4. Enable Hostmap Debugging

	Warning
	Changing the rootLogger value from ERROR to DEBUG generates a large amount of debug logging.

Enable additional logging by editing the gateway-log4j.properties file in the directory.

Edit the /etc/knox/conf/ gateway-log4j.properties file.
Change ERROR to DEBUG on the following line:
```
log4j.rootLogger=ERROR, drfa
```

Restart the gateway:

su -l knox -c '$gateway_home/bin/gateway.sh stop'
su -l knox -c '$gateway_home/bin/gateway.sh start'