtomicBoolean isOutOfOrderRecord = new AtomicBoolean(false); + ThreadSafeMutableRoaringBitmap validDocIds = Objects.requireNonNull(segment.getValidDocIds()); + ThreadSafeMutableRoaringBitmap queryableDocIds = segment.getQueryableDocIds(); + int newDocId = recordInfo.getDocId(); + Comparable newComparisonValue = recordInfo.getComparisonValue(); + + // When TTL is enabled, update largestSeenComparisonValue when adding new record + if (_deletedKeysTTL > 0) { + double comparisonValue = ((Number) newComparisonValue).doubleValue(); + _largestSeenComparisonValue.getAndUpdate(v -> Math.max(v, comparisonValue)); + } + + _primaryKeyToRecordLocationMap.compute(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (primaryKey, currentRecordLocation) -> { + if (currentRecordLocation != null) { + // Existing primary key + IndexSegment currentSegment = currentRecordLocation.getSegment(); + // Update the record location when the new comparison value is greater than or equal to the current value. + // Update the record location when there is a tie to keep the newer record. + if (newComparisonValue.compareTo(currentRecordLocation.getComparisonValue()) >= 0) { + int currentDocId = currentRecordLocation.getDocId(); + if (segment == currentSegment) { + replaceDocId(segment, validDocIds, queryableDocIds, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + currentRecordLocation.getDistinctSegmentCount()); + } else { + replaceDocId(segment, validDocIds, queryableDocIds, currentSegment, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentRecordLocation.getDistinctSegmentCount())); + } + } else { + // Out-of-order record + handleOutOfOrderEvent(currentRecordLocation.getComparisonValue(), recordInfo.getComparisonValue()); + isOutOfOrderRecord.set(true); + if (segment == currentSegment) { + return currentRecordLocation; + } else { + return new RecordLocation(currentSegment, currentRecordLocation.getDocId(), + currentRecordLocation.getComparisonValue(), + _context.isDropOutOfOrderRecord() ? currentRecordLocation.getDistinctSegmentCount() + : RecordLocation.incrementSegmentCount(currentRecordLocation.getDistinctSegmentCount())); + } + } + } else { + // New primary key + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, 1); + } + }); + + updatePrimaryKeyGauge(); + return !isOutOfOrderRecord.get(); + } + + @Override + protected void removeSegment(IndexSegment segment, MutableRoaringBitmap validDocIds) { + } + + @Override + protected GenericRow doUpdateRecord(GenericRow record, RecordInfo recordInfo) { + assert _partialUpsertHandler != null; + _primaryKeyToRecordLocationMap.computeIfPresent(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (pk, recordLocation) -> { + // Read the previous record if the following conditions are met: + // - New record is not a DELETE record + // - New record is not out-of-order + // - Previous record is not deleted + if (!recordInfo.isDeleteRecord() + && recordInfo.getComparisonValue().compareTo(recordLocation.getComparisonValue()) >= 0) { + IndexSegment currentSegment = recordLocation.getSegment(); + ThreadSafeMutableRoaringBitmap currentQueryableDocIds = currentSegment.getQueryableDocIds(); + int currentDocId = recordLocation.getDocId(); + if (currentQueryableDocIds == null || currentQueryableDocIds.contains(currentDocId)) { + _reusePreviousRow.init(currentSegment, currentDocId); + _partialUpsertHandler.merge(_reusePreviousRow, record, _reuseMergeResultHolder); + _reuseMergeResultHolder.clear(); + } + } + return recordLocation; + }); + return record; + } + + @VisibleForTesting + static class RecordLocation { + private final IndexSegment _segment; + private final int _docId; + private final Comparable _comparisonValue; + // The number of distinct segments in which the record is present. If this count is less than or equal to 1, + // we proceed to remove the record from the primary hashmap during the deletedKeysTTL process. + private final int _distinctSegmentCount; + + public RecordLocation(IndexSegment indexSegment, int docId, Comparable comparisonValue, int distinctSegmentCount) { + _segment = indexSegment; + _docId = docId; + _comparisonValue = comparisonValue; + _distinctSegmentCount = distinctSegmentCount; + } + + public static int incrementSegmentCount(int count) { + return count + 1; + } + + public static int decrementSegmentCount(int count) { + return count - 1; + } Review Comment: (minor) I don't think these 2 helper method is necessary. I found them less readable them simply `+1` or `-1` ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.java: ########## @@ -0,0 +1,391 @@ +/** + * 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.pinot.segment.local.upsert; + +import com.google.common.annotations.VisibleForTesting; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Objects; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicInteger; +import javax.annotation.Nullable; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.pinot.common.metrics.ServerMeter; +import org.apache.pinot.segment.local.indexsegment.immutable.ImmutableSegmentImpl; +import org.apache.pinot.segment.local.segment.readers.LazyRow; +import org.apache.pinot.segment.local.utils.HashUtils; +import org.apache.pinot.segment.spi.ImmutableSegment; +import org.apache.pinot.segment.spi.IndexSegment; +import org.apache.pinot.segment.spi.MutableSegment; +import org.apache.pinot.segment.spi.index.mutable.ThreadSafeMutableRoaringBitmap; +import org.apache.pinot.spi.data.readers.GenericRow; +import org.apache.pinot.spi.data.readers.PrimaryKey; +import org.roaringbitmap.buffer.MutableRoaringBitmap; + + +/** + * Implementation of {@link PartitionUpsertMetadataManager} that is backed by a {@link ConcurrentHashMap} and ensures + * consistent deletions. This should be used when the table is configured with 'enableConsistentDeletes' set to true. + * + * Consistent deletion ensures that when deletedKeysTTL is enabled with UpsertCompaction, the key metadata is + * removed from the HashMap only after all other records in the old segments are compacted. This guarantees + * data consistency. Without this, there can be a scenario where a deleted record is compacted first, while an + * old record remains non-compacted in a previous segment. During a server restart, this could lead to the old + * record reappearing. For the end-user, this would result in a data loss or inconsistency scenario, as the + * record was marked for deletion. + */ +@SuppressWarnings({"rawtypes", "unchecked"}) +@ThreadSafe +public class ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes + extends BasePartitionUpsertMetadataManager { + + @VisibleForTesting + final ConcurrentHashMap<Object, ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation> + _primaryKeyToRecordLocationMap = new ConcurrentHashMap<>(); + // Used to initialize a reference to previous row for merging in partial upsert + private final LazyRow _reusePreviousRow = new LazyRow(); + private final Map<String, Object> _reuseMergeResultHolder = new HashMap<>(); + + public ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes(String tableNameWithType, int partitionId, + UpsertContext context) { + super(tableNameWithType, partitionId, context); + } + + @Override + protected long getNumPrimaryKeys() { + return _primaryKeyToRecordLocationMap.size(); + } + + @Override + protected void doAddOrReplaceSegment(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator, + @Nullable IndexSegment oldSegment, @Nullable MutableRoaringBitmap validDocIdsForOldSegment) { + String segmentName = segment.getSegmentName(); + segment.enableUpsert(this, validDocIds, queryableDocIds); + + AtomicInteger numKeysInWrongSegment = new AtomicInteger(); + while (recordInfoIterator.hasNext()) { + RecordInfo recordInfo = recordInfoIterator.next(); + int newDocId = recordInfo.getDocId(); + Comparable newComparisonValue = recordInfo.getComparisonValue(); + _primaryKeyToRecordLocationMap.compute(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (primaryKey, currentRecordLocation) -> { + if (currentRecordLocation != null) { + // Existing primary key + IndexSegment currentSegment = currentRecordLocation.getSegment(); + int currentDocId = currentRecordLocation.getDocId(); + Comparable currentComparisonValue = currentRecordLocation.getComparisonValue(); + int comparisonResult = newComparisonValue.compareTo(currentComparisonValue); + int currentDistinctSegmentCount = currentRecordLocation.getDistinctSegmentCount(); + + // The current record is in the same segment + // Update the record location when there is a tie to keep the newer record. Note that the record info + // iterator will return records with incremental doc ids. + if (currentSegment == segment) { + if (comparisonResult >= 0) { + replaceDocId(segment, validDocIds, queryableDocIds, currentDocId, newDocId, recordInfo); + return new ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation(segment, + newDocId, newComparisonValue, currentDistinctSegmentCount); + } else { + return currentRecordLocation; + } + } + + // The current record is in an old segment being replaced + // This could happen when committing a consuming segment, or