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https://issues.apache.org/jira/browse/KYLIN-2552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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liyang resolved KYLIN-2552.
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Resolution: Fixed
This is fixed.
> Fix backward compatibility
> ---------------------------
>
> Key: KYLIN-2552
> URL: https://issues.apache.org/jira/browse/KYLIN-2552
> Project: Kylin
> Issue Type: Sub-task
> Reporter: XIE FAN
> Assignee: XIE FAN
> Fix For: v2.0.0
>
>
> In KYLIN-2518, we modify the hash algorithm in the putRowKeyToHLL method in
> FactDistinictColumnsMapper. This optimization may cause backward
> compatibility problems because different kylin version may use different hash
> algorithm and this will cause inaccurate estimation of the number of cuboids.
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