#ubuntu – java.io.IOException: All directories in dfs.datanode.data.dir are invalid

[winmundo]

ubuntu – java.io.IOException: All directories in dfs.datanode.data.dir are invalid

1.sudo chown vaughn:hadoop -R /usr/local/hadoop_store

where hadoop is group name. use

grep vaughn /etc/group

in your terminal to see your group name.

2.clean temporary directories.

3.Format the name node.

Hope this helps.

Looks like its a permission issue, The user which is used to start datanode should have write access in the data node -data directories.

Try to execute the below command before starting datanode service.