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Avoid allocating liveDocs for no soft-deletes (#13895) (#13903) 

Backport of #13895 to 10x

This is a continuation of #13588, where we avoided allocating liveDocs 
for segments that have the __soft_deletes field but no values in it.
However, that PR only addressed the reading side. This change fixes the
writing scenario with IndexWriter.

Relates #13588
This commit is contained in:
Nhat Nguyen 2024-10-14 07:39:31 -07:00 committed by GitHub
parent 97bfd8b673
commit 518c76b51a
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2 changed files with 11 additions and 6 deletions
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11
lucene/core/src/java/org/apache/lucene/index/PendingSoftDeletes.java
View File

@ -76,15 +76,14 @@ final class PendingSoftDeletes extends PendingDeletes {
hardDeletes.onNewReader(reader, info);
// only re-calculate this if we haven't seen this generation
if (dvGeneration < info.getDocValuesGen()) {
final DocIdSetIterator iterator =
FieldExistsQuery.getDocValuesDocIdSetIterator(field, reader);
int newDelCount;
if (iterator
!= null) { // nothing is deleted we don't have a soft deletes field in this segment
assert info.info.maxDoc() > 0 : "maxDoc is 0";
final int newDelCount;
var iterator = FieldExistsQuery.getDocValuesDocIdSetIterator(field, reader);
if (iterator != null && iterator.nextDoc() != DocIdSetIterator.NO_MORE_DOCS) {
iterator = FieldExistsQuery.getDocValuesDocIdSetIterator(field, reader);
newDelCount = applySoftDeletes(iterator, getMutableBits());
assert newDelCount >= 0 : " illegal pending delete count: " + newDelCount;
} else {
// nothing is deleted we don't have a soft deletes field in this segment
newDelCount = 0;
}
assert info.getSoftDelCount() == newDelCount

6
lucene/core/src/test/org/apache/lucene/index/TestSoftDeletesDirectoryReaderWrapper.java
View File

@ -306,6 +306,12 @@ public class TestSoftDeletesDirectoryReaderWrapper extends LuceneTestCase {
softDeletesField, MatchNoDocsQuery::new, mergePolicy));
writer.forceMerge(1);
try (DirectoryReader reader = DirectoryReader.open(writer)) {
for (LeafReaderContext leafContext : reader.leaves()) {
assertThat(leafContext.reader(), instanceOf(SegmentReader.class));
SegmentReader segmentReader = (SegmentReader) leafContext.reader();
assertNull(segmentReader.getLiveDocs());
assertNull(segmentReader.getHardLiveDocs());
}
SoftDeletesDirectoryReaderWrapper wrapped =
new SoftDeletesDirectoryReaderWrapper(reader, softDeletesField);
assertEquals(numDocs, wrapped.numDocs());