There are frequent situations where a JDK forest has been mis-configured with sub-repositories having the wrong name or being in the wrong position, or a repository containing garbage files/directories that could cause a build failure or mis-configured build.

The suggested RFE here is to have a list of repository names and locations that are acceptable, and verify these with a sanity check.
The allowed subsets could also be checked, e.g. maybe requiring all 3 jaxp/jaxws/corba if any is there?
Some kind of rules that could be configured.

Implementation.... exercise left to the assigned....