[jira] [Created] (LUCENE-6906) Lucene54DocValuesFormat bug when a large segment does not have values

["Adrien Grand (JIRA)" <ji...@apache.org>]

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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