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https://issues.apache.org/jira/browse/HDFS-7790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14319423#comment-14319423
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Hudson commented on HDFS-7790:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #7098 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/7098/])
HDFS-7790. Do not create optional fields in DFSInputStream unless they are
needed (cmccabe) (cmccabe: rev 871cb56152e6039ff56c6fabfcd45451029471c3)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
> Do not create optional fields in DFSInputStream unless they are needed
> ----------------------------------------------------------------------
>
> Key: HDFS-7790
> URL: https://issues.apache.org/jira/browse/HDFS-7790
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: dfsclient
> Affects Versions: 2.3.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Fix For: 2.7.0
>
> Attachments: HDFS-7790.001.patch
>
>
> {{DFSInputStream#oneByteBuffer}} and {{DFSInputStream#extendedReadBuffers}}
> are only used some of the time, and they are always used under the positional
> lock. Let's create them on demand to save memory.
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