在启动sdc后在emr中安装streamset时，我们将给出以下命令

ssh -N -p 22 hadoop@ec2-34-207-150-21.compute-1.amazonaws.com -i /home/hadoop/sterling-emr-keypair.pem -L 18630:localhost:18630

给出的误差为：

bind: Address already in use
channel_setup_fwd_listener: cannot listen to port: 18630
Could not request local forwarding.
^CKilled by signal 2.

由于此错误，我无法访问localhost上的stremsets用户界面