我在 Amazon Elastic MapReduce 上安装了 hadoop，每当我尝试重新启动集群时，都会收到以下错误：
/stop-all.sh
no jobtracker to stop
The authenticity of host 'localhost (::1)' can't be established. RSA key fingerprint is
Are you sure you want to continue connecting (yes/no)? yes
localhost: Warning: Permanently added 'localhost' (RSA) to the list of known hosts.
localhost: Permission denied (publickey).
no namenode to stop
localhost: Permission denied (publickey).
localhost: Permission denied (publickey).
知道如何重新启动hadoop吗？
以下黑客对我有用。
我已将 sbin/slaves.sh 和 sbin/hadoop-daemon.sh 中的“ssh”命令替换为“ssh -i ~/.ssh/keyname”
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