Adrien Grand created LUCENE-6906:
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Summary: Lucene54DocValuesFormat bug when a large segment does not
have values
Key: LUCENE-6906
URL: https://issues.apache.org/jira/browse/LUCENE-6906
Project: Lucene - Core
Issue Type: Bug
Reporter: Adrien Grand
Assignee: Adrien Grand
Priority: Minor
Mike reported getting the following stack trace during a merge:
{noformat}
java.lang.ArrayIndexOutOfBoundsException: -1
at
org.apache.lucene.util.packed.DirectMonotonicWriter.flush(DirectMonotonicWriter.java:64)
at
org.apache.lucene.util.packed.DirectMonotonicWriter.finish(DirectMonotonicWriter.java:126)
at
org.apache.lucene.codecs.lucene54.Lucene54DocValuesConsumer.writeSparseMissingBitset(Lucene54DocValuesConsumer.java:399)
at
org.apache.lucene.codecs.lucene54.Lucene54DocValuesConsumer.addNumericField(Lucene54DocValuesConsumer.java:207)
at
org.apache.lucene.codecs.lucene54.Lucene54DocValuesConsumer.addSortedField(Lucene54DocValuesConsumer.java:614)
at
org.apache.lucene.codecs.lucene54.Lucene54DocValuesConsumer.addSortedSetField(Lucene54DocValuesConsumer.java:653)
at
org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat$FieldsWriter.addSortedSetField(PerFieldDocValuesFormat.java:131)
at
org.apache.lucene.codecs.DocValuesConsumer.mergeSortedSetField(DocValuesConsumer.java:736)
at
org.apache.lucene.codecs.DocValuesConsumer.merge(DocValuesConsumer.java:219)
at
org.apache.lucene.index.SegmentMerger.mergeDocValues(SegmentMerger.java:150)
at org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:105)
at
org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:4075)
at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3655)
at
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:588)
at
org.elasticsearch.index.engine.ElasticsearchConcurrentMergeScheduler.doMerge(ElasticsearchConcurrentMergeScheduler.java:95)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:626)
{noformat}
This is due to the fact that the segment did not have any values and made
DirectMonotonicWriter fail since it assumes at least one value (without
explicitly testing it).
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