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https://issues.apache.org/jira/browse/PHOENIX-4525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16323070#comment-16323070
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James Taylor commented on PHOENIX-4525:
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Nice find, [~sergey.soldatov]. +1 from me too.
> Integer overflow in GroupBy execution
> -------------------------------------
>
> Key: PHOENIX-4525
> URL: https://issues.apache.org/jira/browse/PHOENIX-4525
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.13.0
> Reporter: Sergey Soldatov
> Assignee: Sergey Soldatov
> Attachments: PHOENIX-4525-2.patch, PHOENIX-4525.patch
>
>
> During the execution of group by we adjust memory for the internal cache to
> keep all unique keys. We're increasing the number of keys by 1.5 factor and
> calculate how much space we need for it using SizedUtil.sizeOfMap, which is
> using ints as parameters and returns long. But since we are using all ints
> during the calculation, the integer overflow may happen and the method would
> return a negative value. As the result the query would fail, reporting that
> unable to allocate cache with negative size.
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