1. Of course. Try sending the initial report that focused on PLUCL.
Note, the latest snapshot tries to remedy the CACHE_CLASSES issue - it is being cleared after the Tool is executed. The memory dump should show wether that is indeed the case or not. Note that there might be another leak that we have to patch.
2. SHDP doesn't load the classes - it creates a custom classloader and gives control to the Tool instance. Hadoop however has to load them (when executing the Tool). If there would be no leaks, the classloader and its classes would go away - however Hadoop 'pins' the classloader internally. Thus it cannot be GC'ed.
The test that you devised works - keep sending it back and we'll sort out any leaks that we can. Maybe we can't address them all but for sure it will improve performance and it will help identify the bugs in Hadoop which will get sorted out.