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  1. Lucene - Core
  2. LUCENE-6529

NumericFields + SlowCompositeReaderWrapper + UninvertedReader + -Dtests.codec=random can results in incorrect SortedSetDocValues


    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 5.3, 6.0
    • None
    • None
    • New


      Digging into SOLR-7631 and SOLR-7605 I became fairly confident that the only explanation of the behavior i was seeing was some sort of bug in either the randomized codec/postings-format or the UninvertedReader, that was only evident when two were combined and used on a multivalued Numeric Field using precision steps. But since i couldn't find any -Dtests.codec or -Dtests.postings.format options that would cause the bug 100% regardless of seed, I switched tactices and focused on reproducing the problem using UninvertedReader directly and checking the SortedSetDocValues.getValueCount().

      I now have a test that fails frequently (and consistently for any seed i find), but only with -Dtests.codec=random – override it with -Dtests.codec=default and everything works fine (based on the exhaustive testing I did in the linked issues, i suspect every named codec works fine - but i didn't re-do that testing here)

      The failures only seem to happen when checking the SortedSetDocValues.getValueCount() of a SlowCompositeReaderWrapper around the UninvertedReader – which suggests the root bug may actually be in SlowCompositeReaderWrapper? (but still has some dependency on the random codec)


        1. LUCENE-6529.patch
          3 kB
          Chris M. Hostetter
        2. LUCENE-6529.patch
          16 kB
          Chris M. Hostetter
        3. LUCENE-6529.patch
          20 kB
          Chris M. Hostetter
        4. LUCENE-6529.patch
          23 kB
          Chris M. Hostetter
        5. LUCENE-6529.patch
          24 kB
          Chris M. Hostetter

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              hossman Chris M. Hostetter
              hossman Chris M. Hostetter
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