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From Da Zheng <zhengda1...@gmail.com>
Subject how to build hadoop in Linux
Date Fri, 31 Dec 2010 06:08:06 GMT
Hello,

I need to build hadoop in Linux as I need to make some small changes in the
code, but I don't know what is the simplest way to build hadoop. I googled it
and so far I only found two places that tell how to build hadoop. One is
http://bigdata.wordpress.com/2010/05/27/hadoop-cookbook-3-how-to-build-your-own-hadoop-distribution/.
I downloaded apache forrest, and do as it
ant -Djava5.home=/usr/lib/jvm/java-1.5.0-gcj-4.4/
-Dforrest.home=/home/zhengda/apache-forrest-0.8 compile-core tar
and get an error:
     [exec] BUILD FAILED
     [exec] /home/zhengda/apache-forrest-0.8/main/targets/validate.xml:158:
java.lang.NullPointerException
What does this error mean? it seems apache forrest is used to create hadoop
document and I just want to rebuild hadoop java code. Is there a way for me to
just rebuild java code? I ran "ant", it seems to work successfully, but I don't
know if it really compiled the code.

the other place I found is to show how to build hadoop with eclipse. I use
macbook and I have to ssh to linux boxes to work on hadoop, so it's not a very
good option even if it can really work.

Best,
Da

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