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https://issues.apache.org/jira/browse/HDFS-6071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13925415#comment-13925415
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Hudson commented on HDFS-6071:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #5294 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/5294/])
HDFS-6071. BlockReaderLocal does not return -1 on EOF when doing a zero-length 
read on a short file. (cmccabe) (cmccabe: 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1575797)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/BlockReaderLocal.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestRead.java


> BlockReaderLocal doesn't return -1 on EOF when doing a zero-length read on a 
> short file
> ---------------------------------------------------------------------------------------
>
>                 Key: HDFS-6071
>                 URL: https://issues.apache.org/jira/browse/HDFS-6071
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.4.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>             Fix For: 2.4.0
>
>         Attachments: HDFS-6071.001.patch, HDFS-6071.002.patch
>
>
> BlockReaderLocal doesn't return -1 on EOF when doing a zero-length read on a 
> short file.  Specifically, if the file is shorter than the readahead buffer, 
> or if the position is nearer to the end than the length of the readahead 
> buffer, this may happen.  This is mainly a concern because libhdfs relies on 
> this to determine whether it should use direct reads.



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