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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7790) Do not create optional fields in DFSInputStream unless they are needed
Date Thu, 12 Feb 2015 19:12:14 GMT
Colin Patrick McCabe created HDFS-7790:
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             Summary: 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


{{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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