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https://issues.apache.org/jira/browse/HIVE-17549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16171577#comment-16171577
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Saijin Huang commented on HIVE-17549:
-------------------------------------

Thanks for reply![~lirui].As we konw,MD5 is weaker than sha-256.it is necessary 
to replace md5 hash by sha-256.Also,RowContainer is used for SkewJoin.So in 
rowcontainer.java,the function "copyToDFSDirecory"  is defined to copy tmpfile 
to hdfs path.However,the temp path  generated by sha-256 is more security than 
md5 which help to hold the tmppath unique and security

> Use SHA-256 for RowContainer to improve security
> ------------------------------------------------
>
>                 Key: HIVE-17549
>                 URL: https://issues.apache.org/jira/browse/HIVE-17549
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Saijin Huang
>            Assignee: Saijin Huang
>         Attachments: HIVE-17549.1.patch
>
>
> Use SHA-256 to replace md5 for RowContainer to improve security



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