启动hadoop集群时运行start-dfs.sh时出现错误报错，node01: Error: JAVA_HOME is not set and could not be found.

Question

自己自学搭建hadoop集群，所有需要的包都安装了，JDK版本为1.8.0_181,hadoop版本为2.7.5，环境变量也都搭建好了，hadoop-env.sh文件也配置好了环境变量，但在启动hadoop集群时，启动HDFS模块出现错误：
如图：hadoop-env.sh文件配置好了环境变量

在运行start-dfs.sh时出现错误：
node02: Error: JAVA_HOME is not set and could not be found.
node03: Error: JAVA_HOME is not set and could not be found.
node01: ssh: Could not resolve hostname \357\273\277node01: Name or service not known

求各位大神帮助解答，万分感谢

Answer 1

node02 node03你是不是漏设置JAVA_HOME了，实在不行你设置环境变量好了、