Google App Engine JSP can't deploy: java.lang.RuntimeException: Cannot get the System Java Compiler. Please use a JDK, not a JRE

Question

this is hopefully something simple but... Eclipse has been working relatively fine for everything except deploying to GAE.

I can run my GAE app locally, but when I

Answer 1

I tried setting my project jre to be the same as my eclipse jre according to AlohaCode's answer. This was insufficient for me. The answer was in my classpath, there is java.exe in C:\windows\system32 which was BEFORE my java home variable. The solution is to put the java home path before the C:\windows\system32 entry. I found the answer here: 2FL5sJ">https://groups.google.com/forum/?fromgroups=#!msg/google-appengine-java/RyFybJWUhU4/78UE_2FL5sJ