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https://issues.apache.org/jira/browse/HADOOP-9517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13660963#comment-13660963
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Steve Loughran commented on HADOOP-9517:
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-Doug, good, though to guarantee it will add new unit tests (pull in old
release binaries, verify they can still parse newly created artifacts).
I fear for the native binaries -we have to depend on libsnappy &c to generate
compressed content that older versions of their libs can handle. It's also much
harder to pull in the old libs for regression testing, the way we can with JAR
files on the mvn repo
> Define Hadoop Compatibility
> ---------------------------
>
> Key: HADOOP-9517
> URL: https://issues.apache.org/jira/browse/HADOOP-9517
> Project: Hadoop Common
> Issue Type: Bug
> Components: documentation
> Reporter: Arun C Murthy
> Assignee: Karthik Kambatla
> Attachments: hadoop-9517.patch, hadoop-9517.patch, hadoop-9517.patch,
> hadoop-9517.patch
>
>
> As we get ready to call hadoop-2 stable we need to better define 'Hadoop
> Compatibility'.
> http://wiki.apache.org/hadoop/Compatibility is a start, let's document
> requirements clearly and completely.
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