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https://issues.apache.org/jira/browse/FLINK-9238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16465391#comment-16465391
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liuzhixin commented on FLINK-9238:
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Thanks for your answer，that's a really annoying problem.
> There are some questions about BuckeingSink when sinking data to S3.
> ---------------------------------------------------------------------
>
> Key: FLINK-9238
> URL: https://issues.apache.org/jira/browse/FLINK-9238
> Project: Flink
> Issue Type: Bug
> Components: filesystem-connector
> Affects Versions: 1.4.2
> Reporter: liuzhixin
> Priority: Major
>
> When flink is sinking data to S3, there are some IOExceptions from fs. For
> some reasons I throw the exceptions, then the job will restart.
> Sometimes，fs.rename fails and there are pending part files which are from the
> last job and finished part files, but the count of records is not the
> same，slight difference. The "Exactly once" should not be the results.
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