启动Hadoop文件系统时报错：
18/06/21 00:45:57 WARNutil.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
首先打开调试，查看具体的报错信息
在/etc/profile中，添加
Export HADOOP_ROOT_LOGGER=DEBUG,console
最后记得使配置生效：source /etc/profile
查看错误信息
错误信息如下：Failed to load native-hadoop with error:java.lang.UnsatisfiedLinkError:/usr/soft/hadoop/hadoop-2.5.2/lib/native/libhadoop.so.1.0.0: /lib64/libc.so.6:version `GLIBC_2.14'
not found (required by/usr/soft/hadoop/hadoop-2.5.2/lib/native/libhadoop.so.1.0.0)
可以看到是因为系统的glibc版本太低，查看当前系统的glibc支持的所有版本
strings /lib64/libc.so.6 |grep GLIBC_
可以看到并不支持2.14的版本
本次下载的是glibc-2.14.tar.xz压缩包，解压到任意目录
[[email protected] glibc-2.14]# pwd
/usr/soft/glibc-2.14
[[email protected] glibc-2.14]# xz -dglibc-2.14.tar.xz
[[email protected] glibc-2.14]# tar xvfglibc-2.14.tar
[[email protected] glibc-2.14]# cd glibc-2.14
[[email protected] glibc-2.14]# mkdir build
[[email protected] glibc-2.14]# cd build
[[email protected] build]# ../configure --prefix=/opt/glibc-2.14
[[email protected] build]# make -j4
[[email protected] build]# sudo make install
[[email protected] build]# exportLD_LIBRARY_PATH=/opt/glibc-2.14/lib:$LD_LIBRARY_PATH
[[email protected] build]# cp/opt/glibc-2.14/lib/libc-2.14.so /lib64/libc-2.14.so
[[email protected] build]# mv/lib64/libc.so.6 /lib64/libc.so.6.bak
[[email protected] build]#LD_PRELOAD=/lib64/libc-2.14.so ln -s /lib64/libc-2.14.so /lib64/libc.so.6
最后执行strings /lib64/libc.so.6 |grep GLIBC_，查看glibc是否更新
[[email protected] var]# strings/lib64/libc.so.6 |grep GLIBC_
