Hadoop: start-dfs.sh权限被拒绝
我正在笔记本电脑上安装Hadoop。SSH工作正常，但我无法启动hadoop。
munichong@GrindPad:~$ ssh localhost
Welcome to Ubuntu 12.10 (GNU/Linux 3.5.0-25-generic x86_64)
* Documentation: https://help.ubuntu.com/
0 packages can be updated.
0 updates are security updates.
Last login: Mon Mar 4 00:01:36 2013 from localhost
munichong@GrindPad:~$ /usr/sbin/start-dfs.sh
chown: changing ownership of `/var/log/hadoop/root': Operation not permitted
starting namenode, logging to /var/log/hadoop/root/hadoop-munichong-namenode-GrindPad.out
/usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-munichong-namenode.pid: Permission denied
usr/sbin/hadoop-daemon.sh: line 135: /var/log/hadoop/root/hadoop-munichong-namenode-GrindPad.out: Permission denied
head: cannot open `/var/log/hadoop/root/hadoop-munichong-namenode-GrindPad.out' for reading: No such file or directory
localhost: chown: changing ownership of `/var/log/hadoop/root': Operation not permitted
localhost: starting datanode, logging to /var/log/hadoop/root/hadoop-munichong-datanode-GrindPad.out
localhost: /usr/sbin/hadoop-daemon.sh: line 135: /var/log/hadoop/root/hadoop-munichong-datanode-GrindPad.out: Permission denied
localhost: /usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-munichong-datanode.pid: Permission denied
localhost: head: cannot open `/var/log/hadoop/root/hadoop-munichong-datanode-GrindPad.out' for reading: No such file or directory
localhost: chown: changing ownership of `/var/log/hadoop/root': Operation not permitted
localhost: starting secondarynamenode, logging to /var/log/hadoop/root/hadoop-munichong-secondarynamenode-GrindPad.out
localhost: /usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-munichong-secondarynamenode.pid: Permission denied
localhost: /usr/sbin/hadoop-daemon.sh: line 135: /var/log/hadoop/root/hadoop-munichong-secondarynamenode-GrindPad.out: Permission denied
localhost: head: cannot open `/var/log/hadoop/root/hadoop-munichong-secondarynamenode-GrindPad.out' for reading: No such file or directory
munichong@GrindPad:~$ sudo /usr/sbin/start-dfs.sh
[sudo] password for munichong:
starting namenode, logging to /var/log/hadoop/root/hadoop-root-namenode-GrindPad.out
localhost: Permission denied (publickey,password).
localhost: Permission denied (publickey,password).我用了"sudo“。但该许可仍被拒绝。
有没有人能帮我？
提前感谢！
回答 10
Stack Overflow用户
发布于 2015-04-22 00:14:57
在过去的几个小时里，我一直纠结于同一个问题，但最终还是解决了。我将hadoop安装解压到运行hadoop时所使用的用户。因此不会产生用户权限问题。
我的配置是这样的: Google Cloud上的Ubuntu linux机器。
Hadoop安装目录/home/ Hadoop data directory /var/lib/hadoop，目录访问位为777，因此任何人都可以访问。我使用ssh进入远程机器，对配置文件进行了更改并执行start-dfs.sh，然后它给出了"Permission denied (Public key)“，所以解决方案是这样的:在同一个ssh终端中：
- ssh-keygen
2.它将询问复制密钥的文件夹位置，我输入了/home/hadoop/.ssh/id_rsa
3.它将要求提供密码短语，为简单起见，请将其保留为空。
4.授权cat//hadoop/.ssh/id_rsa.pub >> .ssh/authorized_ key (将新生成的公钥复制到用户home/.ssh目录下的文件)
- ssh localhost
- start-dfs.sh (现在应该可以工作了！)
Stack Overflow用户
发布于 2014-12-09 02:25:18
我遇到了同样的问题，所以尝试连接SSH并得到类似"not found“的语句，因此我通过以下步骤转到ssh位置进行调试：
cd ~/.ssh
ssh-keygen -t rsa -p""
cat id_rsa.pub >> authorized_keys
..。然后它成功了..。
Stack Overflow用户
发布于 2013-03-05 20:03:53
尝试将文件夹：/var/log/hadoop/root的所有权更改为用户：munichong。与所有系统一样，日志目录需要由hadoop编辑。因此，它需要拥有编辑日志文件夹及其内容的权限。
在这种情况下，HADOOP将无法工作，因为这需要拥有更改文件夹内容的权限，即使在此脚本完成其工作后，也要在后台启动sudo服务。
https://stackoverflow.com/questions/15211848
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