运行start-dfs.sh时出现权限被拒绝的错误 [英] Permission Denied error while running start-dfs.sh

问题描述

我在执行 start-dfs.sh

Starting namenodes on [localhost] 
pdsh@Gaurav: localhost: rcmd: socket: Permission denied 
Starting datanodes
pdsh@Gaurav: localhost: rcmd: socket: Permission denied
Starting secondary namenodes [Gaurav]
pdsh@Gaurav: Gaurav: rcmd: socket: Permission denied 2017-03-13 09:39:29,559 
WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

使用hadoop 3.0 alpha 2版本.

Using hadoop 3.0 alpha 2 version.

感谢您的帮助

推荐答案

我也遇到了同样的事情，我也是我发现我的pdsh默认rcmd是rsh，不是ssh，rsh和ssh远程登录身份验证是不相同的，在安装hadoop时，我配置了ssh localhost无密码登录，但是rsh是不可能的.

I also encountered the same thing, I did so I found that my pdsh default rcmd is rsh, not ssh, rsh and ssh remote login authentication is not the same, when installing hadoop I configured ssh localhost password-free login, but rsh is not possible.

所以，尝试:

1.检查您的pdsh默认rcmd rsh

1.check your pdsh default rcmd rsh

pdsh -q -w localhost

查看您的pdsh默认rcmd是什么.

See what your pdsh default rcmd is.

2.将pdsh的默认rcmd修改为ssh

2.Modify pdsh's default rcmd to ssh

export PDSH_RCMD_TYPE=ssh

您可以添加到〜/.bashrc和 source〜/.bashrc

you can be added to ~/.bashrc, and source ~/.bashrc

3. sbin/start-dfs.sh

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