Minor Description
When Karaf is configured with KARAF_DATA and KARAF_BASE pointing to the same directory, Karaf doesn't start when issueing the ./start clean command.
The clean option executes a rm -Rf "$KARAF_DATA" which deletes the data directory. After this Karaf refuses to start because it cannot find the base directory (which is the same).
It would be better if the clean option would only delete the directory content and not the folder itself, e.g. using rm -Rf "$KARAF_DATA/**".