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https://issues.apache.org/jira/browse/HDFS-8902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kai Zheng resolved HDFS-8902.
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    Resolution: Duplicate

> Uses ByteBuffer on heap or direct ByteBuffer according to used erasure coder 
> in striping read (position and stateful)
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-8902
>                 URL: https://issues.apache.org/jira/browse/HDFS-8902
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>
> We would choose ByteBuffer on heap or direct ByteBuffer according to used 
> erasure coder in striping read (position and stateful), for performance 
> consideration. Pure Java implemented coder favors on heap one, though native 
> coder likes more direct one, avoiding data copy.



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