reloading a completed segment. In this + // case, we want to update the record location when there is a tie because the record locations should + // point to the new added segment instead of the old segment being replaced. Also, do not update the valid + // doc ids for the old segment because it has not been replaced yet. We pass in an optional valid doc ids + // snapshot for the old segment, which can be updated and used to track the docs not replaced yet. + if (currentSegment == oldSegment) { + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + if (validDocIdsForOldSegment != null) { + validDocIdsForOldSegment.remove(currentDocId); + } + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } + + // This should not happen because the previously replaced segment should have all keys removed. We still + // handle it here, and also track the number of keys not properly replaced previously. + String currentSegmentName = currentSegment.getSegmentName(); + if (currentSegmentName.equals(segmentName)) { + numKeysInWrongSegment.getAndIncrement(); + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return currentRecordLocation; + } + } + + // The current record is in a different segment + // Update the record location when getting a newer comparison value, or the value is the same as the + // current value, but the segment has a larger sequence number (the segment is newer than the current + // segment). + if (comparisonResult > 0 || (comparisonResult == 0 && shouldReplaceOnComparisonTie(segmentName, + currentSegmentName, segment.getSegmentMetadata().getIndexCreationTime(), + currentSegment.getSegmentMetadata().getIndexCreationTime()))) { + replaceDocId(segment, validDocIds, queryableDocIds, currentSegment, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } else { + // New primary key + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, 1); + } + }); + } + int numKeys = numKeysInWrongSegment.get(); + if (numKeys > 0) { + _logger.warn("Found {} primary keys in the wrong segment when adding segment: {}", numKeys, segmentName); + _serverMetrics.addMeteredTableValue(_tableNameWithType, ServerMeter.UPSERT_KEYS_IN_WRONG_SEGMENT, numKeys); + } + } + + @Override + protected void addSegmentWithoutUpsert(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator) { + throw new UnsupportedOperationException("Consistent-deletion does not support preloading of segments."); + } + + @Override + protected void doRemoveSegment(IndexSegment segment) { + String segmentName = segment.getSegmentName(); + _logger.info("Removing {} segment: {}, current primary key count: {}", + segment instanceof ImmutableSegment ? "immutable" : "mutable", segmentName, getNumPrimaryKeys()); + long startTimeMs = System.currentTimeMillis(); + + try ( + UpsertUtils.PrimaryKeyReader primaryKeyReader = new UpsertUtils.PrimaryKeyReader(segment, _primaryKeyColumns)) { + removeSegment(segment, + UpsertUtils.getPrimaryKeyIterator(primaryKeyReader, segment.getSegmentMetadata().getTotalDocs())); + } catch (Exception e) { + throw new RuntimeException( + String.format("Caught exception while removing segment: %s, table: %s", segment.getSegmentName(), + _tableNameWithType), e); + } + + // Update metrics + long numPrimaryKeys = getNumPrimaryKeys(); + updatePrimaryKeyGauge(numPrimaryKeys); + _logger.info("Finished removing segment: {} in {}ms, current primary key count: {}", segmentName, + System.currentTimeMillis() - startTimeMs, numPrimaryKeys); + } + + @Override + protected void removeSegment(IndexSegment segment, Iterator<PrimaryKey> primaryKeyIterator) { + Set<Object> deDuplicatedPrimaryKeys = new HashSet<>(); + while (primaryKeyIterator.hasNext()) { + PrimaryKey primaryKey = primaryKeyIterator.next(); + _primaryKeyToRecordLocationMap.computeIfPresent(HashUtils.hashPrimaryKey(primaryKey, _hashFunction), + (pk, recordLocation) -> { + if (deDuplicatedPrimaryKeys.contains(pk)) { + return recordLocation; + } + deDuplicatedPrimaryKeys.add(pk); Review Comment: (minor) ```suggestion if (!uniquePrimaryKeys.add(pk)) { return recordLocation; } ``` ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/TableUpsertMetadataManagerFactory.java: ########## @@ -83,8 +82,14 @@ public static TableUpsertMetadataManager create(TableConfig tableConfig, metadataManagerClass, tableNameWithType), e); } } else { - LOGGER.info("Creating ConcurrentMapTableUpsertMetadataManager for table: {}", tableNameWithType); - metadataManager = new ConcurrentMapTableUpsertMetadataManager(); + if (upsertConfig.isEnableConsistentDeletes()) { Review Comment: Since the new `ConcurrentMapTableUpsertMetadataManagerForConsistentDeletes` is almost the same as `ConcurrentMapTableUpsertMetadataManager`, I guess we can move the logic into `ConcurrentMapTableUpsertMetadataManager.getOrCreatePartitionManager()` and simply change the value type of `_partitionMetadataManagerMap` to `BasePartitionUpsertMetadataManager` ########## pinot-spi/src/main/java/org/apache/pinot/spi/config/table/UpsertConfig.java: ########## @@ -79,6 +79,9 @@ public enum ConsistencyMode { @JsonPropertyDescription("Whether to preload segments for fast upsert metadata recovery") private boolean _enablePreload; + @JsonPropertyDescription("If we are using deletion + compaction we need to enable this for data consistency") Review Comment: This only associates with `_deletedKeysTTL`, so suggest moving it next to `_deletedKeysTTL` and make the name and description more specific. Currently people might misunderstand this to be associated with `_deleteRecordColumn` ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.java: ########## @@ -0,0 +1,391 @@ +/** + * 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.pinot.segment.local.upsert; + +import com.google.common.annotations.VisibleForTesting; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Objects; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicInteger; +import javax.annotation.Nullable; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.pinot.common.metrics.ServerMeter; +import org.apache.pinot.segment.local.indexsegment.immutable.ImmutableSegmentImpl; +import org.apache.pinot.segment.local.segment.readers.LazyRow; +import org.apache.pinot.segment.local.utils.HashUtils; +import org.apache.pinot.segment.spi.ImmutableSegment; +import org.apache.pinot.segment.spi.IndexSegment; +import org.apache.pinot.segment.spi.MutableSegment; +import org.apache.pinot.segment.spi.index.mutable.ThreadSafeMutableRoaringBitmap; +import org.apache.pinot.spi.data.readers.GenericRow; +import org.apache.pinot.spi.data.readers.PrimaryKey; +import org.roaringbitmap.buffer.MutableRoaringBitmap; + + +/** + * Implementation of {@link PartitionUpsertMetadataManager} that is backed by a {@link ConcurrentHashMap} and ensures + * consistent deletions. This should be used when the table is configured with 'enableConsistentDeletes' set to true. + * + * Consistent deletion ensures that when deletedKeysTTL is enabled with UpsertCompaction, the key metadata is + * removed from the HashMap only after all other records in the old segments are compacted. This guarantees + * data consistency. Without this, there can be a scenario where a deleted record is compacted first, while an + * old record remains non-compacted in a previous segment. During a server restart, this could lead to the old + * record reappearing. For the end-user, this would result in a data loss or inconsistency scenario, as the + * record was marked for deletion. + */ +@SuppressWarnings({"rawtypes", "unchecked"}) +@ThreadSafe +public class ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes + extends BasePartitionUpsertMetadataManager { + + @VisibleForTesting + final ConcurrentHashMap<Object, ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation> + _primaryKeyToRecordLocationMap = new ConcurrentHashMap<>(); + // Used to initialize a reference to previous row for merging in partial upsert + private final LazyRow _reusePreviousRow = new LazyRow(); + private final Map<String, Object> _reuseMergeResultHolder = new HashMap<>(); + + public ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes(String tableNameWithType, int partitionId, + UpsertContext context) { + super(tableNameWithType, partitionId, context); + } + + @Override + protected long getNumPrimaryKeys() { + return _primaryKeyToRecordLocationMap.size(); + } + + @Override + protected void doAddOrReplaceSegment(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator, + @Nullable IndexSegment oldSegment, @Nullable MutableRoaringBitmap validDocIdsForOldSegment) { + String segmentName = segment.getSegmentName(); + segment.enableUpsert(this, validDocIds, queryableDocIds); + + AtomicInteger numKeysInWrongSegment = new AtomicInteger(); + while (recordInfoIterator.hasNext()) { + RecordInfo recordInfo = recordInfoIterator.next(); + int newDocId = recordInfo.getDocId(); + Comparable newComparisonValue = recordInfo.getComparisonValue(); + _primaryKeyToRecordLocationMap.compute(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (primaryKey, currentRecordLocation) -> { + if (currentRecordLocation != null) { + // Existing primary key + IndexSegment