this error comes when trying to create a new table on Hbase Standalone way.
hbase:002:0> create 'test', 'cf'
ERROR: KeeperErrorCode = ConnectionLoss for /hbase/master
you can miss the command of running the HBase master. you should run the Hbase master node using this code
[your Hbase path]/bin/start-hbase.sh
and then you cane see the dashboard of the master-status
on port 16010
like below.
http://localhost:16010/
read more on official documentation.