Jonathan Eagles created HADOOP-8535:
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             Summary: 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


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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