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Cluster Based ANN Vector Search for Lucene

Status: Open.

#15612 In apache/lucene;

· vigyasharma opened on Jan 26, 2026

Use bulk scoring more places for HNSW graphs

type:enhancement

vector-based-search

Status: Open.

#15606 In apache/lucene;

· benwtrent opened on Jan 23, 2026

TopFieldCollectorManager is not thread-safe despite claiming "thread-safe internal states"

type:documentation

Status: Open.

#15605 In apache/lucene;

· gun-pi opened on Jan 23, 2026

Failure in TestExitableDirectoryReader.testDocValues

type:test

Status: Open.

#15596 In apache/lucene;

· spinscale opened on Jan 21, 2026

Failure in TestAddIndexes.testAddIndexesWithConcurrentMerges

type:test

Status: Open.

#15580 In apache/lucene;

· romseygeek opened on Jan 16, 2026

Should we support preloading slices of MemorySegmentIndexInput?

type:enhancement

Status: Open.

#15579 In apache/lucene;

· kaivalnp opened on Jan 15, 2026

Should we increase <code>BufferedChecksum</code>'s buffer from 1 KB -&gt; 2 KB?

type:enhancement

Status: Open.

#15572 In apache/lucene;

· mikemccand opened on Jan 14, 2026

Share prefetch hit counter across slices/clones

type:bug

Status: Open.

#15571 In apache/lucene;

· shubhamsrkdev opened on Jan 14, 2026

Unable to Tessellate shape for valid Polygon

type:bug

Status: Open.

#15554 In apache/lucene;

· roblburris opened on Jan 7, 2026

Provide helper utility API to compute CRC32 across concurrent (map/reduce) chunks

type:enhancement

Status: Open.

#15552 In apache/lucene;

· mikemccand opened on Jan 7, 2026

ToParentBlockJoinSortField does not handle missing values correctly

type:bug

Status: Open.

#15548 In apache/lucene;

· romseygeek opened on Jan 5, 2026

Clarifying TF-IDF / ClassicSimilarity scoring changes across Lucene versions (impact seen during Solr 5 → 8 upgrade)

Status: Open.

#15547 In apache/lucene;

· parveensaini opened on Jan 5, 2026