How to fix hadoop 2.2.0 with 64bit os ploblem

If you show a message 

"WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform."

you need to build hadoop source

1. download hadoop source

2. edit pom.xml
    https://issues.apache.org/jira/browse/HADOOP-10110

3. build hadoop
    mvn package -Pnative -DskipTests

4. copy libhadoop.so.1.0.0
    cp hadoop-common-project/hadoop-common/target/native/target/usr/local/lib/libhadoop.so.1.0.0 /usr/local/hadoop/lib/native/.