【Hadoop】执行start-dfs.sh出错

问题1：hadoop2.7.3部署警告： Unable to load native-hadoop library for your platform

解决办法：

1.编辑hadoop-env.sh

dream361@ubuntu:~$ vim /usr/local/hadoop/etc/hadoop/hadoop-env.sh 

2.修改HADOOP_OPTS：

# Extra Java runtime options.  Empty by default.
#export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"
export HADOOP_OPTS="-Djava.library.path=$HADOOP_PREFIX/lib:$HADOOP_PREFIX/lib/native"

问题2：The authenticity of host ‘0.0.0.0 (0.0.0.0)’ can’t be established.（错误）

解决办法：关闭防火墙

dream361@ubuntu:~$ sudo ufw disable

问题3：DEPRECATED: Use of this script to execute hdfs command is deprecated

分析：当前使用的hadoop 将hadoop命令切换为hdfs

例如查看目录命令

dream361@ubuntu:~$ hadoop dfs -ls /