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https://issues.apache.org/jira/browse/HDFS-860?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277262#comment-13277262
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Eli Collins commented on HDFS-860:
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We have HdfsDataInputstream#getVisibleLength, it's not plumbed through to 
libhdfs.
                
> fuse-dfs truncate behavior causes issues with scp
> -------------------------------------------------
>
>                 Key: HDFS-860
>                 URL: https://issues.apache.org/jira/browse/HDFS-860
>             Project: Hadoop HDFS
>          Issue Type: Wish
>          Components: contrib/fuse-dfs
>            Reporter: Brian Bockelman
>            Assignee: Brian Bockelman
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HDFS-860.patch, hdfs-860.txt
>
>
> For whatever reason, scp issues a "truncate" once it's written a file to 
> truncate the file to the # of bytes it has written (i.e., if a file is X 
> bytes, it calls truncate(X)).
> This fails on the current fuse-dfs.

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