开启 NameNode 和 DataNode报错了,这个怎么处理?
[root@localhost hadoop]# ./sbin/start-dfs.sh
Starting namenodes on [localhost]
localhost: ssh: connect to host localhost port 22: Connection refused
localhost: ssh: connect to host localhost port 22: Connection refused
Starting secondary namenodes [0.0.0.0]
0.0.0.0: ssh: connect to host 0.0.0.0 port 22: Connection refused
[root@localhost hadoop]# jps
1994 Jps