正在启动辅助名称节点[7]
7:ssh:连接到主机0.0.0.7端口22:连接超时
由于连接超时，辅助namenode未启动如何在ubuntu 20.04.1 lts上修复此问题？
vivek@7：~$start-all.sh

WARNING: Attempting to start all Apache Hadoop daemons as pradeep in 10 seconds.
WARNING: This is not a recommended production deployment configuration.
WARNING: Use CTRL-C to abort.
Starting namenodes on [localhost]
Starting datanodes
Starting secondary namenodes [7]
7: ssh: connect to host 0.0.0.7 port 22: Connection timed out
2020-10-15 18:00:39,116 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting resourcemanager
Starting nodemanagers

vivek@7：~日元

6256 NodeManager
5649 NameNode
6098 ResourceManager
6586 Jps
5788 DataNode