NullPointerException in Lucene Merge (v7.4) [LUCENE-10601]

[asfimport]

Exception in thread "Lucene Merge Thread #1" org.apache.lucene.index.MergePolicy$MergeException: java.lang.NullPointerException
at org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:704)
at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:684)
Caused by: java.lang.NullPointerException
  at org.apache.lucene.index.SortingTermVectorsConsumer.abort(SortingTermVectorsConsumer.java:86)
  at org.apache.lucene.index.TermsHash.abort(TermsHash.java:67)
  at org.apache.lucene.index.DefaultIndexingChain$$Lambda$58/2086447408.close(Unknown Source)
  at org.apache.lucene.index.DefaultIndexingChain.abort(DefaultIndexingChain.java:321)
  at org.apache.lucene.index.DocumentsWriterPerThread.abort(DocumentsWriterPerThread.java:138)
  at org.apache.lucene.index.DocumentsWriter.abortThreadState(DocumentsWriter.java:330)
  at org.apache.lucene.index.DocumentsWriter.abort(DocumentsWriter.java:232)
  at org.apache.lucene.index.IndexWriter.rollbackInternalNoCommit(IndexWriter.java:2298)
  at org.apache.lucene.index.IndexWriter.rollbackInternal(IndexWriter.java:2274)
  at org.apache.lucene.index.IndexWriter.maybeCloseOnTragicEvent(IndexWriter.java:4860)
  at org.apache.lucene.index.IndexWriter.tragicEvent(IndexWriter.java:4850)
  at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:4087)
  at org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:625)
  at org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:662)

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Migrated from LUCENE-10601 by Anantha Krishnan Mahalingam, updated Jun 07 2022

[asfimport]

Adrien Grand (@jpountz) (migrated from JIRA)

This is an old version, but this bit of code hasn't changed for a long time. At first sight I have a hard time seeing how we could run into a NPE there, do you have a unit test that reproduces the issue? What JVM are you running?