Currently the CacheLoaderInterceptor does the following check to determine if it should check the loader for a value

if (e == null || e.isNull() || e.getValue() == null) {

Unfortunately this means it checks the loader when a null value is in the entry when using RR. This can cause an issue if another transaction commits that key and puts a value that results in that value being inserted into the loader.

This also is a performance issue for RR, since it has to check the loader over and over for a given key even if it was found null the first time.

Initial thought is to do something like setSkipRemoteGet and that could actually be used for a dual purpose possibly.