Issues

• Specify in documentation of IndexInput that any IOException/EOFException while reading from it will leave the stream in an undetermined state

  type:documentation
  apache/lucene#16951 · Filter by author uschindler opened on Oct 29, 2026 · 11.0.0
  1

• Stopword before AND changes results in 10.6 due to a classic query parser change

  type:bug
  apache/lucene#16950 · Filter by author shbhar opened on Oct 29, 2026

• Tracking issue for the AI-assisted bug list

  apache/lucene#16937 · Filter by author shbhar opened on Oct 28, 2026
  1

• Surround DistanceSubQuery javadoc refers to addSpanNearQueries(); the interface method is addSpanQueries()

  type:documentation
  apache/lucene#16935 · Filter by author hidingmyname opened on Oct 28, 2026

• HighFreqTerms.DocFreqComparator javadoc says it compares by "docTermFreq"; it compares docFreq

  type:documentation
  apache/lucene#16934 · Filter by author hidingmyname opened on Oct 28, 2026

• StemmerUtil.startsWith javadoc says "starts with the suffix"; it tests a prefix

  type:documentation
  apache/lucene#16933 · Filter by author hidingmyname opened on Oct 28, 2026

• Test-framework compressing codecs are documented as "CompressionCodec"; the base class is CompressingCodec

  apache/lucene#16928 · Filter by author hidingmyname opened on Oct 28, 2026

• JFlex skeletons document yyreset() as setting lexical state to ZZ_INITIAL; the constant is YYINITIAL

  apache/lucene#16927 · Filter by author hidingmyname opened on Oct 28, 2026

• UpgradeIndexMergePolicy.shouldUpgradeSegment javadoc shows si.getVersion(); SegmentCommitInfo has no getVersion(), the code uses si.info.getVersion()

  apache/lucene#16922 · Filter by author hidingmyname opened on Oct 27, 2026

• BM25Similarity/TFIDFSimilarity idfExplain javadoc says it returns "an Explain object"; the type is Explanation

  apache/lucene#16921 · Filter by author hidingmyname opened on Oct 27, 2026

• SetKeywordMarkerFilter constructor javadoc says "Create a new KeywordSetMarkerFilter"

  apache/lucene#16920 · Filter by author hidingmyname opened on Oct 27, 2026

• Deprecations slated for removal in 11.0

  type:task
  Task

  apache/lucene#16918 · Filter by author javanna opened on Oct 27, 2026 · 11.0.0

• Typo in IBSimilarity

  type:documentation
  apache/lucene#16909 · Filter by author ant-tok opened on Oct 26, 2026

• PiPNN style level 0 graph construction

  apache/lucene#16906 · Filter by author Tony-X opened on Oct 25, 2026
  5

• HNSW merges with asymmetric quantization read the query-side records at random during diversity checks

  apache/lucene#16903 · Filter by author goankur opened on Oct 24, 2026

• Quantize BYTE vector fields to 1-bit codes, and rescore with the raw int8 vectors

  apache/lucene#16902 · Filter by author goankur opened on Oct 24, 2026

• openIfChanged returns null after flush() when the only changes are doc-values updates

  type:bug
  apache/lucene#16900 · Filter by author shbhar opened on Oct 23, 2026
  4

• TopFieldCollector returns wrong top hits with document blocks when child documents match

  apache/lucene#16887 · Filter by author salvatorecampagna opened on Oct 21, 2026
  2

• Removal of unused class CachingExpressionValueSource?

  apache/lucene#16880 · Filter by author spinscale opened on Oct 21, 2026

• PerFieldMergeState.FilterFieldsProducer#terms(String) has O(n²) complexity

  type:bug
  apache/lucene#16874 · Filter by author torstenkuhnhenne opened on Oct 20, 2026

• SegmentCommitInfo.sizeInBytes() can return its -1 cache sentinel during concurrent invalidation

  type:bug
  apache/lucene#16861 · Filter by author nicktindall opened on Oct 19, 2026
  2

• Avoid the separate checkIntegrity read of .vec when merging vectors

  type:enhancement
  apache/lucene#16850 · Filter by author dengfengjiang77 opened on Oct 16, 2026

• Allow merged-segment warming to run asynchronously off the merge thread

  type:enhancement
  apache/lucene#16845 · Filter by author tlrx opened on Oct 15, 2026

• BufferedUpdates comment refers to DocumentWriterPerThread

  type:documentation
  apache/lucene#16828 · Filter by author hidingmyname opened on Oct 12, 2026
  1

• ArrayIntroSorter constructor javadoc says ArrayInPlaceMergeSorter

  type:documentation
  apache/lucene#16827 · Filter by author hidingmyname opened on Oct 12, 2026
  1