hadoop 2.5.2 WARN util.NativeCodeLoader: Unable to load native-hadoop library

错误信息：WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
解决步骤：
1.在hadoop-env.sh中设置DEBUG
export HADOOP_ROOT_LOGGER=DEBUG,console

2.执行start-dfs.sh

发现问题所在libc.so.6: version `GLIBC_2.14' not found

3. 下载2.14版本glibc安装

wget http://ftp.gnu.org/gnu/glibc/glibc-2.14.tar.gz

tar xvzf glibc-2.14.tar.gz

cd glibc-2.14

mkdir build

cd ./build

../configure --prefix=/opt/glibc-2.14

make -j4

make install

4.修改环境变量

export LD_LIBRARY_PATH=/opt/glibc-2.14/lib:$HADOOP_HOME/lib/native