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/
当我尝试运行 start-all.sh 时，我得到这个：
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
我试图遵循这个问题，但没有任何变化：
使用 start-all.sh 启动 Hadoop 进程会遇到问题
Hadoop 权限问题
编辑：在我尝试了所有选项之后，唯一似乎有效的选项是export PDSH_RCMD_TYPE=ssh。 现在问题出在名称节点和数据节点上。它无法正常启动：
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
创建一个新文件
/etc/pdsh/rcmd_default
写"ssh"，然后保存并退出。确保输入返回字符并开始新行，否则将提示代码为 1 的 SSH 退出
echo "ssh" > /etc/pdsh/rcmd_default
我会检查：
export PDSH_RCMD_TYPE=ssh在终端中- 本地防火墙设置
- 以 root 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
对于您的其他问题：
- 在
hadoop-env.sh中设置JAVA_HOME，并确保此文件中的所有其他选项都正确 - 更改您的用户，
Attempting to start all Apache Hadoop daemons as vava in 10 seconds."vava">是错误的，请尝试su -l hdfs然后运行脚本
就我而言，您需要确保将 RSA 复制到当前本地主机
ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub hadoop@localhost
假设您使用"hadoop"登录到节点主节点