Hadoop 2.6.0 启动问题 lib/native/libhadoop.so which might have disabled stack guard

Hadoop 在启动的时候出现以下问题：

bhbase6: Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so which might have disabled stack guard. The VM will try to fix the stack guard now.bhbase6: It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.bhbase2: Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so which might have disabled stack guard. The VM will try to fix the stack guard now.bhbase2: It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.bhbase5: Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so which might have disabled stack guard. The VM will try to fix the stack guard now.bhbase5: It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.

出现这个问题基本都是在64位操作系统上，这主要是因为Hadoop官网上下载的本地库文件都是基于32位系统编译的，如果在64位系统上运行会出现这个问题错误。解决的方法 有两种：

一、在64为操作系统上重写编译Hadoop文件

二、在etc/hadoop/目录中的 hadoop-env.sh和yarn-env.sh 这两个文件中添加如下两行代码：

export HADOOP_COMMON_LIB_NATIVE_DIR=${HADOOP_PREFIX}/lib/nativeexport HADOOP_OPTS="-Djava.library.path=$HADOOP_PREFIX/lib"