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Posted to issues@spark.apache.org by "Zhenhua Wang (JIRA)" <ji...@apache.org> on 2016/11/23 08:27:58 UTC

[jira] [Updated] (SPARK-18559) Restrict the lower bound of relativeSD in HLL++

     [ https://issues.apache.org/jira/browse/SPARK-18559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhenhua Wang updated SPARK-18559:
---------------------------------
    Summary: Restrict the lower bound of relativeSD in HLL++  (was: Also restrict the lower bound of relativeSD in HLL++)

> Restrict the lower bound of relativeSD in HLL++
> -----------------------------------------------
>
>                 Key: SPARK-18559
>                 URL: https://issues.apache.org/jira/browse/SPARK-18559
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Zhenhua Wang
>
> In HyperLogLogPlusPlus, THRESHOLDS, RAW_ESTIMATE_DATA and BIAS_DATA all have the same length 15, and we probe these arrays by p-4, so we need to guarantee 0 <= p - 4 <= 14. Otherwise it will cause ArrayIndexOutOfBoundsException.



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