Spark EC2 SSH连接错误SSH返回代码255

每次我尝试通过 Spark ec2/spark_ec2.py 文件在 AWS 上启动 Spark 集群时，都会收到 SSH 连接错误：最终解决了，但是浪费了很多时间。

在您将其标记为重复之前，我知道有很多类似的问题被问到，但有两个关键区别：a）我的联系always（最终）完成，我最终得到一个健康的 Spark 集群，b）其他问题的“答案”通常集中在以前的 Spark 版本（例如 1.2、1.3 等）。从 12 个月前的 1.3 到今天的 1.6.1，我一直遇到这个问题。

提前致谢！

终端输出：

Launched master in us-east-1e, regid = r-a1b2c3d4
Waiting for AWS to propagate instance metadata...
Waiting for cluster to enter 'ssh-ready' state...........

Warning: SSH connection error. (This could be temporary.)
Host: ec2-xx-xx-xx-xxx.compute-1.amazonaws.com
SSH return code: 255
SSH output: ssh: connect to host ec2-xx-xx-xx-xxx.compute-1.amazonaws.com port 22: Connection refused

.

Warning: SSH connection error. (This could be temporary.)
Host: ec2-xx-xx-xx-xxx.compute-1.amazonaws.com
SSH return code: 255
SSH output: ssh: connect to host ec2-xx-xx-xx-xxx.compute-1.amazonaws.com port 22: Connection refused

.

Warning: SSH connection error. (This could be temporary.)
Host: ec2-xx-xx-xx-xxx.compute-1.amazonaws.com
SSH return code: 255
SSH output: ssh: connect to host ec2-xx-xx-xx-xxx.compute-1.amazonaws.com port 22: Connection refused

.

Warning: SSH connection error. (This could be temporary.)
Host: ec2-xx-xx-xx-xxx.compute-1.amazonaws.com
SSH return code: 255
SSH output: ssh: connect to host ec2-xx-xx-xx-xxx.compute-1.amazonaws.com port 22: Connection refused

.

Warning: SSH connection error. (This could be temporary.)
Host: ec2-xx-xx-xx-xxx.compute-1.amazonaws.com
SSH return code: 255
SSH output: ssh: connect to host ec2-xx-xx-xx-xxx.compute-1.amazonaws.com port 22: Connection refused

.

Warning: SSH connection error. (This could be temporary.)
Host: ec2-xx-xx-xx-xxx.compute-1.amazonaws.com
SSH return code: 255
SSH output: ssh: connect to host ec2-xx-xx-xx-xxx.compute-1.amazonaws.com port 22: Connection refused

.

Warning: SSH connection error. (This could be temporary.)
Host: ec2-xx-xx-xx-xxx.compute-1.amazonaws.com
SSH return code: 255
SSH output: ssh: connect to host ec2-xx-xx-xx-xxx.compute-1.amazonaws.com port 22: Connection refused

.
Cluster is now in 'ssh-ready' state. Waited 833 seconds.
Generating cluster's SSH key on master...

请检查 EC2 中的安全组是否打开了 ssh 端口(22)。