配置Hadoop显示JAVA_HOME is not set。急求答案，谢谢！

Posted 2023-04-25

如图，JAVA_HOME is not set
D:\hadoop-1.0.3\conf中的hadoop-env.sh文件中JAVA_HOME已经用写字板改为：
export JAVA_HOME=/cygdrive/d/Java/jdk1.6.0_29
我的JAVA装在D盘Java中，感觉已经配好了，为什么还是显示not set呢？
急，谢谢了！

应该是系统环境变量设置了就可以了，不用再cygwin中设置吧

这个是我这里的配置

你查下XP或win7的JDK设置

希望对你有帮助。

参考技术A 没看清就乱回答，这是因为你修改hadoop-env.sh时用的是window自带的写字板，保存的时候用的是window的回车换行\r\n，只需要用工具打开hadoop-env.sh，另存成linux格式的就可以了追问

用什么工具啊？

之前是因为export前面的注释符号“#”没删除，导致JAVA_HOME is not set这个问题。改了以后又出现了另外的问题，输入命令后

这是为什么啊？

本回答被提问者采纳 参考技术B Java_HOME,就是jdk的安装目录，具体方法：下载个JDK，安装，然后打开控制面板》系统》高级系统设置》高级》环境变量》点击编辑，变量名为Java_Home,变量值为Java_Home的安装路径 参考技术C export命令是暂时的，命令一结束就没用了

hadoop启动时报错，java: No such file or directory和localhost: Error: JAVA_HOME is not set.

hadoop-env.sh文件中配置为

# The java implementation to use. Required.
# export JAVA_HOME=/cygdrive/d/Java/jdk1.6.0_26

jdk1.6.0_26安装路径为：

D:\Java\jdk1.6.0_26\

电脑中环境变量java_home为：

D:\Java\jdk1.6.0_26\;D:\Java\jdk1.6.0_26\jre\bin

完全按照《Hadoop开发者》第一期，在win7环境下配置的，运行./start-all.sh，报错java: No such file or directory和localhost: Error: JAVA_HOME is not set.

william@william-PC /cygdrive/d/hadoop/run/bin
$ ls
hadoop slaves.sh start-mapred.sh stop-mapred.sh
hadoop-config.sh start-all.sh stop-all.sh task-controller
hadoop-daemon.sh start-balancer.sh stop-balancer.sh
hadoop-daemons.sh start-dfs.sh stop-dfs.sh
rcc start-jobhistoryserver.sh stop-jobhistoryserver.sh

william@william-PC /cygdrive/d/hadoop/run/bin
$ ./start-all.sh
starting namenode, logging to /cygdrive/d/hadoop/run/libexec/../logs/hadoop-william-name node-william-PC.out
/cygdrive/d/hadoop/run/libexec/../bin/hadoop: line 321: D:\Java\jdk1.6.0_26\;D:\Java\jdk 1.6.0_26\jre\bin/bin/java: No such file or directory
/cygdrive/d/hadoop/run/libexec/../bin/hadoop: line 387: D:\Java\jdk1.6.0_26\;D:\Java\jdk 1.6.0_26\jre\bin/bin/java: No such file or directory
/cygdrive/d/hadoop/run/libexec/../bin/hadoop: line 387: exec: D:\Java\jdk1.6.0_26\;D:\Ja va\jdk1.6.0_26\jre\bin/bin/java: cannot execute: No such file or directory
localhost: starting datanode, logging to /cygdrive/d/hadoop/run/libexec/../logs/hadoop-w illiam-datanode-william-PC.out
localhost: Error: JAVA_HOME is not set.
localhost: starting secondarynamenode, logging to /cygdrive/d/hadoop/run/libexec/../logs /hadoop-william-secondarynamenode-william-PC.out
localhost: Error: JAVA_HOME is not set.
starting jobtracker, logging to /cygdrive/d/hadoop/run/libexec/../logs/hadoop-william-jo btracker-william-PC.out
/cygdrive/d/hadoop/run/libexec/../bin/hadoop: line 321: D:\Java\jdk1.6.0_26\;D:\Java\jdk 1.6.0_26\jre\bin/bin/java: No such file or directory
/cygdrive/d/hadoop/run/libexec/../bin/hadoop: line 387: D:\Java\jdk1.6.0_26\;D:\Java\jdk 1.6.0_26\jre\bin/bin/java: No such file or directory
/cygdrive/d/hadoop/run/libexec/../bin/hadoop: line 387: exec: D:\Java\jdk1.6.0_26\;D:\Ja va\jdk1.6.0_26\jre\bin/bin/java: cannot execute: No such file or directory
localhost: starting tasktracker, logging to /cygdrive/d/hadoop/run/libexec/../logs/hadoo p-william-tasktracker-william-PC.out
localhost: Error: JAVA_HOME is not set.

刚开始学hadoop，就遇到这个问题，已经周旋好几天好，始终解决不了，拜求大虾帮小弟看看啊！

参考技术A # The java implementation to use. Required.
# export JAVA_HOME=/cygdrive/d/Java/jdk1.6.0_26

------->
# The java implementation to use. Required
export JAVA_HOME=/cygdrive/d/Java/jdk1.6.0_26 参考技术B 很明显是java home没有配好 ，输入cd $JAVA_HOME，看行不行？本回答被提问者采纳 参考技术C 1234123