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https://issues.apache.org/jira/browse/HADOOP-18706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-18706.
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Fix Version/s: 3.4.0
Resolution: Fixed
> The temporary files for disk-block buffer aren't unique enough to recover
> partial uploads.
> -------------------------------------------------------------------------------------------
>
> Key: HADOOP-18706
> URL: https://issues.apache.org/jira/browse/HADOOP-18706
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/s3
> Reporter: Chris Bevard
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.4.0
>
>
> If an application crashes during an S3ABlockOutputStream upload, it's
> possible to complete the upload if fast.upload.buffer is set to disk by
> uploading the s3ablock file with putObject as the final part of the multipart
> upload. If the application has multiple uploads running in parallel though
> and they're on the same part number when the application fails, then there is
> no way to determine which file belongs to which object, and recovery of
> either upload is impossible.
> If the temporary file name for disk buffering included the s3 key, then every
> partial upload would be recoverable.
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