While starting Hadoop services, data node service is not running? How to check this problem?
We can check the problem in log's directory which is located at logs/hadoop-<username>-datanode-ubuntu.log check whether namenode cluster id and datanode cluster id are same or not, If not follow below steps: In the home directory go to hdata/dfs/data/current. nano VERSION change the Datanode clusterid same as NameNode clusterid. Save and Exit the file. start the services using start-dfs.sh
Color me silly but when did MapR get a NameNode?
I suspect someone is trying to game the system a bit.
Wrong question at wrong place
Retrieving data ...