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https://issues.apache.org/jira/browse/HADOOP-18706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17714577#comment-17714577
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ASF GitHub Bot commented on HADOOP-18706:
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steveloughran commented on PR #5563:
URL: https://github.com/apache/hadoop/pull/5563#issuecomment-1516264118
ok, and they all work? good to know. Don't be afraid to mention any which do
fail, as they are often from different developer config, and its good to find
out what is wrong with an existing test (or worse, production code) before we
ship...
> 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
>
> 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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