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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6097) zero-copy reads are incorrectly disabled on file offsets above 2GB
Date Fri, 14 Mar 2014 13:55:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13935032#comment-13935032
] 

Hudson commented on HDFS-6097:
------------------------------

SUCCESS: Integrated in Hadoop-Hdfs-trunk #1701 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1701/])
HDFS-6097. Zero-copy reads are incorrectly disabled on file offsets above 2GB (cmccabe) (cmccabe:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1577350)
* /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/DFSInputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/ShortCircuitReplica.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/TestEnhancedByteBufferAccess.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/BlockReaderTestUtil.java


> zero-copy reads are incorrectly disabled on file offsets above 2GB
> ------------------------------------------------------------------
>
>                 Key: HDFS-6097
>                 URL: https://issues.apache.org/jira/browse/HDFS-6097
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.4.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>             Fix For: 2.4.0
>
>         Attachments: HDFS-6097.003.patch, HDFS-6097.004.patch, HDFS-6097.005.patch
>
>
> Zero-copy reads are incorrectly disabled on file offsets above 2GB due to some code that
is supposed to disable zero-copy reads on offsets in block files greater than 2GB (because
MappedByteBuffer segments are limited to that size).



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