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https://issues.apache.org/jira/browse/HIVE-15951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15879410#comment-15879410
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Ashutosh Chauhan commented on HIVE-15951:
-----------------------------------------

I checked commons-io is not packaged with hive-exec so it wont be available on 
task nodes. All callers of FileUtils in hive-common are in front end, so it 
wont be an issue for it. But if we add it here, we will need commons-io jar on 
task nodes.

> Make sure base persist directory is unique and deleted
> ------------------------------------------------------
>
>                 Key: HIVE-15951
>                 URL: https://issues.apache.org/jira/browse/HIVE-15951
>             Project: Hive
>          Issue Type: Bug
>          Components: Druid integration
>    Affects Versions: 2.2.0
>            Reporter: slim bouguerra
>            Assignee: slim bouguerra
>            Priority: Critical
>             Fix For: 2.2.0
>
>         Attachments: HIVE-15951.2.patch, HIVE-15951.patch
>
>
> In some cases the base persist directory will contain old data or shared 
> between reducer in the same physical VM.
> That will lead to the failure of the job till that the directory is cleaned.



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