HADOOP -拒绝执行star-all.sh的权限

Question

我在我的笔记本上安装Hadoop。我遵循了这个指南：https://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/

当我尝试运行start-all.sh时，我得到了这样的信息：

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

我试着回答这个问题，但没什么改变：

starting hadoop process using start-all.sh runs into issues

Hadoop permission issue

编辑:在我尝试了所有选项之后的，似乎唯一有效的选项是export PDSH_RCMD_TYPE=ssh。现在问题在于namenode和datanode。它没有正确地开始：

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

我会检查：

• 终端中的export PDSH_RCMD_TYPE=ssh
• 本地防火墙设置
• 以root用户身份运行命令：sudo /usr/local/hadoop-3.1.1/sbin$ bash start-all.sh
• chmod -R 755 /usr/local/hadoop-3.1.1

关于你的补充问题：

• 在JAVA_HOME中设置hadoop-env.sh并确保该文件中所有其他选项都正确
• 更改您的用户，"**vava**" Attempting to start all Apache Hadoop daemons as vava in 10 seconds.是错误的，尝试su -l hdfs，然后运行脚本

Answer 2

创建一个新文件

/etc/pdsh/rcmd_default

写“ssh”到它，然后保存和退出。请确保输入返回字符并启动新行，否则将提示使用代码1的SSH退出。

echo "ssh" > /etc/pdsh/rcmd_default

Answer 3

在我的例子中，您需要确保将RSA复制到当前的本地主机。

ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub hadoop@localhost

假设您是用"hadoop“登录到节点主节点的。