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https://issues.apache.org/jira/browse/HADOOP-2421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12559821#action_12559821
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Hrishikesh commented on HADOOP-2421:
------------------------------------

  I had a look at the patch LUCENE-1083. Looks like Jdiff requires 2 sets of 
java code.

  We have one set of java code (current / latest) in the svn tree, from where 
do i get the "OLD" one ?

  e.g. if I need to run jdiff today i will have trunk checked out onto my 
machine (and the current version in trunk is 1.6 ). Now I want to Jdff the 
trunk and 1.3 .. where do i get 1.3 code ? Does the user need to download and 
then pass the path to ant with -D option ?

> Release JDiff report of changes between different versions of Hadoop
> --------------------------------------------------------------------
>
>                 Key: HADOOP-2421
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2421
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: build
>            Reporter: Nigel Daley
>            Priority: Minor
>
> Similar to LUCENE-1083, it would be useful to report javadoc differences (ala 
> [JDiff|http://www.jdiff.org/]) between Hadoop releases.

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