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https://issues.apache.org/jira/browse/SPARK-44970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17850475#comment-17850475
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Steve Loughran commented on SPARK-44970:
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correct. file is only saved on close(). The incomplete multipart uploads are
still there and you do get billed for them -which is why its critical to have a
lifecycle rule to clean this stuff up. In theory you may be able to rebuild it
on a failure, in practise you'd have a hard time working out the order and
you'll still be short the last 32-64 MB of data
> Spark History File Uploads Can Fail on S3
> -----------------------------------------
>
> Key: SPARK-44970
> URL: https://issues.apache.org/jira/browse/SPARK-44970
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 4.0.0
> Reporter: Holden Karau
> Assignee: Holden Karau
> Priority: Major
>
> Sometimes if the driver OOMs the history log will not upload finish.
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