currentSegment = currentRecordLocation.getSegment(); + int currentDocId = currentRecordLocation.getDocId(); + Comparable currentComparisonValue = currentRecordLocation.getComparisonValue(); + int comparisonResult = newComparisonValue.compareTo(currentComparisonValue); + int currentDistinctSegmentCount = currentRecordLocation.getDistinctSegmentCount(); + + // The current record is in the same segment + // Update the record location when there is a tie to keep the newer record. Note that the record info + // iterator will return records with incremental doc ids. + if (currentSegment == segment) { + if (comparisonResult >= 0) { + replaceDocId(segment, validDocIds, queryableDocIds, currentDocId, newDocId, recordInfo); + return new ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation(segment, + newDocId, newComparisonValue, currentDistinctSegmentCount); + } else { + return currentRecordLocation; + } + } + + // The current record is in an old segment being replaced + // This could happen when committing a consuming segment, or reloading a completed segment. In this + // case, we want to update the record location when there is a tie because the record locations should + // point to the new added segment instead of the old segment being replaced. Also, do not update the valid + // doc ids for the old segment because it has not been replaced yet. We pass in an optional valid doc ids + // snapshot for the old segment, which can be updated and used to track the docs not replaced yet. + if (currentSegment == oldSegment) { + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + if (validDocIdsForOldSegment != null) { + validDocIdsForOldSegment.remove(currentDocId); + } + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } + + // This should not happen because the previously replaced segment should have all keys removed. We still + // handle it here, and also track the number of keys not properly replaced previously. + String currentSegmentName = currentSegment.getSegmentName(); + if (currentSegmentName.equals(segmentName)) { + numKeysInWrongSegment.getAndIncrement(); + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return currentRecordLocation; + } + } + + // The current record is in a different segment + // Update the record location when getting a newer comparison value, or the value is the same as the + // current value, but the segment has a larger sequence number (the segment is newer than the current + // segment). + if (comparisonResult > 0 || (comparisonResult == 0 && shouldReplaceOnComparisonTie(segmentName, + currentSegmentName, segment.getSegmentMetadata().getIndexCreationTime(), + currentSegment.getSegmentMetadata().getIndexCreationTime()))) { + replaceDocId(segment, validDocIds, queryableDocIds, currentSegment, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } else { + // New primary key + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, 1); + } + }); + } + int numKeys = numKeysInWrongSegment.get(); + if (numKeys > 0) { + _logger.warn("Found {} primary keys in the wrong segment when adding segment: {}", numKeys, segmentName); + _serverMetrics.addMeteredTableValue(_tableNameWithType, ServerMeter.UPSERT_KEYS_IN_WRONG_SEGMENT, numKeys); + } + } + + @Override + protected void addSegmentWithoutUpsert(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator) { + throw new UnsupportedOperationException("Consistent-deletion does not support preloading of segments."); + } + + @Override + protected void doRemoveSegment(IndexSegment segment) { + String segmentName = segment.getSegmentName(); + _logger.info("Removing {} segment: {}, current primary key count: {}", + segment instanceof ImmutableSegment ? "immutable" : "mutable", segmentName, getNumPrimaryKeys()); + long startTimeMs = System.currentTimeMillis(); + + try ( + UpsertUtils.PrimaryKeyReader primaryKeyReader = new UpsertUtils.PrimaryKeyReader(segment, _primaryKeyColumns)) { + removeSegment(segment, + UpsertUtils.getPrimaryKeyIterator(primaryKeyReader, segment.getSegmentMetadata().getTotalDocs())); + } catch (Exception e) { + throw new RuntimeException( + String.format("Caught exception while removing segment: %s, table: %s", segment.getSegmentName(), + _tableNameWithType), e); + } + + // Update metrics + long numPrimaryKeys = getNumPrimaryKeys(); + updatePrimaryKeyGauge(numPrimaryKeys); + _logger.info("Finished removing segment: {} in {}ms, current primary key count: {}", segmentName, + System.currentTimeMillis() - startTimeMs, numPrimaryKeys); + } + + @Override + protected void removeSegment(IndexSegment