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https://issues.apache.org/jira/browse/HDFS-8678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15315113#comment-15315113
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Allen Wittenauer commented on HDFS-8678:
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When I attempt to use this, I only get a link to view the tail of the file.  A 
few thoughts:

* It's good that viewing the file requires another action on the part of the 
user.
* I wonder if it's possible to craft a payload that could take over the browser.
* Why do I only get to see the tail and not the head?  If I'm using something 
like CSV, the head of the file could be extremely important.

> Bring back the feature to view chunks of files in the HDFS file browser
> -----------------------------------------------------------------------
>
>                 Key: HDFS-8678
>                 URL: https://issues.apache.org/jira/browse/HDFS-8678
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ravi Prakash
>            Assignee: Ravi Prakash
>         Attachments: HDFS-8678.01.patch, HDFS-8678.02.patch
>
>
> The legacy file browser displayed small chunks of a file in the browser 
> itself. This was useful to users because they can quickly verify that their 
> input or output is in the format they expect. We should bring back this 
> functionality.



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