There are many reasons for Geoserver WPS processes to fail when initializing, but the most possible is missing dependences. Anyway, it is not always clear which one, since Geoserver provides absolutely no output when a process fails to init for some reason. Setting
log4j.rootLogger=TRACE, stdout in
resources\log4j.properties does nothing in my Geoserver 2.11.0 standalone.
Only thing I need is a message that shows what is wrong with a process class. Any directions please?