Data Node Not Starting

[#1]

The following error is generated when adding a new data node to the cluster:

WARN datanode.DataNode (DataNode.java:checkStorageLocations(2407)) - Invalid dfs.datanode.data.dir

[#2 · Accepted solution]

Even if the path is right, check the permissions. Typically the hdfs user should be the owner the group should be hadoop for the data directory:

chown -R hdfs /path-to-your-datanode-data-dir

chgrp -R hadoop /path-to-your-datanode-data-dir

chmod 750 /path-to-your-datanode-data-dir

[#3]

What if all the permission are correct but the data node does not start

[#4]

In my case , I see this problem right now

[#5]

Is there getting same warning or anything else?