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https://issues.apache.org/jira/browse/HADOOP-2325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12601140#action_12601140
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Steve Loughran commented on HADOOP-2325:
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It should be fairly trivial to run File.getFreeSpace() using introspection;
what is equally interesting is the java6 script engine and built in javascript
interpreter; you could add support for mappers and reducers written in JS or
another supported language.
I would strongly argue against anyone using JAXB or the JAX-WS runtime built
into Java6, as the exact version varies from point release of the JVM.. java 6
U4 and later provides a different JAXB runtime, just to break everyone's code.
This effectively means 'dont use JAXB or JAX-WS'.
> 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: 0.18.0
>
> 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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