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https://issues.apache.org/jira/browse/HDFS-7678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14291701#comment-14291701
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Li Bo commented on HDFS-7678:
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This code has not synced with Codec and Namenode code, so I use
BlockGroupHelper and CodecHelper when I want to call some functions about codec
and BlockGroup. Still a lot of work to do, such as add
BlockGroupContiguousReader which read a block group in contiguous layout, and
unit tests .
> Block group reader with decode functionality
> --------------------------------------------
>
> Key: HDFS-7678
> URL: https://issues.apache.org/jira/browse/HDFS-7678
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Li Bo
> Assignee: Li Bo
> Attachments: BlockGroupReader.patch
>
>
> A block group reader will read data from BlockGroup no matter in striping
> layout or contiguous layout. The corrupt blocks can be known before
> reading(told by namenode), or just be found during reading. The block group
> reader needs to do decoding work when some blocks are found corrupt.
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