spark啓動失敗：localhost failed to add the host to the list of known hosts

問題描述：安裝了 spark（單機集羣模式），啓動命令：

$SPARK_HOME/sbin/start-all.sh

報錯：localhost failed to add the host to the list of known hosts

解決辦法：

ssh-keygen -t rsa
ssh-copy-id [email protected]

username 爲我們的本地用戶名。

參考鏈接：https://stackoverflow.com/questions/34928228/failed-to-add-the-host-to-the-list-of-known-hosts-how-to-debug/34928589