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https://issues.apache.org/jira/browse/HDFS-7790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe updated HDFS-7790:
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Attachment: HDFS-7790.001.patch
> 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
> 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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