Support Questions

Balakumar90 · ‎07-07-2014

I tried to add another host via cloudera manager .

I followed the below steps

1. Hosts - > Add hosts -> provided the ip address -> CM asked me to create a host template but i gave none and finised .

2. Found the host in good health .

3. Cluster -> HDFS -> Instances -> Add -> I added a Datanode with the new hosts.

(Now the Datanode i added was not starting , When i search for logs via UI i dont find any . I searched for logs in logs/datanode folder , but there was no Datanode folder in Var .)

4. Cluster -> Deploy client Configuration -> Completed -> Still the Datanode was not starting .

Please help .

Thanks

Bala

Thanks
Bala

Darren · ‎07-31-2014

The fatal message is more interesting than the warning. It's complaining about incompatible cluster ids.

Are you adding a datanode that already has data in the data dir on local disk? The data there probably has a conflicting cluster id. You should probably delete the local data dir(s) (or move them out of the way).

View solution in original post

Vickie · ‎12-20-2018

Format the datanode using the ID

hdfs namenode -format -clusterId a0bb577e-3180-46e3-bc17-982bfc576011

Restart the datanode, it will start fine.

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Support Questions

Datanode is not starting