1、启动Hadoop提示WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable

在/etc/profile中添加

export HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=/hadoop/hadoop-2.9.2/lib/native/"

参考链接
https://wenku.baidu.com/view/9f526961650e52ea55189897.html

2、运行mrjob任务提示Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
在hadoop-env.sh 中添加：

export HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=/hadoop/hadoop-2.9.2/lib/native/"
export HADOOP_COMMON_LIB_NATIVE_DIR="/hadoop/hadoop-2.9.2/lib/native/"

参考链接
https://www.cnblogs.com/youngyan/p/6000753.html