执行start-all.sh时Hadoop-Permission被拒绝

Question

我正在尝试在我的笔记本电脑上安装Hadoop。我遵循了以下指南：https://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/

vava@vava-ThinkPad:/usr/local/hadoop-3.1.1/sbin$ bash start-all.sh
WARNING: Attempting to start all Apache Hadoop daemons as vava in 10 seconds.

WARNING: This is not a recommended production deployment configuration.
WARNING: Use CTRL-C to abort.
Starting namenodes on [localhost]
pdsh@vava-ThinkPad: localhost: rcmd: socket: Permission denied
Starting datanodes
pdsh@vava-ThinkPad: localhost: rcmd: socket: Permission denied
Starting secondary namenodes [vava-ThinkPad]
pdsh@vava-ThinkPad: vava-ThinkPad: rcmd: socket: Permission denied
Starting resourcemanager
resourcemanager is running as process 3748.  Stop it first.
Starting nodemanagers
pdsh@vava-ThinkPad: localhost: rcmd: socket: Permission denied

使用start-all.sh启动hadoop进程会遇到问题

Hadoop权限问题

编辑：在我尝试了所有的选项之后，似乎唯一起作用的是export pdsh_rcmd_type=ssh。现在的问题是namenode和datanode。启动不正常：

vava@vava-ThinkPad:/usr/local/hadoop-3.1.1$ sbin/start-all.sh
WARNING: Attempting to start all Apache Hadoop daemons as vava in 10 seconds.
WARNING: This is not a recommended production deployment configuration.
WARNING: Use CTRL-C to abort.
Starting namenodes on [localhost]
pdsh@vava-ThinkPad: localhost: ssh exited with exit code 1
Starting datanodes
localhost: ERROR: Cannot set priority of datanode process 10937
pdsh@vava-ThinkPad: localhost: ssh exited with exit code 1
Starting secondary namenodes [vava-ThinkPad]
Starting resourcemanager
Starting nodemanagers

Answer 1

创建新文件

/etc/pdsh/rcmd_default

向其写入“ssh”，然后保存&退出。确保输入返回字符并开始一个新行，否则将提示代码为1的SSH退出

echo "ssh" > /etc/pdsh/rcmd_default