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https://issues.apache.org/jira/browse/HDFS-1822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13018144#comment-13018144
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Suresh Srinivas commented on HDFS-1822:
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The code in 21 and 22 comes from 20.security code promotion. When the code was
promoted, it is not merged correctly. Additionally 20.s and release based on
that are coming out soon.
What is the problem in adding handling of this in trunk?
> 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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