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https://issues.apache.org/jira/browse/HDFS-1822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13018636#comment-13018636
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Allen Wittenauer commented on HDFS-1822:
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Let's say I'm using Fred's Bargain Basement Distribution of Apache Hadoop. I'm
using it in production which means it is Important and enterprise-y and stuff.
This version of Hadoop has underscores in all the RPC method calls. I notice
that Apache doesn't have underscores, but I want to switch to this version
without breaking my clients. I submit a patch that converts all the underscore
calls to non-underscores. Should we as Apache committers accept this patch?
> Editlog opcodes overlap between 20 security and later releases
> --------------------------------------------------------------
>
> Key: HDFS-1822
> URL: https://issues.apache.org/jira/browse/HDFS-1822
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.21.0, 0.22.0, 0.23.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Priority: Blocker
> Fix For: 0.22.0, 0.23.0
>
> Attachments: HDFS-1822.patch
>
>
> Same opcode are used for different operations between 0.20.security, 0.22 and
> 0.23. This results in failure to load editlogs on later release, especially
> during upgrades.
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