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https://issues.apache.org/jira/browse/LUCENE-6529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14584248#comment-14584248
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ASF subversion and git services commented on LUCENE-6529:
---------------------------------------------------------
Commit 1685194 from hoss...@apache.org in branch 'dev/branches/branch_5x'
[ https://svn.apache.org/r1685194 ]
LUCENE-6529: Removed an optimization in UninvertingReader that was causing
incorrect results for Numeric fields using precisionStep (merge r1684704)
> NumericFields + SlowCompositeReaderWrapper + UninvertedReader +
> -Dtests.codec=random can results in incorrect SortedSetDocValues
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-6529
> URL: https://issues.apache.org/jira/browse/LUCENE-6529
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Hoss Man
> Assignee: Hoss Man
> Fix For: 5.3
>
> Attachments: LUCENE-6529.patch, LUCENE-6529.patch, LUCENE-6529.patch,
> LUCENE-6529.patch, LUCENE-6529.patch
>
>
> 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)
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