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https://issues.apache.org/jira/browse/LUCENE-10598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17545356#comment-17545356
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Lu Xugang commented on LUCENE-10598:
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{quote}Maybe we should enhance CheckIndex to also check that the count hasn't
changed after iterating over all values to detect this? {quote}
Hi [~jpountz] Could we add a count used to record ,similar to what
SortedNumericDocValues did?
> SortedSetDocValues#docValueCount() should be always greater than zero
> ---------------------------------------------------------------------
>
> Key: LUCENE-10598
> URL: https://issues.apache.org/jira/browse/LUCENE-10598
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Lu Xugang
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> This test runs failed.
> {code:java}
> public void testDocValueCount() throws IOException {
> try (Directory d = newDirectory()) {
> try (IndexWriter w = new IndexWriter(d, new IndexWriterConfig())) {
> for (int j = 0; j < 1; j++) {
> Document doc = new Document();
> doc.add(new SortedSetDocValuesField("field", new BytesRef("a")));
> doc.add(new SortedSetDocValuesField("field", new BytesRef("a")));
> doc.add(new SortedSetDocValuesField("field", new BytesRef("b")));
> w.addDocument(doc);
> }
> }
> try (IndexReader reader = DirectoryReader.open(d)) {
> assertEquals(1, reader.leaves().size());
> for (LeafReaderContext leaf : reader.leaves()) {
> SortedSetDocValues docValues=
> leaf.reader().getSortedSetDocValues("field") ;
> for (int doc1 = docValues.nextDoc(); doc1 !=
> DocIdSetIterator.NO_MORE_DOCS; doc1 = docValues.nextDoc()) {
> assert docValues.docValueCount() > 0;
> }
> }
> }
> }
> }
> {code}
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