5.3.7. NodeManager health
This host-level alert checks the node health property available from the NodeManager
          component.
 5.3.7.1. Potential causes
 5.3.7.2. Possible remedies
- Check in the NodeManager logs (- /var/log/hadoop/yarn) for health check errors and restart the NodeManager, and restart if
                necessary.
 
-  Check in the ResourceManager UI logs (- /var/log/hadoop/yarn) for health
                check errors.