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https://issues.apache.org/jira/browse/HDFS-8023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17325441#comment-17325441
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Stone commented on HDFS-8023:
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To use EC feature I will upgrade hdfs from 2.8 to 3.0+. if upgrade active
NameNode first,standByNode will read new editlog including EC feature,then
standByNode will failure as it can not resolve ec editlog.How to upgrade NN
> Erasure Coding: retrieve eraure coding schema for a file from NameNode
> ----------------------------------------------------------------------
>
> Key: HDFS-8023
> URL: https://issues.apache.org/jira/browse/HDFS-8023
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Kai Zheng
> Assignee: Vinayakumar B
> Priority: Major
> Fix For: HDFS-7285
>
> Attachments: HDFS-8023-01.patch, HDFS-8023-02.patch
>
>
> NameNode needs to provide RPC call for client and tool to retrieve eraure
> coding schema for a file from NameNode.
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