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https://issues.apache.org/jira/browse/HADOOP-2325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12549524
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Doug Cutting commented on HADOOP-2325:
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I certainly agree that we should strongly encourage Java 6, but I'm not yet
sure that we must require it. The primary Java6 feature that's been identified
as useful is File.getFreeSpace(), but this will not totally replace df, since
Java still doesn't give the mount point, and we'll still need to invoke lots of
other shell commands. So, assuming HADOOP-2344 fixes the current df problems,
is there a reason to require Java 6?
> Require Java 6 for release 0.16.
> --------------------------------
>
> Key: HADOOP-2325
> URL: https://issues.apache.org/jira/browse/HADOOP-2325
> Project: Hadoop
> Issue Type: Improvement
> Components: build
> Reporter: Doug Cutting
> Fix For: 0.16.0
>
>
> We should require Java 6 for release 0.16. 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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