Building hadoop 1.1 from the source code on centOS 6.3

1) prepare jdk

1. Download oracle jdk compressed version for linux
2. tar -xvf jdk-7u10-linux-x64.tar.gz into folder /usr/lib/jvm
3. alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_10-sun/bin/java  99 --slave /usr/bin/keytool keytool /usr/lib/jvm/jdk1.7.0_10-sun/bin/keytool --slave /usr/bin/rmiregistry rmiregistry /usr/lib/jvm/jdk1.7.0_10-sun/rmiregistry
4. alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_10-sun/bin/javac  99 --slave /usr/bin/jar jar /usr/lib/jvm/jdk1.7.0_10-sun/bin/jar --slave /usr/bin/rmic rmic /usr/lib/jvm/jdk1.7.0_10-sun/rmic
5. alternatives --config java
6. ln -s /usr/lib/jvm/jdk1.7.0_10-sun/ /usr/java/default (no need if we did not try oracle jdk rpm installer)

 2) prepare ant and ivy

1. check ant installation: rpm -qa | grep  ant
2. yum install ant
3. download ivy from apache
4. copy ivy jar files and dependent jars to /usr/share/ant/lib/

3) make sure automake is installed

1. yum install automake

4) make sure libtool is installed

1. yum install libtool

5) check out hadoop source code
 svn checkout http://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.1/

6) run ant command to build hadoop 1.1