segment, Iterator<PrimaryKey> primaryKeyIterator) { + Set<Object> deDuplicatedPrimaryKeys = new HashSet<>(); Review Comment: (minor) ```suggestion Set<Object> uniquePrimaryKeys = new HashSet<>(); ``` ########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/upsert/ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.java: ########## @@ -0,0 +1,391 @@ +/** + * 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.pinot.segment.local.upsert; + +import com.google.common.annotations.VisibleForTesting; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Objects; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicInteger; +import javax.annotation.Nullable; +import javax.annotation.concurrent.ThreadSafe; +import org.apache.pinot.common.metrics.ServerMeter; +import org.apache.pinot.segment.local.indexsegment.immutable.ImmutableSegmentImpl; +import org.apache.pinot.segment.local.segment.readers.LazyRow; +import org.apache.pinot.segment.local.utils.HashUtils; +import org.apache.pinot.segment.spi.ImmutableSegment; +import org.apache.pinot.segment.spi.IndexSegment; +import org.apache.pinot.segment.spi.MutableSegment; +import org.apache.pinot.segment.spi.index.mutable.ThreadSafeMutableRoaringBitmap; +import org.apache.pinot.spi.data.readers.GenericRow; +import org.apache.pinot.spi.data.readers.PrimaryKey; +import org.roaringbitmap.buffer.MutableRoaringBitmap; + + +/** + * Implementation of {@link PartitionUpsertMetadataManager} that is backed by a {@link ConcurrentHashMap} and ensures + * consistent deletions. This should be used when the table is configured with 'enableConsistentDeletes' set to true. + * + * Consistent deletion ensures that when deletedKeysTTL is enabled with UpsertCompaction, the key metadata is + * removed from the HashMap only after all other records in the old segments are compacted. This guarantees + * data consistency. Without this, there can be a scenario where a deleted record is compacted first, while an + * old record remains non-compacted in a previous segment. During a server restart, this could lead to the old + * record reappearing. For the end-user, this would result in a data loss or inconsistency scenario, as the + * record was marked for deletion. + */ +@SuppressWarnings({"rawtypes", "unchecked"}) +@ThreadSafe +public class ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes + extends BasePartitionUpsertMetadataManager { + + @VisibleForTesting + final ConcurrentHashMap<Object, ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation> + _primaryKeyToRecordLocationMap = new ConcurrentHashMap<>(); + // Used to initialize a reference to previous row for merging in partial upsert + private final LazyRow _reusePreviousRow = new LazyRow(); + private final Map<String, Object> _reuseMergeResultHolder = new HashMap<>(); + + public ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes(String tableNameWithType, int partitionId, + UpsertContext context) { + super(tableNameWithType, partitionId, context); + } + + @Override + protected long getNumPrimaryKeys() { + return _primaryKeyToRecordLocationMap.size(); + } + + @Override + protected void doAddOrReplaceSegment(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator, + @Nullable IndexSegment oldSegment, @Nullable MutableRoaringBitmap validDocIdsForOldSegment) { + String segmentName = segment.getSegmentName(); + segment.enableUpsert(this, validDocIds, queryableDocIds); + + AtomicInteger numKeysInWrongSegment = new AtomicInteger(); + while (recordInfoIterator.hasNext()) { + RecordInfo recordInfo = recordInfoIterator.next(); + int newDocId = recordInfo.getDocId(); + Comparable newComparisonValue = recordInfo.getComparisonValue(); + _primaryKeyToRecordLocationMap.compute(HashUtils.hashPrimaryKey(recordInfo.getPrimaryKey(), _hashFunction), + (primaryKey, currentRecordLocation) -> { + if (currentRecordLocation != null) { + // Existing primary key + IndexSegment currentSegment = currentRecordLocation.getSegment(); + int currentDocId = currentRecordLocation.getDocId(); + Comparable currentComparisonValue = currentRecordLocation.getComparisonValue(); + int comparisonResult = newComparisonValue.compareTo(currentComparisonValue); + int currentDistinctSegmentCount = currentRecordLocation.getDistinctSegmentCount(); + + // The current record is in the same segment + // Update the record location when there is a tie to keep the newer record. Note that the record info + // iterator will return records with incremental doc ids. + if (currentSegment == segment) { + if (comparisonResult >= 