: Yes, I specifically made a package in my custom plugins code that was in 
: the solr package space i.e.: org.apache.solr.update.processor
        ...
: completely fine within my unit tests as it was loaded with the same 
: class loader (junit test run). I believe the specific issue that I came 
        ...
: something is a bit screwy with the external resource loader as this 
: should work (as long as the custom class is within the same package name 
: as Solr).

Ah, ok - so yeah: what you were doing at compile time was valid, but by 
then loading those "org.apache.solr.*" classes as a plugin (vs putting 
them in the war with the other classes in that pacakge) is definitely what 
caused the problem -- at runtime class/package identity includes the 
ClassLoader...

http://www.cooljeff.co.uk/2009/05/03/the-subtleties-of-overriding-package-private-methods/

ie: not a bug in Solr's plugin ClassLoader, just the devil-in-the-details 
of how a "package" is defined as far as the runtime goes.  (And 
unfortunately, the "@Override" check in java is source annotation only - 
there's no way to ask the JVM to enforce that and treat it as an assertion 
or anything like that)



-Hoss
http://www.lucidworks.com/

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