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Date: Thu, 28 Jun 2012 14:21:44 +0000 (UTC)
From: "Robert Joseph Evans (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-8535) Cut hadoop build times in half
 (upgrade maven-compiler-plugin to 2.5.1)
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    [ https://issues.apache.org/jira/browse/HADOOP-8535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13403119#comment-13403119 ] 

Robert Joseph Evans commented on HADOOP-8535:
---------------------------------------------

I just turned around and saw that Jon was out today, so I will check it in instead :).
                
> Cut hadoop build times in half (upgrade maven-compiler-plugin to 2.5.1)
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-8535
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8535
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: build
>    Affects Versions: 0.23.3, 2.0.1-alpha
>            Reporter: Jonathan Eagles
>            Assignee: Jonathan Eagles
>         Attachments: HADOOP-8535.patch
>
>
> starting with 2.4.0 maven-compiler-plugin started caching the class loader for the javac compiler. This patch upgrades the compiler to 2.5.1. On my box, build times are reduced from 5 minutes to 2 minutes. 

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