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https://issues.apache.org/jira/browse/HDFS-8804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14640768#comment-14640768
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Jing Zhao commented on HDFS-8804:
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Both {{duplicate}} and {{slice}} only play with the limit/position and the
content of the buffer is shared. So calling {{duplicate}} makes sure we do not
need to change the limit/position of the original buffer directly.
> Erasure Coding: use DirectBufferPool in DFSStripedInputStream for buffer
> allocation
> -----------------------------------------------------------------------------------
>
> Key: HDFS-8804
> URL: https://issues.apache.org/jira/browse/HDFS-8804
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Attachments: HDFS-8804.000.patch
>
>
> Currently we directly allocate direct ByteBuffer in DFSStripedInputstream for
> the stripe buffer and the buffers holding parity data. It's better to get
> ByteBuffer from DirectBufferPool.
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