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https://issues.apache.org/jira/browse/SOLR-18556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rahul Goswami reassigned SOLR-18556:
------------------------------------
Assignee: Rahul Goswami
> Indexing with 'cuvs' module breaks due to incompatibility with Lucene 10.4
> --------------------------------------------------------------------------
>
> Key: SOLR-18556
> URL: https://issues.apache.org/jira/browse/SOLR-18556
> Project: Solr
> Issue Type: Bug
> Affects Versions: 10.1
> Reporter: Rahul Goswami
> Assignee: Rahul Goswami
> Priority: Major
>
> GPU accelerated indexing using "cuvs" module breaks on Solr 10.1. This is due
> to certain incompatibilities in the cuvs-lucene library with Lucene 10.4
> which backs Solr 10.1.
> As of this JIRA creation, the maintainers of cuvs-lucene are aware of the
> breakage, and the fix supporting several Lucene versions till Lucene 10.5
> (and potentially Lucene 10.6 (unreleased as of this ticket creation)) is
> expected to be available in Dec 2026 with the release of cuvs-lucene v26.12.
> Additionally, to minimize the possibility of similar breakages in the future,
> the maintainers have also shared that they plan to have cuvs-lucene releases
> every 2 months to keep up with the latest released Lucene versions starting
> with v26.12.
>
> 2026-10-10 20:57:58.804 WARN (qtp166454155-71) [] o.e.j.e.s.ServletChannel
> /solr/vectors/update
> java.lang.NoSuchMethodError: 'int[]
> org.apache.lucene.util.hnsw.HnswGraph$NodesIterator.getSortedNodes(org.apache.lucene.util.hnsw.HnswGraph$NodesIterator)'
> at
> com.nvidia.cuvs.lucene.Lucene99AcceleratedHNSWVectorsWriter.writeGraph(Lucene99AcceleratedHNSWVectorsWriter.java:444)
> at
> com.nvidia.cuvs.lucene.Lucene99AcceleratedHNSWVectorsWriter.writeFieldInternal(Lucene99AcceleratedHNSWVectorsWriter.java:230)
> at
> com.nvidia.cuvs.lucene.Lucene99AcceleratedHNSWVectorsWriter.writeField(Lucene99AcceleratedHNSWVectorsWriter.java:502)
> at
> com.nvidia.cuvs.lucene.Lucene99AcceleratedHNSWVectorsWriter.flush(Lucene99AcceleratedHNSWVectorsWriter.java:494)
> at
> org.apache.lucene.codecs.perfield.PerFieldKnnVectorsFormat$FieldsWriter.flush(PerFieldKnnVectorsFormat.java:120)
> at
> org.apache.lucene.index.VectorValuesConsumer.flush(VectorValuesConsumer.java:76)
> at org.apache.lucene.index.IndexingChain.flush(IndexingChain.java:305)
> at
> org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:456)
> at org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
> at
> org.apache.lucene.index.DocumentsWriter.maybeFlush(DocumentsWriter.java:456)
> at
> org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:649)
> at
> org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:3712)
> at org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:4160)
> at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:4122)
> at
> org.apache.solr.update.DirectUpdateHandler2.commit(DirectUpdateHandler2.java:872)
> at
> org.apache.solr.update.processor.RunUpdateProcessorFactory$RunUpdateProcessor.processCommit(RunUpdateProcessorFactory.java:100)
> at
> org.apache.solr.update.processor.UpdateRequestProcessor.processCommit(UpdateRequestProcessor.java:66)
> at
> org.apache.solr.update.processor.DistributedUpdateProcessor.doLocalCommit(DistributedUpdateProcessor
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