5.1.6. NameNode edit logs directory status

This host-level alert is triggered if the NameNode cannot write to one of its configured edit log directories.

At least one of the multiple edit log directories is mounted over NFS and has become unreachable
The permissions on at least one of the multiple edit log directories has become read-only

Check permissions on all edit log directories
Use the dfs.name.dir parameter in the hdfs-site.xml file on the NameNode to identify the locations of all the edit log directories for the NameNode. Check whether the NameNode can reach all those locations.