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https://issues.apache.org/jira/browse/HADOOP-13714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Templeton updated HADOOP-13714:
--------------------------------------
    Attachment: Compatibility.pdf
                HADOOP-13714.004.patch
                InterfaceClassification.pdf

I've updated the guidelines to specifically address metadata versioning.  I've 
also called out compatible and incompatible changes to audience and change 
compatibility annotations in the interface classification doc.  Let me know 
what else I need to fix, adjust, or include.

> Tighten up our compatibility guidelines for Hadoop 3
> ----------------------------------------------------
>
>                 Key: HADOOP-13714
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13714
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 2.7.3
>            Reporter: Karthik Kambatla
>            Assignee: Daniel Templeton
>            Priority: Blocker
>         Attachments: Compatibility.pdf, Compatibility.pdf, 
> HADOOP-13714.001.patch, HADOOP-13714.002.patch, HADOOP-13714.003.patch, 
> HADOOP-13714.004.patch, HADOOP-13714.WIP-001.patch, 
> InterfaceClassification.pdf, InterfaceClassification.pdf
>
>
> Our current compatibility guidelines are incomplete and loose. For many 
> categories, we do not have a policy. It would be nice to actually define 
> those policies so our users know what to expect and the developers know what 
> releases to target their changes. 



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