0) { + replaceDocId(segment, validDocIds, queryableDocIds, currentDocId, newDocId, recordInfo); + return new ConcurrentMapPartitionUpsertMetadataManagerForConsistentDeletes.RecordLocation(segment, + newDocId, newComparisonValue, currentDistinctSegmentCount); + } else { + return currentRecordLocation; + } + } + + // The current record is in an old segment being replaced + // This could happen when committing a consuming segment, or reloading a completed segment. In this + // case, we want to update the record location when there is a tie because the record locations should + // point to the new added segment instead of the old segment being replaced. Also, do not update the valid + // doc ids for the old segment because it has not been replaced yet. We pass in an optional valid doc ids + // snapshot for the old segment, which can be updated and used to track the docs not replaced yet. + if (currentSegment == oldSegment) { + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + if (validDocIdsForOldSegment != null) { + validDocIdsForOldSegment.remove(currentDocId); + } + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } + + // This should not happen because the previously replaced segment should have all keys removed. We still + // handle it here, and also track the number of keys not properly replaced previously. + String currentSegmentName = currentSegment.getSegmentName(); + if (currentSegmentName.equals(segmentName)) { + numKeysInWrongSegment.getAndIncrement(); + if (comparisonResult >= 0) { + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return currentRecordLocation; + } + } + + // The current record is in a different segment + // Update the record location when getting a newer comparison value, or the value is the same as the + // current value, but the segment has a larger sequence number (the segment is newer than the current + // segment). + if (comparisonResult > 0 || (comparisonResult == 0 && shouldReplaceOnComparisonTie(segmentName, + currentSegmentName, segment.getSegmentMetadata().getIndexCreationTime(), + currentSegment.getSegmentMetadata().getIndexCreationTime()))) { + replaceDocId(segment, validDocIds, queryableDocIds, currentSegment, currentDocId, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } else { + return new RecordLocation(currentSegment, currentDocId, currentComparisonValue, + RecordLocation.incrementSegmentCount(currentDistinctSegmentCount)); + } + } else { + // New primary key + addDocId(segment, validDocIds, queryableDocIds, newDocId, recordInfo); + return new RecordLocation(segment, newDocId, newComparisonValue, 1); + } + }); + } + int numKeys = numKeysInWrongSegment.get(); + if (numKeys > 0) { + _logger.warn("Found {} primary keys in the wrong segment when adding segment: {}", numKeys, segmentName); + _serverMetrics.addMeteredTableValue(_tableNameWithType, ServerMeter.UPSERT_KEYS_IN_WRONG_SEGMENT, numKeys); + } + } + + @Override + protected void addSegmentWithoutUpsert(ImmutableSegmentImpl segment, ThreadSafeMutableRoaringBitmap validDocIds, + @Nullable ThreadSafeMutableRoaringBitmap queryableDocIds, Iterator<RecordInfo> recordInfoIterator) { + throw new UnsupportedOperationException("Consistent-deletion does not support preloading of segments."); + } + + @Override + protected void doRemoveSegment(IndexSegment segment) { + String segmentName = segment.getSegmentName(); + _logger.info("Removing {} segment: {}, current primary key count: {}", + segment instanceof ImmutableSegment ? "immutable" : "mutable", segmentName, getNumPrimaryKeys()); + long startTimeMs = System.currentTimeMillis(); + + try ( + UpsertUtils.PrimaryKeyReader primaryKeyReader = new UpsertUtils.PrimaryKeyReader(segment, _primaryKeyColumns)) { + removeSegment(segment, + UpsertUtils.getPrimaryKeyIterator(primaryKeyReader, segment.getSegmentMetadata().getTotalDocs())); + } catch (Exception e) { + throw new RuntimeException( + String.format("Caught exception while removing segment: %s, table: %s", segment.getSegmentName(), + _tableNameWithType), e); + } + + // Update metrics + long numPrimaryKeys = getNumPrimaryKeys(); + updatePrimaryKeyGauge(numPrimaryKeys); + _logger.info("Finished removing segment: {} in {}ms, current primary key count: {}", segmentName, + System.currentTimeMillis() - startTimeMs, numPrimaryKeys); + } + + @Override + protected void removeSegment(IndexSegment segment, Iterator<PrimaryKey> primaryKeyIterator) { + Set<Object> deDuplicatedPrimaryKeys = new HashSet<>(); Review Comment: Please also add some comments explaining why we need to dedup it -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org
