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https://issues.apache.org/jira/browse/HDFS-17521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chenyu Zheng updated HDFS-17521:
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Description:
I found that if the erasedIndexes distribution is such that the parity index is
in front of the data index, ec will produce wrong results when decoding.
In fact, HDFS-15186 has described this problem, but does not fundamentally
solve it.
> Erasure Coding: Fix calculation errors caused by special index order
> --------------------------------------------------------------------
>
> Key: HDFS-17521
> URL: https://issues.apache.org/jira/browse/HDFS-17521
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Chenyu Zheng
> Assignee: Chenyu Zheng
> Priority: Critical
>
> I found that if the erasedIndexes distribution is such that the parity index
> is in front of the data index, ec will produce wrong results when decoding.
> In fact, HDFS-15186 has described this problem, but does not fundamentally
> solve it.
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