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https://issues.apache.org/jira/browse/HDFS-9603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15082210#comment-15082210
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Rui Li commented on HDFS-9603:
------------------------------

Thanks Kai for the review.
I used the concrete class because we already have methods like 
{{CodecUtil::createRSRawEncoder}}. But I agree we can wait until HitchHicker 
coder gets in. Then we can figure out how to create different coders according 
to configurations.
The star import wasn't introduced in this patch. I can fix it anyway.

> Erasure Coding: Use ErasureCoder to encode/decode a block group
> ---------------------------------------------------------------
>
>                 Key: HDFS-9603
>                 URL: https://issues.apache.org/jira/browse/HDFS-9603
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Rui Li
>            Assignee: Rui Li
>         Attachments: HDFS-9603.1.patch
>
>
> According to design, {{ErasureCoder}} is responsible to encode/decode a block 
> group. Currently however, we directly use {{RawErasureCoder}} to do the work, 
> e.g. in {{DFSStripedOutputStream}}. This task attempts to encapsulate 
> {{RawErasureCoder}} to comply with the design.



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