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https://issues.apache.org/jira/browse/HADOOP-14897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16176793#comment-16176793
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Chris Douglas commented on HADOOP-14897:
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bq. I would assume that a minor release requires only minor releases in 
dependencies
That's a reasonable proposal. As I read the current draft, upgrading minor 
versions of dependencies is prohibited.

bq. C++ standards before C+14, this requirement would assume that 5.1 will not 
add a requirement of C+14 as a minimum
Also reasonable, but also different from the current text.

bq. would you allow Hadoop 2.9 ship with a requirement of Java 8, if 2.8 
depended on Java 7 before?
To use this example, I would not require that Hadoop compile and run against a 
particular build of openjdk. That's too restrictive.

> Loosen compatibility guidelines for native dependencies
> -------------------------------------------------------
>
>                 Key: HADOOP-14897
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14897
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: documentation, native
>            Reporter: Chris Douglas
>            Assignee: Daniel Templeton
>            Priority: Blocker
>
> Within a major version, the compatibility guidelines forbid raising the 
> minimum required version of any native dependency or tool required to build 
> native components.



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