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https://issues.apache.org/jira/browse/SPARK-23391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen reassigned SPARK-23391:
---------------------------------

    Assignee: liuxian

> It may lead to overflow for some integer multiplication 
> --------------------------------------------------------
>
>                 Key: SPARK-23391
>                 URL: https://issues.apache.org/jira/browse/SPARK-23391
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.3.0
>            Reporter: liuxian
>            Assignee: liuxian
>            Priority: Minor
>             Fix For: 2.2.2, 2.3.0
>
>
> In the {{getBlockData}},{{blockId.reduceId}} is the {{Int}} type, when it is 
> greater than 2^28, {{blockId.reduceId*8}} will overflow.
> In the _decompress0, len_ and  _unitSize are  {{Int}}_ type, so _len * 
> unitSize_ may lead to  overflow
>  
>  



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