hadoop部署错误
执行./hadoop fs -ls /
出现：Bad connection to FS. command aborted. exception: Call to localhost/127.0.0.1:8020 failed on connection exception: java.net.ConnectException: Connection refused错误
解决方法：
$ jps
3096 JobTracker
5400 Jps//没有namenode
?
$ ./stop-all.sh ??????
$ ./hadoop namenode -format
$?./start-all.sh?
