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https://issues.apache.org/jira/browse/HDFS-7694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14320270#comment-14320270
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Hudson commented on HDFS-7694:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #2054 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2054/])
HDFS-7694. FSDataInputStream should support "unbuffer" (cmccabe) (cmccabe: rev
6b39ad0865cb2a7960dd59d68178f0bf28865ce2)
* hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/hdfs.h
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/hdfs.c
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/PeerCache.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSDataInputStream.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/TestUnbuffer.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CanUnbuffer.java
> 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
> Fix For: 2.7.0
>
> Attachments: HDFS-7694.001.patch, HDFS-7694.002.patch,
> HDFS-7694.003.patch, HDFS-7694.004.patch, HDFS-7694.005.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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