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https://issues.apache.org/jira/browse/LUCENE-5790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14054389#comment-14054389
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ASF subversion and git services commented on LUCENE-5790:
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Commit 1608640 from [email protected] in branch 'dev/branches/branch_4x'
[ https://svn.apache.org/r1608640 ]
LUCENE-5790: Fix compareTo in MutableValueDouble and MutableValueBool, this
caused incorrect results when grouping on fields with missing values (merge
r1608639)
> MutableValue compareTo impls seem to be broken for exists==false
> ----------------------------------------------------------------
>
> Key: LUCENE-5790
> URL: https://issues.apache.org/jira/browse/LUCENE-5790
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Hoss Man
> Fix For: 5.0, 4.10
>
> Attachments: LUCENE-5790.patch, LUCENE-5790.patch, LUCENE-5790.patch,
> LUCENE-5790.patch
>
>
> On the solr-user mailing list, Ebisawa & Alex both commented that they've
> noticed bugs in the grouping code when some documents don't have values in
> the grouping field.
> In Ebisawa's case, he tracked this down to what appears to be some bugs in
> the logic of the "compareSameType" method of some of the MutableValue
> implementations.
> Thread:
> https://mail-archives.apache.org/mod_mbox/lucene-solr-user/201406.mbox/%3c84f86fce4b8f42268048aecfb2806...@sixpr04mb045.apcprd04.prod.outlook.com%3E
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