WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

一，通常编译好的hadoop库是在lib中，如果你不想编译，可以用lib/native里面的预编译库，然后把native的库移动到lib文件夹中。

cp hadoop-2.6.0/lib/native/* hadoop-2.6.0/lib/

二，加入系统变量

export HADOOP_COMMON_LIB_NATIVE_DIR=/home/administrator/work/hadoop-2.6.0/lib/native
export HADOOP_OPTS="-Djava.library.path=/home/administrator/work/hadoop-2.6.0/lib"
export HADOOP_ROOT_LOGGER=DEBUG,console

WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

原文：http://www.cnblogs.com/zhouj-happy/p/6186220.html