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https://issues.apache.org/jira/browse/HDFS-8203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14537472#comment-14537472
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Yi Liu commented on HDFS-8203:
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Jing, I just found we should also override {{seekToNewSource}}, ideally, for
striped block, an internal block is only on one datanode, so
DFSStripedInputStream#seekToNewSource should return false, I opened HDFS-8363
which also removes a hardcode for {{groupSize}}.
> Erasure Coding: Seek and other Ops in DFSStripedInputStream.
> ------------------------------------------------------------
>
> Key: HDFS-8203
> URL: https://issues.apache.org/jira/browse/HDFS-8203
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Yi Liu
> Assignee: Yi Liu
> Fix For: HDFS-7285
>
> Attachments: HDFS-8203.001.patch, HDFS-8203.002.patch,
> HDFS-8203.003.patch
>
>
> In HDFS-7782 and HDFS-8033, we handle pread and stateful read for
> {{DFSStripedInputStream}}, we also need handle other operations, such as
> {{seek}}, zerocopy read ...
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