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https://issues.apache.org/jira/browse/SOLR-8420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15252869#comment-15252869
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ASF subversion and git services commented on SOLR-8420:
-------------------------------------------------------

Commit f9acafbd917b7970b29f12e0c637612d2cd216f7 in lucene-solr's branch 
refs/heads/branch_5_5 from Tomas Fernandez Lobbe
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=f9acafb ]

SOLR-8420: Fix long overflow in sumOfSquares for Date statistics

Casted operations to double. Changed the test to support a percentage error 
given the FUZZY flag in doubles


> Date statistics: sumOfSquares overflows long
> --------------------------------------------
>
>                 Key: SOLR-8420
>                 URL: https://issues.apache.org/jira/browse/SOLR-8420
>             Project: Solr
>          Issue Type: Bug
>          Components: SearchComponents - other
>    Affects Versions: 5.4
>            Reporter: Tom Hill
>            Assignee: Tomás Fernández Löbbe
>            Priority: Minor
>             Fix For: master, 6.0, 5.5.1
>
>         Attachments: 0001-Fix-overflow-in-date-statistics.patch, 
> 0001-Fix-overflow-in-date-statistics.patch, 
> 0001-Fix-overflow-in-date-statistics.patch, SOLR-8420.patch, StdDev.java
>
>
> The values for Dates are large enough that squaring them overflows a "long" 
> field. This should be converted to a double. 
> StatsValuesFactory.java, line 755 DateStatsValues#updateTypeSpecificStats Add 
> a cast to double 
> sumOfSquares += ( (double)value * value * count);



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