参考了下列文章的方法；
本次采用的是hadoop 2.6.0，系统是oracle linux 6.6 x64,
发现hadoop要求glibc 2.14以上版本，oracle linux 6.6的glibc版本为2.12；oracle linux 7上为2.17
安装过程出现报错，错误内容如下：

2.Start NameNode daemon and DataNode daemon:
  $ sbin/start-dfs.sh
[root@oel6x64 hadoop]# sbin/start-dfs.sh
15/04/17 22:05:51 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [localhost]
localhost: starting namenode, logging to /usr/hadoop/logs/hadoop-root-namenode-oel6x64.out
localhost: starting datanode, logging to /usr/hadoop/logs/hadoop-root-datanode-oel6x64.out
Starting secondary namenodes [0.0.0.0]
The authenticity of host '0.0.0.0 (0.0.0.0)' can't be established.
RSA key fingerprint is b2:cb:4b:3a:73:ac:16:61:c7:27:fe:95:b6:57:2f:1e.
Are you sure you want to continue connecting (yes/no)? yes
0.0.0.0: Warning: Permanently added '0.0.0.0' (RSA) to the list of known hosts.
0.0.0.0: starting secondarynamenode, logging to /usr/hadoop/logs/hadoop-root-secondarynamenode-oel6x64.out
15/04/17 22:07:38 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable





转：http://blog.csdn.net/jiedushi/article/details/7496327

部署hadoop的集群环境为  

操作系统 centos 5.8    

hadoop版本为cloudera   hadoop-0.20.2-cdh3u3

集群中设置支持gzip lzo压缩后，在对压缩文件进行读取或者对输入文件压缩的时候要使用到hadoop的本地库，本地库的默认位置在

$HADOOP_HOME/lib/native/Linux-amd64-64   (64位操作系统)

$HADOOP_HOME/lib/native/Linux-i386-32   （32位操作系统）

文件夹中的libhadoop.so文件，就是hadoop的本地库。

如果本地库不存在，或者本地库与当前操作系统的版本不一致的时候，会报下面的错误：

11/09/20 17:29:49 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable

增加调试信息设置

$ export HADOOP_ROOT_LOGGER=DEBUG,console

$ hadoop fs -text /test/data/origz/access.log.gz

2012-04-24 15:55:43,269 WARN org.apache.hadoop.util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

error libhadoop.so  /lib64/libc.so.6 required (libc 2.6)    /usr/local/hadoop/lib/native/Linux-amd64-64  

说明系统中的glibc的版本和libhadoop.so需要的版本不一致导致

查看系统的libc版本  

# ll /lib64/libc.so.6

lrwxrwxrwx 1 root root 11 Apr 24 16:49 /lib64/libc.so.6 -> libc-2.5.so

系统中的版本为2.5

将系统中的glibc升级为2.9

下载glibc
wget  http://ftp.gnu.org/gnu/glibc/glibc-2.9.tar.bz2

下载glibc-linuxthreads
wget http://ftp.gnu.org/gnu/glibc/glibc-linuxthreads-2.5.tar.bz2

解压
$tar -jxvf glibc-2.9.tar.bz2
$cd glibc-2.9
$tar -jxvf ../glibc-linuxthreads-2.5.tar.bz2
$cd ..
$export CFLAGS="-g -O2"
$./glibc-2.9/configure --prefix=/usr --disable-profile --enable-add-ons --with-headers=/usr/include --with-binutils=/usr/bin
$make
#make install

安装编译过程中需要注意三点：
1、要将glibc-linuxthreads解压到glibc目录下。
2、不能在glibc当前目录下运行configure。
3、加上优化开关，export CFLAGS="-g -O2"，否则会出现错误


安装完后，可以查看ls -l /lib/libc.so.6已升级

lrwxrwxrwx 1 root root 11 Apr 24 16:49 /lib64/libc.so.6 -> libc-2.9.so

测试本地库是否升级

$ export HADOOP_ROOT_LOGGER=DEBUG,console

$ hadoop fs -text /test/data/origz/access.log.gz

12/04/25 08:54:47 INFO lzo.LzoCodec: Successfully loaded & initialized native-lzo library [hadoop-lzo rev 6bb1b7f8b9044d8df9b4d2b6641db7658aab3cf8]
12/04/25 08:54:47 DEBUG util.NativeCodeLoader: Trying to load the custom-built native-hadoop library...
12/04/25 08:54:47 INFO util.NativeCodeLoader: Loaded the native-hadoop library
12/04/25 08:54:47 INFO zlib.ZlibFactory: Successfully loaded & initialized native-zlib library
12/04/25 08:54:47 DEBUG fs.FSInputChecker: DFSClient readChunk got seqno 0 offsetInBlock 0 lastPacketInBlock false packetLen 132100
可以看到将glibc升级后不再报错，已经成功加载本地库