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https://issues.apache.org/jira/browse/HADOOP-2325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12608703#action_12608703
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Steve Loughran commented on HADOOP-2325:
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+1 to the move, with some caveats
* hudson has to move up first, to make sure it is happy
* backporting becomes tricky, and that includes to 18.x.
Stuff built with Java6 doesn't necessarily load in Java5; I've encountered
problems with libraries I built myself not loading in Java5. So keeping some
stuff java5 and java6 isn't going to work reliably. Best to make the jump and
spell it out in advance "18.x is the last java5 version".
> Require Java 6
> --------------
>
> Key: HADOOP-2325
> URL: https://issues.apache.org/jira/browse/HADOOP-2325
> Project: Hadoop Core
> Issue Type: Improvement
> Components: build
> Reporter: Doug Cutting
> Assignee: Doug Cutting
> Fix For: 0.19.0
>
> Attachments: HADOOP-2325.patch
>
>
> We should require Java 6 for release 0.17. Java 6 is now available for OS/X.
> Hadoop performs much better on Java 6. And, finally, there are features of
> Java 6 (like 'df') that would be nice to use.
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