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https://issues.apache.org/jira/browse/HADOOP-11570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14316019#comment-14316019
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Thomas Demoor commented on HADOOP-11570:
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Thanks [~dhecht] for the extra iftop feedback. +1

[[email protected]] is currently the only active committer around here. He 
made this issue a subtask of HADOOP-11571 so i'm sure it's on his list.

> S3AInputStream.close() downloads the remaining bytes of the object from S3
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-11570
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11570
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.6.0
>            Reporter: Dan Hecht
>         Attachments: HADOOP-11570-001.patch
>
>
> Currently, S3AInputStream.close() calls S3Object.close().  But, 
> S3Object.close() will read the remaining bytes of the S3 object, potentially 
> transferring a lot of bytes from S3 that are discarded.  Instead, the wrapped 
> stream should be aborted to avoid transferring discarded bytes (unless the 
> preceding read() finished at contentLength).  For example, reading only the 
> first byte of a 1 GB object and then closing the stream will result in all 1 
> GB transferred from S3.



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