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https://issues.apache.org/jira/browse/SQOOP-788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13535438#comment-13535438
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Hari Shreedharan commented on SQOOP-788:
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The issue would affect export as well, since objects are reused there too.
> Sqoop2: Import sometimes duplicate some data
> --------------------------------------------
>
> Key: SQOOP-788
> URL: https://issues.apache.org/jira/browse/SQOOP-788
> Project: Sqoop
> Issue Type: Bug
> Reporter: Jarek Jarcec Cecho
> Priority: Blocker
> Fix For: 1.99.1
>
>
> I've noticed that on my unique testing set of 408957 rows, import always
> imports 408957 rows. However when I check number of unique lines I usually
> got smaller number - for example 408056 (less by 901).
> Because total number of rows fits, I'm expecting that we sometimes read one
> value twice somehow. I'm not quite sure why.
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