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https://issues.apache.org/jira/browse/HDFS-843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12793450#action_12793450
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Allen Wittenauer commented on HDFS-843:
---------------------------------------

I can think of one fairly easily:  loading data to a grid without requiring 
having the hadoop client installed.

> Add HTTP POST/PUT/DELETE support for web servers in datanodes
> -------------------------------------------------------------
>
>                 Key: HDFS-843
>                 URL: https://issues.apache.org/jira/browse/HDFS-843
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: name-node
>            Reporter: issei yoshida
>         Attachments: 843.patch
>
>
> Currently, HDFS files can be read from datanodes by their web servers, but 
> cannot be written or deleted. This add HTTP POST/PUT/DELETE support for HDFS. 
> In requests, HTTP Header must contain Content-Length and Content-Type should 
> NOT be "application/x-​www-form-urlencoded". In POST or PUT requests, target 
> data need to be directly stored in HTTP body.

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