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https://issues.apache.org/jira/browse/HDFS-7694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14315334#comment-14315334
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Yi Liu commented on HDFS-7694:
------------------------------

The latest patch looks good to me, thanks Colin. One comment: 
could we verify that we still read successfully and verify the read content is 
correct after we do {{unbuffer}}?


> FSDataInputStream should support "unbuffer"
> -------------------------------------------
>
>                 Key: HDFS-7694
>                 URL: https://issues.apache.org/jira/browse/HDFS-7694
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.7.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-7694.001.patch, HDFS-7694.002.patch, 
> HDFS-7694.003.patch, HDFS-7694.004.patch
>
>
> For applications that have many open HDFS (or other Hadoop filesystem) files, 
> it would be useful to have an API to clear readahead buffers and sockets.  
> This could be added to the existing APIs as an optional interface, in much 
> the same way as we added setReadahead / setDropBehind / etc.



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