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https://issues.apache.org/jira/browse/HDFS-10104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinayakumar B deleted HDFS-10104:
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> CLONE - Erasure coding: properly handle start offset for internal blocks in a
> block group
> -----------------------------------------------------------------------------------------
>
> Key: HDFS-10104
> URL: https://issues.apache.org/jira/browse/HDFS-10104
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: dragon
> Assignee: Zhe Zhang
> Fix For: HDFS-7285
>
>
> {code}
> void actualGetFromOneDataNode(final DNAddrPair datanode,
> ...
> LocatedBlock block = getBlockAt(blockStartOffset);
> ...
> fetchBlockAt(block.getStartOffset());
> {code}
> The {{blockStartOffset}} here is from inner block. For parity blocks, the
> offset will overlap with the next block group, and we may end up with
> fetching wrong block. So we have to assign a meaningful start offset for
> internal blocks in a block group, especially for parity blocks.
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